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(一)氮肥养鱼技术要点及注意事项1.氮素化肥虽含氮量高,但成分单一,属不完全肥料,应混施磷、钾肥,其比例为2.2∶1。淤泥较多的池塘,可不施钾肥。2.施用氮素化肥前,最好先施有机肥料作基肥,氮素肥料宜作追肥用。施用对象以鲢、鳙等滤食性鱼类为主,鲤、鲫等杂食性鱼次之,草食性鱼
(A) Nitrogen Fertilizer technical points and precautions 1. Nitrogen fertilizers, although nitrogen content is high, but the composition of a single, is not completely fertilizers, phosphorus and potassium should be mixed, the ratio of 2.2: 1. Sludge ponds, potassium can not be applied. 2 before the application of nitrogen fertilizer, it is best to apply organic fertilizer as a base fertilizer, nitrogen fertilizer should be used for dressing. The object of application was silver carp and bighead fish such as filter-feeding fish, carp and crucian followed by omnivorous fish, herbivorous fish