【摘要】 为探明有机无机肥配施及其与硝化抑制剂配合施用对菜园生态系统氮素的吸收利用和迁移转化的影响,采用田间小区试验,对小白菜—土壤生态系统硝酸盐污染状况进行了较系统的研究。结果表明,有机无机肥配施及配合施用硝化抑制剂HQ、DCD和TU均不同程度地降低小白菜硝酸盐和亚硝酸盐的含量。减少耕层土壤中硝酸盐的积累,提高耕层土壤中铵态氮的含量。更多还原

【Abstract】 To determine the inhibiting effects of combined application of organic manures with inorganic fertilizers and combined application of organic manures with inorganic fertilizers and nitrification inhibitors on accumulation of nitrate and nitrites in vegetable plants,the red garden soil developed from the Quaternary red clay and the field plot experiment were carried out to study the pollution conditions of nitrate in garden soil ecosystem.The results showed that the combined application of organic manures with inorganic fertilizers and nitrification inhibitors(HQ,DCD and TU) all can reduce the contents of nitrate and nitrites in pakchoi at different levels,while obviously increase the contents of Vc and soluble sugar in pakchoi,therefore,it is an effective techniques for producing quality and high-yield vegetables.NO3-and NH4+ can be adsorbed and maintained by the tested soil to some degree,and NO3-leaching was discovered in soil profile,but non-pollution caused to groundwater.更多还原