葡萄农田土壤呼吸时空变异性及其与土壤温湿度的关系

兰州大学学报:自然科学版,2016,52(1)/2月

Journal of Lanzhou University：Natural Sciences，2016，52(1)/February

葡萄农田土壤呼吸时空变异性及其与土壤

温湿度的关系

马婷,朱高峰,张琨,冯丽丽

兰州大学西部环境教育部重点实验室,兰州730000

摘要：2013年7-10月通过对敦煌市南湖乡境内的葡萄种植区有根、无根区域土壤呼吸进行系统

观测,分析该地土壤呼吸的时空变化特征及其与温湿度之间的关系.结果表明:葡萄在生长季的各

时期土壤呼吸速率的日变化基本为不对称的双峰型曲线,有根区土壤呼吸速率大于无根区的,且二

者日变化差异明显,可估算出根呼吸占土壤总呼吸的比例.在日尺度上,0cm土壤温度与土壤呼吸

速率相关性较好,而5cm土壤温度峰值与土壤呼吸速率峰值之间有位相差,在无根区二者滞后约

3h,有根区滞后时间较小.扩散系数和光合有效辐射显著影响土壤呼吸速率,是迟滞发生的主要原

因.土壤温湿度对有根、无根区土壤呼吸的影响有差异.估算葡萄农田土壤呼吸需考虑其距离树干

的空间差异性和迟滞现象的影响.

关键词：土壤呼吸速率;日变化;迟滞;土壤温度;土壤湿度

中图分类号：X171.59文献标识码：A文章编号：0455-2059(2016)01-0043-08

DOI:10.13885/j.issn.0455-2059.2016.01.007

Temporal-spatial variation characteristic in grapevine soil respiration

and its relationship with the soil temperature and moisture

Ma Ting,Zhu Gao-feng,Zhang Kun,Feng Li-li

Key Laboratory of Western China's Environmental Systems with the Ministry of Education,Lanzhou Univer-

sity,Lanzhou730000,China

Abstract:We took systematic observation to grapevine soil respiration of the root zone and the free root zone

in Nanhu Oasis in Dunhuang City of China from July to October in2013and analyzed the characteristics of

temporal-spatial variation of the soil respiration and its relationship with the soil temperature and moisture.The

results indicated that each period of diurnal variation curve of the soil respiration rate was characterized by

asymmetric bimodal curve in the growing season,the soil respiration rate in root zone is faster than that in free

root zone and the difference of diurnal variation in two zones is obvious.At the day timescale,the temperate at

0cm soil layer has a strong correlation with the soil respiration rate.There exists a time difference between the

peak of soil respiration rate and5cm soil temperature.The peak of the temperature lag3hours to that of soil

respiration rate of free root zone at5cm soil layer,and this lag time is longer than that to root zone.The signifi-

cant influence of diffusion coefficient and the photosynthetically active radiation to soil respiration is the main

reason of hysteresis.The soil temperature and moisture on the root/free root zone soil respiration also have dif-

ferent influence.The distance from the trunk and hysteresis should be considered when estimating grapevine

soil respiration.

Key words:soil respiration rate;diurnal variation;hysteresis;soil temperature;soil moisture

收稿日期：2014-06-27修回日期：2014-11-24

基金项目：国家自然科学基金项目(31370467,41571016);中央高校基本科研业务费专项资金项目(lzujbky-2015-136)

作者简介：朱高峰(1978-),男,山东栖霞人,副教授,博士,e-mail:zhugf@,研究方向为生态水文学,通信联系人.