It was found that dried silkworm excrement contained crude protein 15.4%, crude fat 3.88%, nitrogen-free extract 36.2%, crude fiber 19.6%, calcium 0.58%, phosphorus 0.82%, trace elements such as copper, iron and zinc, and a small amount of alkaloids, adrenocortical hormones and va.
In addition, compared with common organic fertilizer, silkworm excrement fertilizer has obvious ecological advantages:
1. Mulberry leaves are the only food source for silkworms, and silkworm excrement will not bring diseases to people and animals.
Second, the silkworm excrement organic fertilizer has no heavy metal pollution.
Three, silkworm excrement organic fertilizer does not contain organic pollutants.
Four, silkworm excrement organic fertilizer does not contain antibiotics.
5. The salt content of silkworm excrement organic fertilizer is low.
6. The PH value of silkworm excrement organic fertilizer is alkaline, which can improve acidic soil.
Seven, silkworm excrement compost aerobic fermentation temperature as high as 60-70 degrees, drug disinfection and high temperature sterilization double measures to completely inactivate and harmless silkworm excrement pathogens.
Therefore, silkworm excrement, as a fertilizer, can not only increase yield, improve crop quality, but also improve soil. In the crop fertilization system with chemical fertilizer as the main body, it can improve loose soil, improve soil hardening, promote crop rooting and supplement nutrients such as calcium and magnesium. It can significantly reduce soil acidity and soil salinity, promote the production of soil organic matter, and increase the content of soil total nitrogen and total phosphorus.
Therefore, compared with other fertilizers, silkworm excrement organic fertilizer has more obvious safety and ecological advantages than ordinary organic fertilizer. At present, silkworm excrement fertilizer products have been launched in China, and the two brands of Guangdong Plant Dragon Company, Shangcanli and Youdi, are very good.