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果园施肥,氮肥最重要。但是氮肥的施用方法很有讲究,就是说只有会施、巧施氮肥,才能取得最佳效益。 用量施氮肥最忌过量和单一化。按照果树的覆盖面积或树冠的体积确定施肥量较为适宜,结果多的树适当多施。氮肥,应以有机肥料中的氮素为主,如果补充无机氮肥,也应与有机肥混合后施入。优质圈肥、堆肥中有机氮含量丰富,加入无机氮肥,能减少氮素在土壤中的损失,根系吸收和利用的效率高。氮肥的50％—70％应当在基肥中施入。一个中等产量、全覆盖的苹果园(或桃、柑桔、葡萄园),全年施入的纯氮量应
Orchard fertilization, nitrogen fertilizer is the most important. However, the application of nitrogen fertilizer is very particular about, that is, only Shi Shi, Qiao nitrogen fertilizer, in order to obtain the best benefit. The amount of nitrogen most avoid excessive and simple. According to the coverage area of fruit trees or canopy volume to determine the amount of fertilizer is more appropriate, the results of the tree more appropriate. Nitrogen fertilizer should be based on nitrogen in organic fertilizer, if you add inorganic nitrogen fertilizer, should also be mixed with organic fertilizer applied. High-quality loop fertilizer, organic nitrogen rich in compost, adding inorganic nitrogen fertilizer, nitrogen can reduce the loss in the soil, the root absorption and utilization of high efficiency. 50% -70% of nitrogen fertilizer should be applied in the base fertilizer. A medium-yield, fully-covered apple orchard (or peach, citrus, vineyard), the amount of pure nitrogen applied throughout the year should