期刊论文

中文

环境化学

0254-6108

2009

28

2

177-180

10.3321/j.issn:0254-6108.2009.02.004

国家自然科学基金（30770389）资助项目；

本校为第一机构

通过室内模拟研究了4种尿素(普通尿素、保水型控释尿素、德国缓释尿素、矿物改性包膜尿素)施入土壤后pH值的变化和氨气释放的差异.结果表明,施入德国缓释尿素pH值下降速度最慢,但氨气挥发量最多,五周内在冲积菜园土中为25.65%,红菜园土中为16.68%.施入矿物改性包膜尿素pH值下降最快,但氨气挥发量最少,五周内在冲积菜园土中为8.07%,红菜园土为5.19%.这是由于德国缓释尿素中含有双氰胺(DCD),抑制硝化反应,因此,pH值下降缓慢,氨气挥发量大.矿物改性包膜尿素外层为磷矿粉,能缓解尿素的溶解,降低氮的释放,减少氨气挥发.

This paper studied about change of pH and volatilization of ammonia by fertilizing four different types of urea （ general urea, keep water controlled-release urea, Germany slow-release urea, mineral coated urea） . The results showed that the fallen rate of pH by Germany slow-release urea was the slowest while the amount of ammonia volatilization was the biggest, in the five weeks the amount was 25.65 % in alluvial vegetable garden soil, 16.68% in red vegetable garden soil. The fallen rate of pH by fertilizing mineral coated urea was the faste...