上海城郊大棚蔬菜地土壤总硝化与反硝化作用研究  

NITRIFICATION,DENITRIFICATION OF GREENHOUSE VEGETABLE SOIL IN THE SUBURB OF SHANGHAI

作　　者：柳云龙[1] 施振香[1] 卢小遮[1] 章立佳[1] 尹骏[1] 庄腾飞[1] 

机构地区：[1]上海师范大学地理系,上海200234

出　　处：《长江流域资源与环境》2011年第5期592-596,共5页Resources and Environment in the Yangtze Basin

基　　金：上海市教育委员会科研创新项目(09YZ175);闵行区自然科学研究项目(2009MHZ014);上海市教育委员会重点学科建设项目(J50402);上海师范大学重点培育学科项目(DZL801);上海师范大学校级项目(SK200729)

摘　　要：通过BaPS技术对上海城郊大棚蔬菜地土壤总硝化和反硝化作用速率进行了测定,利用因子分析对影响土壤硝化和反硝化的主要因素进行了分析,结果表明：各大棚蔬菜地土壤总硝化、反硝化速率差异性显著（p〈0.01）,其中土壤总硝化速率为177.58~457.26 Nug/kg.h,土壤反硝化速率为231.51~415 Nug/kg.h,土壤总硝化作用速率与与土壤容重呈显著性负相关（p〈0.05）,与硝态氮含量呈极显著性正相关（p〈0.01）,土壤反硝化作用与土壤含水量呈显著性正相关（p〈0.05）,与土壤有机质、硝态氮呈极显著性正相关（p〈0.01）。土壤含水量、土壤有机质含量、土壤硝态氮含量、土壤容重是影响土壤总硝化和反硝化作用的主要因素,四项指标能概括所测定全部指标包含信息的80%以上;土壤硝化作用和反硝化作用对土壤N2O排放的贡献率分别为47.5%、52.5%,土壤硝化和反硝化作用均对大棚蔬菜地土壤氮损失产生影响。Soil gross nitrification rates and denitrification rates were determined using the barometric process separation（BaPS）technique in greenhouse vegetable soils in Shanghai Suburb,and the factor analysis were used to evaluate factors affecting soil nitrification and denitrification process.The results showed that there were significant differences in soil gross nitrification rates and denitrification rates among all greenhouse vegetable soils（One-way Anova,p0.01）.Soil gross nitrification rates ranged from 177.58 to 457.26 Nug/kg·h,soil denitrification rates ranged from 231.51 to 415 Nug/kg·h.Soil gross nitrification rates were positively related to soil nitrate content（p0.05） and negatively related to soil bulk density（p0.05）.Soil gross denitrification rates were positively related to soil moisture（p0.05）,and to soil organic matter,nitrate（p0.01）.Soil moisture,soil organic matter,nitrate and soil bulk density were the important factors to affect soil nitrification and denitrification process,and these four indices indicated more than 80 percent information of all measured soil indices.Soil gross nitrification and denitrification contribution to the emission of soil N2O were 47.5%,52.5%,respectively.Both soil gross nitrification and denitrification were responsible for the nitrogen loss from greenhouse vegetable soils.

关 键 词：土壤总硝化作用 土壤反硝化作用 气压分离系统(BaPS) 大棚蔬菜 

分 类 号：X703[环境科学与工程—环境工程]