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

应用生态学报 ›› 2004, Vol. ›› Issue (10): 1903-1906.

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

焦晓光^1,2, 梁文举^1,2, 陈利军¹, 姜勇¹, 闻大中¹

1. 中国科学院沈阳应用生态研究所, 沈阳 110016;
2. 中国科学院研究生院, 北京 100039

收稿日期:2003-12-31 修回日期:2004-03-30 出版日期:2004-10-15
通讯作者: 梁文举
基金资助:
国家“863”计划项目(2004AA246020);中国科学院沈阳生态实验站基金资助项目(SYZ0204)

Effects of urease/nitrification inhibitors on soil available N and microbial biomass N and on N uptake of wheat

JIAO Xiaoguang^1,2, LIANG Wenju^1,2, CHEN Lijun¹, JIANG Yong¹, WEN Dazhong¹

1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Received:2003-12-31 Revised:2004-03-30 Online:2004-10-15

摘要/Abstract

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NH₄⁺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.

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

Abstract: 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 NH₄⁺-N by 2%～53%,inhibit NH₄⁺ oxidation,decrease soil NO₃^--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.

Key words: Urease inhibitor, Nitrification inhibitor, Available N, Microbial biomass N, N uptake of wheat

中图分类号:

S143.1

焦晓光, 梁文举, 陈利军, 姜勇, 闻大中. 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[J]. 应用生态学报, 2004, (10): 1903-1906.

JIAO Xiaoguang, LIANG Wenju, CHEN Lijun, JIANG Yong, WEN Dazhong. Effects of urease/nitrification inhibitors on soil available N and microbial biomass N and on N uptake of wheat[J]. Chinese Journal of Applied Ecology, 2004, (10): 1903-1906.

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