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脲酶/硝化抑制剂对土壤有效态氮、微生物量氮和小麦氮吸收的影响 预览 被引量:34

Effects of urease/nitrification inhibitors on soil available N and microbial biomass N and on N uptake of wheat
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摘要 研究了脲酶抑制剂(NBPT)、硝化抑制剂(DCD)及二者组合在草甸棕壤上施用对尿素态N转化及土壤总有效态N、微生物量N的影响.结果表明,尿素配施NBPT、DCD及抑制剂组合能够增加尿素水解后土壤NH+4含量2%~53%,显著降低了氧化态N的浓度,抑制了土壤中铵态N的氧化,增加土壤总有效N 34%~44%,小麦吸N量增加0.26%~6.79%,其中以脲酶抑制剂与硝化抑制剂组合的效果最明显.抑制剂施用增加了微生物在小麦生长初期对有效态N固持,有利于后期土壤有效态N的矿化. With an aquic brown earth as test soil,this paper studied the effects of urease inhibitor(NBPT),nitrification inhibitor(DCD)and their combinations on the dynamics of soil available N and microbial biomass N.The results showed that the treatments of inhibitors,especially the combined application of NBPT and DCD,could increase soil NH+ 4-N by 2%~53%,inhibit NH+ 4oxidation,decrease soil NO- 3-N concentration,increase soil total available N by 34%~44%,and increase wheat N uptake by 0.26%~6.79%.The best treatment was urease inhibitor combined with nitrification inhibitor.The application of inhibitors increased soil microbial biomass N immobilization at the early growth stage of wheat,and promoted soil N mineralization at filling stage.
作者 焦晓光 梁文举 陈利军 姜勇 闻大中 JIAO Xiaoguang 1,2,LIANG Wenju 1,2,CHEN Lijun1,JIANG Yong1,WEN Dazhong1( 1Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China; 2Graduate School of Chinese Academy of Sciences,Beijing 100039,China)
出处 《应用生态学报》 CAS CSCD 2004年第10期 1903-1906,共4页 Chinese Journal of Applied Ecology
基金 国家高技术研究发展计划(863计划),中国科学院沈阳生态开放实验站基金
关键词 脲酶抑制剂 硝化抑制剂 有效态N 微生物量N 小麦N吸收 Urease inhibitor, Nitrification inhibitor, Available N, Microbial biomass N, N uptake of wheat.
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