施氮后氨的挥发损失及其对草坪草生长的影响

在多年生黑麦草草坪施用速效与缓效氮肥后,对氨的挥发损失进行田间定位测定。结果表明,占施入量0.77%～20.7%的氮以 NH3的形式挥发。氮肥种类不同,挥发动态各异,损失量之间差异显著。在供试的5种氮肥中,氮素损失率的顺序为:普通尿素 >塑膜包衣尿素 >国产草坪专用肥 >IBDU草坪肥 >日本包膜缓释肥。缓效性能越好,氨的挥发损失越少,缓释氮肥不但显著降低氨的挥发,而且能持久高效地保持草坪质量。

Studies on the Ammonia Volatilization from Perennial Ryegrass Turf after Fertilization

Ammonia volatilization was estimated in the field from perennial ryegrass turf after application of five kinds of N fertilizer.Ammonia losses are ranged from 0 77% to 20 78% of the applied N when fertilizers were broadcasted to the turf.The dynamics of loss NH 3 by volatilization and cumulative losses were measured in this research showing significant difference: urea>polymer coated urea>specialized turf fertilizer>IBDU>Japan polymer coated fertilizer.The results of this research indicated that slow release N fertilizer could considerably reduce the N volatilized losses from turf and the nitrogen was slower released from fertilizer,and is the less NH 3 volatilized.