果园多施有机肥

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【正】 1.有机肥含营养成份比较全,而且肥效稳定,如人粪尿中含有机质5-10%,氮0.5—0.8%,磷0.2—0.4%;牛马粪中含有机质11.5%,氮0.45-0.58%,磷0.2—0.3%。而无机肥多数营养成分单一,长期使用,不能满足果树对多种矿质营养的需要,且破坏了元素间平衡关系,甚至引起某些元素的缺素症,而施有机肥能满足果树对各种营养元素的需要。
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