生物质炭对砖红壤性质与养分及硝化作用的影响

合集下载
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

农业资源与环境学报

2016年1月·第33卷·第1期:55-59January2016·Vol.33·No.1:55-59

Journal of Agricultural Resources and Environment

硝化作用是土壤氮转化的重要环节,决定着土壤中氮素损失途径,是造成氮素大气及水体环境污染的重要原因[1-2]。硝化作用进行速度及程度受到诸如土壤

pH值、水分、温度、有效磷、有机质等诸多土壤性质的综合影响[3]。生物质炭是在厌氧或绝氧条件下对生物材料进行裂解,产生的含碳丰富的固体物质[4],因其带有的碱性物质、丰富的养分及特殊的孔隙结构等而在土壤改良,尤其是酸性土壤改良方面具有极大的潜力[5-6]。生物质炭施入土壤,能显著改变与硝化作用密切相关的土壤性质,如提高土壤pH值,增加土壤有机质、有效氮、速效磷及速效钾含量[7-8]。

海南地处热带,丰富的水热资源使土壤矿物分解彻底,物质淋溶强烈,形成既酸又瘦且保肥力低的砖

生物质炭对砖红壤性质与养分及硝化作用的影响

张垚1,索龙1,潘凤娥1,胡俊鹏1,苗运彩1,朱柏菁1,沈群力1,何秋香2*

(1.海南大学农学院,海南海口570228;2.海南大学园艺园林学院,海南海口570228)

摘要:土壤性质制约着作为氮转化重要环节的硝化作用,生物质炭显著影响与硝化作用密切相关的土壤性质,可能对硝化作用产生影响。本文利用培养试验研究生物质炭对砖红壤性质及硝化作用的影响。试验设生物质炭+淹水、生物质炭+75%田间持水量、空白+淹水及空白+75%田间持水量4个处理。研究表明,生物质炭能显著提高土壤pH值和有机碳含量以及N、P、K养分元素的有效性。水分条件差异影响生物质炭的作用效果,淹水更利于提高砖红壤的pH值,但显著降低了磷的有效性。添加生物质炭后,土壤硝化作用进程加速,硝化彻底。在利用生物质炭改良砖红壤时,应根据土壤改良目的调整土壤水分,以防硝态氮淋失风险和氨挥发的可能。

关键词:生物质炭;土壤性质;硝化作用;砖红壤

中图分类号:S156.6文献标志码:A文章编号:2095-6819(2016)01-0055-05doi:10.13254/j.jare.2015.0165

引用格式:

张垚,索龙,潘凤娥,等.生物质炭对砖红壤性质与养分及硝化作用的影响[J].农业资源与环境学报,2016,33(1):55-59.

ZHANG Yao,SUO Long,PAN Feng-e,et al.Effects of Biochar Application on Soil Physical Properties,Nutrients and Nitrification in Latosol[J].Journal of Agricultural Resources and Environment,2016,33(1):55-59.

Effects of Biochar Application on Soil Physical Properties,Nutrients and Nitrification in Latosol ZHANG Yao1,SUO Long1,PAN Feng-e1,HU Jun-peng1,MIAO Yun-cai1,ZHU Bai-jing1,SHEN Qun-li1,HE Qiu-xiang2*

(1.College of Agronomy,Hainan University,Haikou570228,China;2.College of Horticulture and Landscape Architecture,Hainan Univer-sity,Haikou570228,China)

Abstract:Nitrification process,an important link of N transformation,is restricted by the soil properties.Biochar can significantly change the soil characteristics which are closely related to the nitrification,so application of biochar to soil will influence the nitrification process.Incu-bation experiments were arranged to study the effects of biochar applicaiton on soil properties and nitrification process in latosol.The incuba-tion experiment involved with4treatments of two levels of soil water content(75%of field capacity and waterlogging)and two levels of biochar (application and zero).The results showed that the biochar significantly increased soil pH,organic carbon content and the available content of N,P and K.The effects of soil moisture could change the influence of biochar on soil characteristics.Flooding was more conducive to in-crease value of pH,but significantly reduced the content of available P.Addition of biocar to soil accelerated the nitrification rate and most NH4+was nitrified to NO3-.Soil moisture should be adjusted to the soil improvement goals to prevent nitrate leaching risk and the possibility of ammonia volatilization,when biochar was used for modifying latosol.

Keywords:biochar;soil property;nitrification;latosol

收稿日期:2015-07-02

基金项目:国家自然科学基金项目(41261063);海南省自然科学基金

项目(314046)

作者简介:张垚(1993—),云南腾冲人,本科生,研究方向为热带土

壤改良。

*通信作者:何秋香E-mail:121988267@

相关文档
最新文档