桑树枝条及蚕粪是蚕桑业的主要副产品,以浙江省为例,每年生产的桑树枝条折干物量达60余万ｔ,养蚕中生产的蚕粪折干物量10万ｔ。这些富含养分的物料一直被用作燃料或肥料。经测定,枝条干物质中含粗蛋白14.0%、全糖10.5%、粗脂肪2.0%、铁0.41%、钾045%;蚕粪干物质中含粗蛋白13.47 Mulberry branches and silkworm excrement are the main byproducts of sericulture. Taking Zhejiang Province as an example, the annual dry matter weight of mulberry branches produced is more than 600,000 tons. The silkworm excrement produced in silkworm breeding is 100,000 tons. These nutrient-rich materials have been used as fuel or fertilizer. It was determined that the dry matter contained 14.0% of crude protein, 10.5% of total sugar, 2.0% of crude fat, 0.41% of iron and 045% of potassium, and dry matter of silkworm excrement contained 13.47