Corn Growth Stages
描写玉米成长过程的作文
描写玉米成长过程的作文英文回答：Corn is a widely cultivated crop that goes through several stages of growth before it is ready for harvest. From seed to mature plant, the life cycle of a corn plantis fascinating.It all starts with planting the corn seeds. These seeds are typically sown in the spring when the soil is warm enough for germination. Farmers carefully prepare the soil by tilling it and removing any weeds or debris. Then, they plant the seeds in rows, ensuring proper spacing for each plant.Once the seeds are planted, they need warmth, moisture, and sunlight to germinate. As the days go by, the seeds begin to sprout, and tiny green shoots emerge from the soil. This is the first stage of growth, known as the seedling stage.During the seedling stage, the corn plant develops its roots and leaves. The roots grow deep into the soil, anchoring the plant and absorbing water and nutrients. The leaves, on the other hand, reach towards the sun, using the process of photosynthesis to convert sunlight into energy for the plant.As the corn plant continues to grow, it enters the next stage known as the vegetative stage. During this stage, the plant grows taller and produces more leaves. The stalk of the plant becomes thicker and stronger, providing support for the growing plant.In the vegetative stage, the corn plant also starts to develop tassels and ears. The tassels are the male flowers of the plant, while the ears are the female flowers. The tassels release pollen, which is carried by the wind to the ears, where fertilization takes place.Once fertilized, the ears of corn start to develop kernels. Each kernel represents a potential seed for thenext generation of corn plants. The kernels grow and fill out, becoming plump and juicy. This is the reproductive stage of the corn plant.Finally, after several months of growth, the corn plant reaches maturity. The kernels have fully developed and are ready for harvest. Farmers carefully monitor the corn plants, checking for signs of maturity such as dried husks and brown silks. When the time is right, the corn is harvested and can be used for a variety of purposes, such as food, animal feed, or even ethanol production.中文回答：玉米是一种广泛种植的作物，在成熟收获之前经历了几个生长阶段。
玉米的生育时期
玉米的生育时期从播种到新的种子成熟，叫做玉米的一生。
它经过若干个生育阶段和生育时期，才能完成其生活周期。
玉米从播种至成熟的天数，称为生育期。
生育期长短与品种、播种期和温度等有关。
一般早熟品种、播种晚的和温度高的情况下，生育期短，反之则长。
在玉米一生中，由于自身量变和质变的结果及环境变化的影响，不论外部形态特征还是内部生理特性，均发生不同的阶段性变化，这些阶段性变化，称为生育时期，各生育时期及鉴别标准如下。
（1）出苗期：播种后第一真叶展开的日期。
（2）拔节期：植株基部开始伸长，节间长度达1cm的日期。
此时，叶龄指数30左右，茎解剖观察，雄穗生长锥开始伸长。
（3）小喇叭口期：雌穗进入伸长期，雄穗进入小花分化期，叶龄指数46左右。
（4）大喇叭口期：植株可见叶与展开叶之间的差数达5、并且上部叶片呈现大喇叭口形的日期。
此时，叶龄指数60左右，解剖观察，雌穗进入小花分化期、雄穗进入四分体期。
（5）抽雄期：植株雄穗尖露出顶叶3-5cm的日期。
（6）开花期：植株雄穗开始散粉。
（7）吐丝期：植株雌穗的花丝露出苞叶的日期。
（8）籽粒建成期：植株果穗中部子粒体积基本建成，胚乳呈清浆状。
（9）乳熟期：植株果穗中部籽粒干重迅速增加并基本建成，胚乳呈乳状后至糊状。
（10）蜡熟期：植株果穗中部籽粒干重接近最大值，胚乳呈蜡状，用指甲可以划破。
（11）完熟期：植株子粒干硬，籽粒基部出现黑色层，乳线消失，并呈现出品种固有的颜色和光泽。
（12）收获期：记载具体的收获日期。
一般大田或试验田，以全田60％以上植株进入该生育时期为标志。
国际上对玉米生育时期的记录分为Vegetative Stages 和Reproductive Stages，其中Vegetative Stages又分为VE（emergence），V1（first leaf），V(n)（nth leaf），VT（tasseling）等，Reproductive Stages又分为R1（silking），R2（blister stage），R3（milk stage），R6（physiological maturity）等。
玉米各个生育时期地道英文表达方式PPT讲稿
Root hairs begin to form on Nodal Roots.
