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DMPP是一种新型硝化抑制剂,添加到含铵肥料中具有抑制铵态氮向硝态氮转化的作用。本文在冲积土条件下,研究了含有DMPP的恩泰克肥料对玉米生长及土壤系统中硝态氮淋失的影响。结果表明,与普通复合肥相比,播前基施或八叶期追施恩泰克长效稳定性肥料均能抑制硝化作用,降低土壤硝态氮的含量,提高铵态氮与硝态氮的比值。结果能显著促进玉米根的生长,对玉米产量没有影响。本研究认为,在肥料中添加硝化抑制剂DMPP,能在不影响玉米生长的前提下降低硝酸盐淋失的风险。
DMPP is a new type of nitrification inhibitor added to the ammonium-containing fertilizer to inhibit the conversion of ammonium nitrogen to nitrate nitrogen. In alluvial soil, we studied the effect of Entek fertilizer containing DMPP on the growth of maize and nitrate leaching in soil. The results showed that compared with conventional compound fertilizers, the long-term and stable fertilizers at sowing stage or eight-leaf stage all inhibited the nitrification, reduced the contents of nitrate nitrogen in soil and increased the contents of ammonium nitrogen and nitrate nitrogen ratio. The results can significantly promote the growth of maize roots and have no effect on maize yield. This study suggests that the addition of nitrification inhibitor DMPP to fertilizer can reduce the risk of nitrate leaching without affecting the growth of maize.