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1.未腐熟的农家肥和饼肥不宜直接使用。应先将农家肥和饼肥充分堆沤腐熟,经高温消毒或药剂处理后再使用。2.含氯的化肥不宜使用在盐碱地和忌氯作物上。忌氯作物有烟草、水果、甜菜、薯类、西瓜等。3.氮素化肥不宜浅施或浇水前施用。氮素化肥施入土壤后一般要转化为铵态氮,容易随水流失或受光热作用而挥发,失去肥效。4.铵态氮肥不宜与草木灰等碱性肥料混合使用。5.氮肥不宜多施于豆科作物上。豆科作物根部都有固氮根瘤菌,过多施用氮素肥料,不仅会造成浪费,还会使作物贪青晚熟,影响产量。
1. Not rotten manure and cake fertilizer should not be used directly. Should be the first manure and cake fertilizer heap full maturity, after high temperature disinfection or pharmaceutical treatment before use. 2. Chlorine-containing fertilizers should not be used in saline-alkali and avoid chlorine crops. Avoid chlorine crops have tobacco, fruit, sugar beet, potato, watermelon and so on. 3. Nitrogen fertilizer should not be applied as shallow or watering before. Nitrogen fertilizer generally applied to the soil into ammonium nitrogen, easily lost or affected by water loss and volatilization, loss of efficiency. 4. Ammonium nitrogen fertilizer should not be mixed with alkaline ash and other fertilizers. 5. Nitrogen should not be applied to more leguminous crops. Leguminous crops have nitrogen-fixing rhizobia at the root, too much nitrogen fertilizer application, not only will cause waste, but also make the crop greed green late, affecting the yield.