Seminal Root growth has basically stopped.
Grain Crops Extension, University of Kentucky
V6
Tassel development has started. Ear shoot formation has also started.
Grain Crops Extension, University of Kentucky
V6: Typically when lower leaves begin to tear off of stalk.
To be certain about V-stages beyond V6:
Split the entire stalk (from the tip to the roots) in half with a knife.
VE emergence V1 first leaf V2 second leaf V3 third leaf V(n) nth leaf VT tasseling
Reproductive Stages
R1 silking R2 blister R3 milk R4 dough R5 dent R6 physiological maturity
– Extension Distribution Center 119 Printing and Publications Building Iowa State University Ames, Iowa 50011-3171
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玉米各个生育时期地道英文表达方式
V15
Grain Crops Extension, University of Kentucky
V15
Ear shoots near the top of the plant are starting to out-grow ear shoots lower on the plant.
Lower part of plant
Grain Crops Extension, University of Kentucky
VT
Grain Crops Extension, University of Kentucky
Pollen shed
Grain Crops Extension, University of Kentucky
Grain Crops Extension, University of Kentucky
V6
Ear shoot. Growing point is above the ground.
Nodal Root System is the primary root system for nutrients and water.
V9
Growth rate rapidly increases. Greater demand for nutrients and water.
Ear shoot.
Ear shoot.
Ear shoot.
Growing point.
Grain Crops Extension, University of Kentucky
/corngrows.html
Grain Crops Extension, University of Kentucky
种玉米英语作文
种玉米英语作文Growing Corn: A Rewarding EndeavorCorn, a staple crop in many parts of the world, has been a fundamental part of human sustenance for centuries. As a versatile and nutritious grain, it has become an integral component of various cuisines and agricultural practices. One of the most rewarding experiences in the realm of agriculture is the cultivation of corn, or maize, as it is often referred to. In this essay, we will delve into the intricate process of growing corn, exploring the benefits, challenges, and the sense of accomplishment that comes with this endeavor.The journey of growing corn begins with the selection of the appropriate land. Corn thrives in well-drained, nutrient-rich soil that receives ample sunlight. Careful consideration must be given to the soil's pH level, as corn prefers a slightly acidic to neutral soil, typically ranging from 6.0 to 7.0 on the pH scale. Once the ideal location has been identified, the next step is to prepare the soil. This involves tilling the land, adding organic matter such as compost or well-rotted manure, and ensuring the soil is loose and aerated to facilitate the growth of the corn plants.The next crucial step is the selection of the corn variety. There are numerous varieties of corn, each with its own unique characteristics, such as color, sweetness, and maturity rate. Depending on the intended use of the corn, whether for human consumption, animal feed, or even biofuel production, the appropriate variety must be chosen. Some popular varieties include yellow dent corn, sweet corn, and popcorn, each with its own distinct flavor and texture.Once the soil and the corn variety have been selected, the planting process begins. Corn seeds are typically planted in rows, with the spacing between the rows and the individual seeds carefully calculated to optimize growth and yield. The depth at which the seeds are planted is also crucial, as it affects the germination and early development of the plants. Generally, corn seeds are planted about one to two inches deep, with the rows spaced approximately three feet apart.As the corn plants begin to grow, they require consistent care and attention. Weeding is an essential task, as unwanted plants can compete for essential nutrients and water, stunting the growth of the corn. Irrigation is also crucial, as corn is a thirsty crop that requires ample moisture throughout its growing season. Depending on the climate and rainfall patterns, supplemental watering may be necessary to ensure the plants receive the optimal amount of water.Fertilization is another critical aspect of growing corn. Corn is a heavy feeder, requiring a balanced blend of nutrients to thrive. A combination of nitrogen, phosphorus, and potassium, often referred to as the "N-P-K" ratio, is essential for the plant's healthy development. Applying the right fertilizer at the right time can significantly enhance the corn's yield and quality.As the corn plants mature, they undergo several distinct growth stages, each requiring specific care and attention. The tasseling and silking stages, for example, are crucial for pollination and the development of the corn kernels. Ensuring the plants receive adequate sunlight and proper nutrient levels during these stages is crucial for a successful harvest.The final and most rewarding stage of growing corn is the harvest. Depending on the variety and growing conditions, corn can be harvested anywhere from 60 to 120 days after planting. The timing of the harvest