论文部分内容阅读
通过模拟试验筛选出抑制NH3挥失效果较好的磷石膏∶氮肥 2∶1和 4∶1混配组合 ,并以此进行田间试验 .结果表明 ,磷石膏与氮肥混配处理可使水稻、玉米、大白菜的产量比单施等氮量尿素或碳铵增产 1 5 %～ 35 % ,统计差异达极显著水平 ,每亩净增纯收益 1 0 0元以上 ,在碱化土壤上宜用 4∶1型 ,一般土壤上则以 2∶1型的混配组合为好 .本文还讨论了施用磷石膏可能引起的农田土壤污染问题
The phosphogypsum that inhibits the volatilization of NH3 was screened through the simulation test: the 2: 1 and 4:1 nitrogen-phosphorus fertilizers were selected and the field experiments were carried out.The results showed that the mixture of phosphogypsum and nitrogen fertilizers could make rice, corn , The yield of Chinese cabbage increased 15% ~ 35% more than that of single application of nitrogenous urea or ammonium bicarbonate, the statistical difference reached extremely significant level, with a net net gain of more than 100 yuan per mu and above 4 : 1 type, the general soil is based on the 2: 1 type of combination is better.This paper also discussed the application of phosphogypsum may cause farmland soil pollution