种茧育桑园氮磷钾施肥最佳配方的试验 1.春季不同施肥比例对桑叶产、质量的影响

The Experiment on Fertilization of NPK Ratio for the Mulberry Field for Parent Egg Production 1. The Effect of Different NPK Ratio of Fertilization on Spring Leaves Proportion and Quality

试验在其它桑园管理措施一致的前提下,改变其N、P2O5、K2O肥的施用比例,并对桑叶产、质量进行了调查。结果是N∶P2O5∶K2O=10∶5∶5的施肥比例,能显著提高生长芽生长量,极显著提高春叶产量;适当提高种茧4龄起蚕结茧率和虫蛹统一生命率。显著提高全茧量及茧层量。极显著提高卵质成绩及下代孵化率。

The experiment was conducted that changing the N, P2O5, K2O ratio of fertilizer application, and the survey of mulberry leaf yield and quality. The results were N：P2O5：K2O=10：5：5 ratio of fertilizer application could significantly enhance the growth of shoots, significantly enhance leaf production in spring crop; appropriate improve cocooning rate of 4th instar, larva-pupae survival rate, significantly enhance cocoon weight and cocoon shell weight, significantly improve egg quality score and hatching rate of the next generation.