is crucial, as corn that is harvested too early may be immature and lack the desired sweetness and texture, while corn that is harvested too late may become starchy and lose its flavor.Growing corn is not without its challenges, however. Pests, such as corn borers and cutworms, can pose a significant threat to the crop, while diseases like corn smut and Fusarium ear rot can also compromise the yield and quality of the corn. Vigilant monitoringand the implementation of effective pest management strategies are essential to mitigate these risks.Despite the challenges, the rewards of growing corn are immense. The sense of accomplishment that comes with nurturing a crop from seed to harvest is truly gratifying. Moreover, the ability to enjoy the fresh, flavorful corn harvested from one's own garden or farm is a unique and satisfying experience. The versatility of corn also allows growers to explore various culinary applications, from grilling and boiling to incorporating it into a wide range of dishes.In conclusion, the cultivation of corn is a rewarding and enriching endeavor that not only provides a valuable food source but also connects us to the cycles of nature and the rhythms of the land. By understanding the intricacies of growing corn, we can appreciate the hard work and dedication that goes into bringing this staple crop to our tables. Whether you are an experienced farmer or a budding gardener, the joy of growing corn is a universal experience that transcends cultures and generations.。
玉米生长过程作文300
玉米生长过程作文300英文回答：The growth process of corn can be divided into several stages. Let's start with the first stage: planting. Farmers usually plant corn seeds in the spring when the soil temperature is warm enough. They sow the seeds in rows and make sure to provide enough water and sunlight for the seeds to germinate.After about a week, the second stage begins: germination. The seeds start to sprout and tiny roots and shoots emerge from the soil. This is a critical stage for the corn plant, as it needs enough moisture and nutrients to continue growing.Next comes the third stage: vegetative growth. During this stage, the corn plant grows rapidly and develops its leaves and stems. It needs plenty of sunlight and water to support its growth. Farmers often say that corn grows "ashigh as an elephant's eye" during this stage, as it can reach heights of up to 10 feet or more.The fourth stage is the reproductive stage. This is when the corn plant produces tassels and ears. The tassels are the male flowers that produce pollen, while the earsare the female flowers that develop into corn kernels. The plant relies on pollination to transfer the pollen from the tassels to the ears, usually done by wind or insects.Finally, we have the last stage: maturity and harvest. The corn kernels continue to develop and ripen, changing from green to yellow or brown. Farmers monitor the moisture content of the kernels to determine the best time to harvest. Once the corn is ready, it is harvested either by hand or using machines. The harvested corn can be used for various purposes, such as animal feed, ethanol production,or human consumption.中文回答：玉米的生长过程可以分为几个阶段。
有关玉米高产的作文
有关玉米高产的作文英文回答：Corn is a staple crop that is widely grown around the world. In order to achieve high yields of corn, there are several factors that need to be taken into consideration.Firstly, selecting the right variety of corn is essential. There are different types of corn, such as dent corn, sweet corn, and popcorn, each with their own specific characteristics and requirements. It is important to choose a variety that is well-suited to the local climate and soil conditions. For example, if you are in a region with a short growing season, it would be wise to choose a variety that has a shorter maturity period.Secondly, proper soil preparation is crucial for high corn yields. Corn requires well-drained soil that is rich in organic matter. Before planting, it is important to till the soil and remove any weeds or debris. Adding compost ormanure can also help improve the soil fertility and provide essential nutrients for the corn plants.Thirdly, adequate spacing and planting density are important factors for high corn yields. Corn plants should be planted in rows with sufficient spacing between them to allow for proper air circulation and sunlight penetration. The recommended planting density varies depending on the variety of corn, but generally, it is advisable to have around 25,000 to 35,000 plants per acre.Furthermore, proper irrigation and timely watering are crucial for the growth and development of corn plants. Corn requires regular watering, especially during the critical growth stages such as tasseling and pollination. It is important to ensure that the soil is evenly moist, but not waterlogged, as excessive moisture can lead to root rot and other diseases.Additionally, the application of fertilizers and pest control measures is