恩泰克长效稳定性肥料对玉米生长及硝酸盐淋失的影响

Effects of the Long-Lasting Stabilized Fertilizers ENTEC on Maize Growth and Nitrate Leaching

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 nitrification inhibitor and has been added in some ammonium-containing fertil- izers to reduce the transformation of ammonium to nitrate in the soil. A field experiment was carried out to investi- gate the effects of DMPP-containing fertilizer ENTEC on maize growth and nitrate leaching in alluvial soil. The re- suits showed that compared to the normal fertilizer, ENTEC application as either basal fertilizer before sowing or as side-dressing at V8 inhibited nitrification and reduced the content of nitrate in the soil, and increased the ratio of ammonium to nitrate in the soil. As a result, ENTEC fertilizer significantly promoted root growth and have no effect on the yield of maize. It is concluded that adding the nitrification inhibitors such as DMPP in the fertilizer can be a way to reduce the risk of nitrate leaching without adverse effect on maize growth.