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

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.

Citation

Xiaoguang Jiao, Wenju Liang, Lijun Chen, Yong Jiang, Dazhong Wen. Effects of urease/nitrification inhibitors on soil available N and microbial biomass N and on N uptake of wheat]. Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban. 2004 Oct;15(10):1903-6

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PMID: 15624832

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