necessary to achieve high corn yields. Corn plants require a balanced supply of essentialnutrients, such as nitrogen, phosphorus, and potassium. Regular soil testing can help determine the nutrient requirements of the corn plants. Furthermore, it is important to monitor and control pests and diseases that can affect the growth and yield of corn.In conclusion, achieving high corn yields requires careful planning and implementation of various agricultural practices. By selecting the right variety, preparing the soil properly, providing adequate spacing and planting density, ensuring proper irrigation and timely watering, and applying fertilizers and pest control measures, farmers can maximize their corn yields and contribute to food security.中文回答：玉米是一种广泛种植的主要作物。
三年级作文玉米的生长过程
三年级作文玉米的生长过程Growing up in a rural area, I have always been fascinated by the process of corn growth. 當我還是一個小孩的時候，我就喜歡在農村看玉米生長的過程。
I remember watching the small seeds being planted in the fertile soil, and eagerly waiting for them to sprout. 我記得看著小種子被種植在肥沃的土壤中，迫不及待地等待它們發芽。
It was such a magical experience to see the roots digging deep into the earth and the green shoots emerging from the ground. 看到根深深地伸入地底，綠色的嫩芽從土地中冒出來，真是一個神奇的體驗。
As the days went by, the corn plants grew taller and stronger, reaching towards the bright sun in the sky. 隨著日子一天天過去，玉米植物變得越來越高大、更加強壯，直指著天空中明亮的太陽。
I wouldoften spend hours in the cornfields, observing the changes in the plants and the insects and animals that lived among them. 我經常會在玉米地裡花上幾個小時，觀察植物的變化，以及在其中生活的昆蟲和動物。
It was a vibrant ecosystem, where each living creature played a unique role in the cycle of life. 這是一個充滿活力的生態系統，每一個生物都在生命的循環中扮演著獨特的角色。
种植玉米步骤的作文
种植玉米步骤的作文英文回答：Planting corn is an important and essential processthat requires careful planning and attention to detail. The following steps outline the process of planting corn:Step 1: Choose the right location.The first step in planting corn is to choose the right location for the crop. Corn requires well-drained soil and plenty of sunlight. It is important to select a location that receives full sun for at least 6-8 hours a day.Step 2: Prepare the soil.Before planting, it is important to prepare the soil by tilling it to a depth of 6-8 inches. This will help to loosen the soil and improve drainage. It is also important to remove any weeds or debris from the planting area.Step 3: Plant the seeds.Once the soil has been prepared, it is time to plantthe corn seeds. Corn seeds should be planted 1-2 inchesdeep and spaced 9-12 inches apart in rows that are 30-36 inches apart. This will allow the corn plants to have enough space to grow and develop.Step 4: Water the seeds.After planting the seeds, it is important to water the planting area thoroughly. Corn requires consistent moisture, especially during the germination and early growth stages.It is important to water the seeds regularly, keeping the soil moist but not waterlogged.Step 5: Fertilize the plants.As the corn plants begin to grow, it is important to fertilize them to provide the nutrients they need to thrive.A balanced fertilizer high in nitrogen is ideal for cornplants. It is important to follow the instructions on the fertilizer package and apply it at the appropriate times during the growing season.Step 6: Monitor for pests and diseases.Throughout the growing season, it is important to monitor the corn plants for pests and diseases. Commonpests that affect corn include corn earworm, cutworms, and armyworms. It is important to take appropriate measures to control these pests and prevent them from damaging the crop.Step 7: Harvest the corn.Finally, when the corn plants have reached maturity, it is time to harvest the corn. This is typically done whenthe kernels are fully developed and milky in appearance.The corn can be harvested by hand or using mechanical equipment, depending on the scale of the operation.Overall, planting corn requires careful planning, attention to detail, and regular maintenance throughout thegrowing season. By following these steps, farmers can ensure a successful corn crop that will provide a bountiful harvest.中文回答：种植玉米是一个重要而必要的过程，需要仔细的规划和细致的注意。
三百字植物作文三年级下玉米
三百字植物作文三年级下玉米Corn is an important food crop that is grown all over the world. It is also known as maize and is a staple food in many countries.玉米是一种重要的粮食作物，广泛种植在世界各地。
它也被称为玉米，是许多国家的主食。
In the field, the tall green stalks of corn sway gently in the wind, creating a peaceful and idyllic scene. The golden tassels at the top of the stalks add a touch of beauty to the landscape.在田野里，玉米长长的绿色茎杆在风中轻轻摇曳，营造出一片宁静和田园诗般的景色。
茎顶的金黄色花穗为风景增添了一抹美丽。
As the corn grows, it undergoes various growth stages, from germination to tasseling and finally to the formation of kernels. This process is a marvel of nature and a testament to the resilience and adaptability of plants.随着玉米的生长，它经历了从发芽到抽穗，最终形成颗粒的各个生长阶段。
这个过程是自然的奇迹，也证明了植物的韧性和适应能力。
