Effects of CMP-nitrification Inhibitor on Urea-N Transformation

doi:10.7668/hbnxb.2010.S1.049

Abstract

Abstract: With aerobic incubation test,this paper studied the effects of nitrification inhibitor CMP (1-carboxamide-3-methylpyrazole) on Urea-N transformation,taking DMP(3,5-dimethylpyrazole) as reference. The results indicated that CMP could significantly inhibit the oxidation of soil ammonium. The inhibitory effect of CMP increased with its dosage. CMP showed a higher efficacy when its dosage was one third of DMP in the 40 days,but it lost its inhibitory effect on the 60th day because its nitrate concentration was higher than the control. The nitrate concentration was higher than the ammonium concentration and its apparent nitrification rate was 52. 6%. When the dosage was 0. 1% of applied urea,it could increase the soil ammonium concentration and decrease the nitrate concentration and the highest apparent nitrification rate was only 32. 6% over the period.

Key words: CMP, Nitrification inhibitor, NH₄⁺ -N, NO₃^－ -N, Apparent nitrification rate

CLC Number:

YU Ge-jie, SHI Yuan-liang, GU Hui-juan, WANG Ting-ting, WEI Zhan-bo. Effects of CMP-nitrification Inhibitor on Urea-N Transformation[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(S1): 217-219. doi: 10.7668/hbnxb.2010.S1.049.

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http://www.hbnxb.net/EN/Y2010/V25/IS1/217

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