桑树是永续性利用资源,要获得优质高产,需要创造一个有利于桑树生长的土壤环境。而改良土壤环境的重要措施之一就是合理施肥。桑树生长每年要从土壤中吸取大量的营养元素。如一亩桑园年产桑叶1500公斤,需要从土壤中带走氮20.5公斤,磷3.6公斤,钾10.6公斤。而一般桑园土壤中的氮、磷供给量远远不能满足桑树生长需要。钾与氮、磷相比,虽然不十分缺乏,因其易淋溶流失,也会出现有效钾缺乏,所以也应注意钾肥的施用。桑树一般在土壤有机质含量1.8％以上才 Mulberry is a sustainable use of resources, to obtain high quality and yield, the need to create a conducive environment for the growth of mulberry soil. And one of the important measures to improve the soil environment is to rationally fertilize. Mulberry grows from the soil every year to absorb a large number of nutrients. For example, an acre mulberry garden produces 1500 kg of mulberry leaves annually, and takes 20.5 kg of nitrogen, 3.6 kg of phosphorus and 10.6 kg of potassium from the soil. The general mulberry soil nitrogen and phosphorus supply far can not meet the needs of mulberry growth. Potassium and nitrogen, phosphorus compared, although not very lack of leaching due to its easy to elute, there will be a lack of available potassium, it should also pay attention to the application of potash. Mulberry soil generally more than 1.8% of organic matter before