Corn is not only important for humans as a food source, but it also plays a crucial role in the ecosystem. It provides habitat and food for various animals, and its deep roots help prevent soil erosion.玉米不仅对人类是重要的食物来源，而且在生态系统中扮演着至关重要的角色。
玉米生长过程作文300
玉米生长过程作文300英文回答：Corn is a widely cultivated crop that goes through a fascinating growth process. From planting to harvest, corn undergoes several stages of development.First, the farmer prepares the soil by plowing and fertilizing it. Then, the seeds are planted in rows, typically in the spring. The seeds need warmth, moisture, and nutrients to germinate. Farmers often say, "Planting corn is like planting hope."Once the seeds germinate, they begin to grow into small plants, known as seedlings. These seedlings require regular watering and protection from pests and weeds. Farmers say, "As the corn grows, so does the worry."As the seedlings continue to grow, they develop into tall stalks with leaves and tassels. The tassels producepollen, which is necessary for pollination. The phrase "knee-high by the Fourth of July" is often used to describe the ideal height of corn plants by a certain date.During pollination, the pollen from the tassels falls onto the silk, which is the female part of the plant. Each silk strand represents a potential kernel of corn. The phrase "as sweet as corn silk" is used to describe something delicate and beautiful.After successful pollination, the kernels begin to develop and fill out. The plants require plenty of sunshine and water to produce healthy ears of corn. Farmers often say, "The corn loves the rain as much as a fish loves water."As the corn matures, the husks surrounding the ears turn brown and dry. This indicates that the corn is ready for harvest. Farmers use the phrase "knee-deep in corn" to describe a bountiful harvest.Finally, the corn is harvested either by hand or withthe help of machinery. The ears are collected and stored for consumption or further processing. The phrase "corn-fed" is often used to describe something that is nourished and well-fed.中文回答：玉米是一种广泛种植的作物，经历了一个迷人的生长过程。
种植玉米的过程与步骤作文
种植玉米的过程与步骤作文英文回答：Planting corn is a process that requires careful planning and attention to detail. Here are the steps involved in planting corn:1. Choose the right location: Corn requires a lot of sunlight and well-drained soil. Choose a location in your garden or field that receives at least 6-8 hours ofsunlight per day and has soil that is rich in organic matter.2. Prepare the soil: Before planting, it's important to prepare the soil by tilling it to a depth of 8-10 inches. This will help to loosen the soil and create a good seedbed for the corn.3. Plant the seeds: Corn seeds should be planted at a depth of 1-2 inches and spaced 8-12 inches apart in rowsthat are 30-36 inches apart. This spacing allows the corn plants to have enough room to grow and develop.4. Fertilize the soil: Corn is a heavy feeder and requires a lot of nutrients to grow. Before planting, it's a good idea to fertilize the soil with a balancedfertilizer to provide the corn plants with the nutrients they need.5. Water the plants: After planting, it's important to water the corn seeds regularly, especially during the germination and early growth stages. Corn plants require about 1-1.5 inches of water per week, either from rainfall or irrigation.6. Weed control: Keep the area around the corn plants free from weeds, as weeds can compete with the corn plants for nutrients and water. Regular weeding is essential for the healthy growth of corn.7. Monitor for pests and diseases: Keep an eye out for common corn pests and diseases, such as corn earworms,armyworms, and common rust. If any issues are detected, take appropriate measures to control them.8. Harvest the corn: Depending on the variety, corn is typically ready for harvest 60-100 days after planting. Look for signs of maturity, such as dried brown silks and firm kernels, before harvesting the corn.中文回答：种植玉米是一个需要仔细规划和注意细节的过程。
研学活动种玉米作文
研学活动种玉米作文英文回答：The corn field trip was a fascinating and educational experience. We learned so much about the life cycle of corn and how it is grown. We started by visiting a corn farm where we saw the different stages of corn growth. It was amazing to see the tiny corn seeds being planted and then grow into tall stalks with ears of corn.During the trip, we also had the opportunity to participate in hands-on activities. We were able to plant our own corn seeds and learn about the proper techniquesfor planting and caring for corn. It was interesting to see how much effort and attention to detail is required to ensure a successful corn harvest.Another highlight of the trip was learning about the various uses of corn. We discovered that corn is not only used as a food source but also for making ethanol, cornsyrup, and other products. It was eye-opening to see how versatile corn can be and how it plays a significant rolein our daily lives.Overall, the corn field trip was a valuable experience that allowed us to gain a deeper understanding of the importance of corn in agriculture and our society.中文回答：玉米研学活动是一次令人着迷且富有教育意义的经历。
