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随着有机质肥料来源的日益减少,化肥用量将不断增加。加上地膜覆盖后,带来追肥上的困难。所以,提倡化肥深施,以基肥为主代替多次追肥,不论对提高化肥的经济效益和解决劳动力的紧张状况,都将起重要作用。一、当前化肥施用中存在的问题据化肥专家认为,目前碳铵氮素的利用率只有25～30%,氨水的利用率更低。从我们公社用肥情况来看,问题也不少。一是贮存、运输过程中挥发损失。如氨水池渗漏,跑氨严重。碳铵在运输堆放中包装破损,吸潮结块,造成氮素大量损失;二是从施用情况来看,目前把氨水和碳铵用作基肥的还不普遍,用作基肥时,往往把畦头做好后施入土表,入土太浅跑氨严重。更为多数的是用水稀释后进行
With the decreasing sources of organic fertilizers, the amount of fertilizer will continue to increase. Coupled with plastic film, bring the difficulties of dressing. Therefore, to promote the deep application of fertilizers, mainly based on basal fertilizer to replace multiple topdressing, both to improve the economic efficiency of fertilizers and to solve the labor shortage, will play an important role. First, the current problems in the application of fertilizer According to fertilizer experts believe that the current utilization of ammonium bicarbonate is only 25 to 30%, ammonia utilization is lower. From our commune fertilizer situation, there are many problems. First, storage, transport loss of volatile. Such as ammonia pool leakage, run ammonia serious. Ammonium bicarbonate packaging damaged in the transport pile, moisture absorption caking, resulting in a lot of loss of nitrogen; Second, from the application point of view, the current ammonia and ammonium bicarbonate as a base fertilizer is not yet widely used as a base fertilizer, often 畦After the first well into the soil surface, soil is too shallow to run ammonia serious. The more the most is diluted with water after