Influences of nitrification inhibitor 3,4-dimethyl pyrazole phosphateon nitrogen and soil salt-ion leaching
YU Qiaogang , YE Xuezhu , CHEN Yingxu , ZHANG Zhijian , TIAN Guangming
DOI:
Received May 09, 2007,Revised October 11, 2007, Accepted , Available online
Volume 20,2008,Pages 304-308
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An undisturbed heavy clay soil column experiment was conducted to examine the influence of the new nitrification inhibitor, 3,4-
dimethylpyrazole phosphate (DMPP), on nitrogen and soil salt-ion leaching. Regular urea was selected as the nitrogen source in the
soil. The results showed that the cumulative leaching losses of soil nitrate-N under the treatment of urea with DMPP were from 57.5%
to 63.3% lower than those of the treatment of urea without DMPP. The use of nitrification inhibitors as nitrate leaching retardants may
be a proposal in regulations to prevent groundwater contaminant. However, there were no great di erence between urea and urea with
DMPP treatments on ammonium-N leaching. Moreover, the soil salt-ion leaching losses of Ca2+, Mg2+, K+, and Na+ were reduced
from 26.6% to 28.8%, 21.3% to 27.8%, 33.3% to 35.5%, and 21.7% to 32.1%, respectively. So, the leaching losses of soil salt-ion
were declined for nitrification inhibitor DMPP addition, being beneficial to shallow groundwater protection and growth of crop. These
results indicated the possibility of ammonium or ammonium producing compounds using nitrification inhibitor DMPP to control the
nitrate and nutrient cation leaching losses, minimizing the risk of nitrate pollution in shallow groundwater.