种玉米作文300字作文
种玉米作文300字作文英文回答：Growing corn is a very interesting and rewarding experience. I remember the first time I planted corn in my backyard. I carefully prepared the soil, planted the seeds, and watered them regularly. After a few weeks, I started to see the tiny sprouts emerging from the ground. It was such a satisfying feeling to watch the corn plants grow taller and taller each day.I also learned a lot about the different stages of corn growth. From the time the seeds germinate to when the ears of corn develop, each stage requires specific care and attention. For example, during the tasseling stage, it is important to ensure that the plants receive enough water and nutrients to support the development of the ears. I also had to watch out for pests and diseases that could harm the corn plants.As the corn plants matured, I eagerly anticipated the harvest. When the time came to pick the ears of corn, I was amazed by the abundance of fresh, juicy kernels. I enjoyed cooking and eating the corn, knowing that it was the result of my hard work and dedication.中文回答：种玉米是一件非常有趣和有回报的经历。
玉米、高粱、大豆和小麦生长时间表说明书
Pocket Guide toC1389VE VCV1V2V3R1R8R5R3SoybeanVE Emergence: cotyledons above soil surfaceVC Cotyledon: cotyledons fully expanded, unifoliate leaves unfoldedV12nd node: 1 node on main stem with fullydeveloped trifoliatesV23rd node: 3 nodes on main stem with 2 fully developed trifoliates, nodules begin forming onrootsV34th node: 4 nodes on main stem with 3 fully developed trifoliates, increased lateral rootgrowth, branching may begin at fi rst nodeV5/V66th/7th node: number of nodes plant mayproduce is set, cotyledons have fallen off,branching begins, increased lateral rootexpansion R1Beginning bloom: 1 open fl ower at any node on main stem, usually occurs at V7 to V10R2Full bloom: large number of nodules present on roots, 1 open fl ower at one of upper 2 nodes on main stemR3Beginning pod: pod 0.5 cm long at one of 4uppermost nodes on main stem, fl owers appearrapidlyR4Full pod: pod 2 cm long, rapid pod growth, beginning of seed development, fl owering at upper nodesR5Beginning seed: seed 0.3 cm long inside pod at one of 4 uppermost nodes, pod number set, seed number determined, plants very sensitive to stressR6Full seed: seed fi lls pod cavity at one of 4 uppermost nodes, seed weight approaches maximum, leavesbegin to turn yellowR7Beginning maturity: 1 pod on main stem has reached mature color, seed size is set, most seedsphysiologically mature, 50% of leaves yellowR8Full maturity: 95% of pods are mature color, leaves have dropped off, 5 to 10 days before harvest-ripeGrowth Stages of SoybeanFor solid-seeded soybeans, use the “hula-hoop method,” tossing a hoop at fi ve randomly selected locations in the fi eld. Count the number of plants within the hoop for each location and calculate an average number of plants. Multiply the number of plants by the corresponding factor to determine the number of plants per acre.average number of plants in hoop× conversion factor= number of plants per acreHoop diameter (in.)Conversion factor1824,6622118,1192413,8722710,961308,878337,337366,165For corn, sorghum, and soybean (except solid-seeded soybeans—see right),count the number of plants in a corresponding row length andmultiply by 1,000 to determine the number of plants per acre. Repeat this in multiple locations to get an average for the fi eld.Length in ftRow width (in.)for 1/1,000 A1534.82026.13017.53614.54013 Calculating Plant PopulationsFor wheat, use the following chart for number of plants per square foot, per acre, and per linearfoot of drilled row.Plants/Plants/A Plants per ft of row sq ft(millions)at spacing of6 in.7 in.8 in.9 in. 200.8710121317 24 1.0512141620 28 1.2214161923 32 1.3916192127 36 1.5718212430 40 1.7420232733Pocket Guide to Crop Development:Illustrated Growth Timelines for Corn, Sorghum, Soybean, and WheatCopyright © 2004, Board of Trustees, University of Illinois Author: Dawn Nordby, University of Illinois ExtensionSpecialist, Weed Science Integrated PestManagementCopyeditor: Molly Bentsen, Information Technology andCommunication ServicesDesigner: Krista Sunderland, Information Technology and Communication ServicesIllustrator: M. R. GreenbergIssued in furtherance of Cooperative Extension Work,Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Dennis Campion, Director, University of Illinois Extension, University of Illinois at Urbana-Champaign. University of Illinois Extension provides equal opportunities in programs and employment.Calculating Plant Populations。
玉米的生长温度
