一、提高氮把利用率 (一)防止氮肥的损失。氮肥损失的主要途径是氨态氮的挥发,硝态氮的淋失及反硝化作用的脱氮。 1.氮肥深施厚覆土是防止氮挥发的好办法。碳铵、尿素是易挥发的氮肥。在施用中如果深施厚覆土,就可以减少氮的挥发损失。 2.由于硝态氮易随水流失或淋至还原层(水田),在反硝化细菌的 First, to improve nitrogen utilization (A) to prevent the loss of nitrogen. The main ways of nitrogen loss are ammonia nitrogen volatilization, nitrate leaching and denitrification. 1. Deep application of nitrogen fertilizer is a good way to prevent nitrogen volatilization. Ammonium bicarbonate, urea is a volatile nitrogen fertilizer. If the application of deep thick soil cover, you can reduce the loss of nitrogen volatilization. 2. Because nitrate is easy to drain with water or to the reducing layer (paddy field), in denitrifying bacteria