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优质桑叶是蚕种生产的基础。叶质好坏主要决定于桑园所施 N、P、K肥是否合理。目前种茧育桑园施肥 ,普遍存在重氮轻磷钾和微肥不施现象 ,影响了桑叶和蚕种制造的产量和质量。为此 ,作者于 1 994年对部分蚕种场桑园土壤进行测定 ,并结合桑树、蚕体、蚕卵等吸收营养元素特点 ,以?
High-quality mulberry leaves silkworm production is the basis. Leaf quality is mainly determined by the quality of Mulberry N, P, K fertilizer is reasonable. Currently planting cocoon mulberry fertilization, ubiquitous diazo phosphorus and potassium fertilizers do not impose the phenomenon, affecting the mulberry leaves and silkworm production and quality. To this end, the author in 1994 on part of silkworm mulberry field soil determination, combined with mulberry, silkworm, silkworm eggs and other nutrients absorbed by the characteristics of?