Growth Temperature of CornCorn, or maize, is a crop that requires specific temperature ranges for optimal growth and development. The growth temperature of corn varies throughout the different stages of its lifecycle.During the germination stage, when the seed is sprouting, corn requires soil temperatures of approximately 15 to 20 degrees Celsius (59 to 68 degrees Fahrenheit) for best results. Lower temperatures can delay germination, while higher temperatures can be detrimental to the seedling.As the plant grows and enters the vegetative stage, it requires warmer temperatures of about 21 to 32 degrees Celsius (70 to 90 degrees Fahrenheit) for optimal growth. This temperature range supports the rapid growth of leaves, stems, and roots.During the reproductive stage, when the corn plant produces tassels and ears, temperatures between 24 and 30 degrees Celsius (75 to 86 degrees Fahrenheit) are ideal. This temperature range promotes pollen production and pollination, as well as kernel development.It's important to note that corn is a warm-season crop and cannot tolerate freezing temperatures. Frost or freeze events can damage the plant, affecting its growth and yield potential. Therefore, it's crucial to plant corn in areas where the temperature is suitable for its growth requirements.玉米是一种需要特定温度范围来实现最佳生长和发育的作物。
玉米生长英文作文
玉米生长英文作文Title: The Growth Journey of Corn。
Corn, also known as maize, is a staple crop that playsa crucial role in various aspects of human life. Its growth journey is not only fascinating but also essential for sustaining agriculture and food security worldwide.The lifecycle of corn begins with the planting of seeds. Farmers carefully select the best quality seeds,considering factors such as genetic traits, resistance to pests and diseases, and adaptability to local environmental conditions. Once planted, corn seeds require adequate soil moisture and temperature to germinate. With the right conditions, the seeds sprout, sending out roots to anchorthe plant and shoots to reach for the sunlight.As the corn plant grows, it progresses through distinct stages of development. The seedling stage is characterized by rapid growth as the plant establishes its root systemand begins to form leaves. During this phase, it is crucial to provide sufficient nutrients, water, and sunlight to support healthy growth. As the plant matures, it enters the vegetative stage, marked by the emergence of tassels and ears. The tassels, located at the top of the plant, release pollen, while the ears develop kernels, the edible part of the corn plant.Pollination is a critical process in the corn's lifecycle, as it determines the yield and quality of the harvest. Corn is a monoecious plant, meaning it has separate male and female flowers on the same plant. The pollen from the tassels must reach the silks, the female reproductive organs, for successful pollination to occur. Factors such as wind, temperature, and humidity influence the efficiency of pollination, highlighting the intricate relationship between the corn plant and its environment.After successful pollination, the fertilized kernels begin to develop and mature. During this stage, the corn plant requires adequate water and nutrients to support kernel development. The kernels undergo a process calledgrain filling, where they accumulate starch and other nutrients, ultimately determining the size and quality of the harvest. Meanwhile, the plant continues to photosynthesize, converting sunlight into energy to sustain growth and development.As the growing season progresses, corn plants face various challenges, including pests, diseases, and adverse weather conditions. Farmers employ various strategies to protect their crops, such as integrated pest management, crop rotation, and the use of genetically modifiedvarieties with enhanced resistance traits. Additionally, advancements in agricultural technology, such as precision farming and irrigation systems, help optimize resource use and minimize environmental impact.Harvesting marks the culmination of the corn plant's growth journey. Depending on the variety and intended use, corn is harvested at different stages of maturity. For fresh consumption, sweet corn is typically harvested when the kernels are in the milk stage, whereas field corn destined for processing or animal feed is harvested whenthe kernels are fully mature. Modern harvesting equipment, such as combines, efficiently harvest and process corn, contributing to the productivity and profitability of corn farming operations.In conclusion, the growth journey of corn is a testament to the intricate interplay between the plant, the environment, and human intervention. From planting to harvest, corn undergoes a series of stages and processes, each crucial for ensuring a successful yield. As global demand for food continues to rise, understanding and optimizing the growth of staple crops like corn are essential for sustaining agriculture and food security in the years to come.。
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How a Corn Plant Develops, Special Report No. 48, Iowa State University, 1998 Grain Crops Extension, University of Kentucky
V3
Grain Crops Extension, University of Kentucky
V9
Growth rate rapidly increases. Greater demand for nutrients and water.
