几种新型包被尿素在淮北砂姜黑土区的肥效研究

Study on Fertilizer Efficiency of Several New Types Urea in Huaibei Vertisol.

通过新型尿素和普通尿素在小麦、玉米上各 2年的田间试验 ,结果表明 ,作为基肥一次施用 ,新型尿素不但增加了作物产量 ,而且肥料利用率也有所提高。在小麦上增产 9.55% ,氮素利用率提高1.6%— 12 .6% ;在玉米上增产 18.75% ,氮素利用率提高 4 .1%— 16.4 % ,经济效益比较明显。初步表现出具有肥效长和肥料利用率高等特点 ,有较明显的增产增收的效果。

By way of field experiments of new types urea and ordinary urea on wheat and maize two years respectively, obtained a result:new type urea of applying as base fertilizer were able to improve not only crop yield, but also fertilizer utilization efficiency. On wheat and maize, they increased yield 9.55% and 18.75% respectively, improved fertilizer utiolization efficiency 1.6%-12.6% and 4.1%-16.4% respectively. Economic benefits showed a marked increase. They displayed preliminarily a characteristic of long fertilizer efficiency and a good effect of increasing crop yield.