Ear shoot.
Ear shoot.
Ear shoot.
Growing point.
Grain Crops Extension, University of Kentucky
R1 - Silking
Silks starting to emerge.
N uptake is rapid. P uptake is rapid. K uptake is nearly complete.
Watch for corn borer feeding.
Moisture is needed for pollination.
Grain Crops Extension, University of Kentucky
V6
Premature Tassel
Grain Crops Extension, University of Kentucky
V9
Grain Crops Extension, University of Kentucky
V12
Both kernel size and kernel number are being determined.
Any limits on water or nutrients at this phase will drastically impact yields.
Earlier maturing hybrids will pass through this phase faster than later maturing hybrids.
Grain Crops Extension, University of Kentucky
R3 - Milk
Kernels are becoming yellow on the outside. Silks are dry. Kernels are at 80% moisture. Stress becomes less of a factor as kernels start to dry down.
Corn Growth Stages
Chad Lee, Ph.D. Grain Crops Extension Specialist University of Kentucky
Grain Crops Extension, University of Kentucky
/corngrows.html#stages
Grain Crops Extension, University of Kentucky
R6 – Physiological Maturity
Blacklayer
Grain Crops Extension, University of Kentucky
R6 – Physiological Maturity
Grain Crops Extension, University of Kentucky
R5 - Dent
Most of the kernels have dented on the top. Most kernels are about 55% moisture at the start of R5. A starch layer has formed and begins to progress down the kernel. A frost will stop dry matter accumulation and reduce yields.
Grain Crops Extension, University of Kentucky
R4 - Dough
Fluid in the kernel is becoming a consistency similar to dough. (70% moisture) Almost ½ of the dry weight has been accumulated. Five embryonic leaves have formed in the kernel. These will be the first five leaves of a new plant as it emerges next year.
V15
Grain Crops Extension, University of Kentucky
V15
Ear shoots near the top of the plant are starting to out-grow ear shoots lower on the plant.
Lower part of plant
Grain Crops Extension, University of Kentucky
R2 - Blister
Ear size is nearly complete. Fertilized silks are starting to dry out. An miniature corn plant has started to develop within the premature kernel.
Grain Crops Extension, University of Kentucky
R1 - Silking
Cob material
Premature kernel
Two to three days are required for all silks on an ear to be pollinated.
Grain Crops Extension, University of Kentucky
V6:
Typically when lower leaves begin to tear off of stalk.
To be certain about V-stages beyond V6:
Split the entire stalk (from the tip to the roots) in half with a knife.
Grain Crops Extension, University of Kentucky
Vegetative Stages
VE emergence V1 first leaf V2 second leaf V3 third leaf
Reproductive Stages
R1 silking R2 blister R3 milk R4 dough
Grain Crops Extension, University of Kentucky
V18
Lower part of plant
Upper part of plant
Grain Crops Extension, University of Kentucky
VT - Tassle
Occurs when last branch of tassel is visible but before silks emerge. Most susceptible to hail damage at this stage. Complete leaf loss at VT will result in little to no yield.
Grain Crops Extension, University of Kentucky
V6
Ear shoot. Growing point is above the ground.
Nodal Root System is the primary root system for nutrients and water.
V3
Growing point is below the soil surface. Frosts on the surface will not kill the plants. Freezing soil temps will kill the plant. Flooding can kill plants.
V(n) nth leaf
VT tasseling来自R5 dentR6 physiological maturity
* When staging a field of corn, each specific V or R stage is defined only when 50 percent or more of the plants in the field are in or beyond that stage.
Grain Crops Extension, University of Kentucky
VT
Grain Crops Extension, University of Kentucky
Pollen shed
Grain Crops Extension, University of Kentucky
Grain Crops Extension, University of Kentucky
About 10-12 days from silking. Entering the most critical stage for yield determination. The plant is most sensitive to water and/or nutrient stress at this stage. Irrigation- the 4 weeks around silking are the most critical.