Abstract:

In this study, ‘Qiangsang No.1’ mulberry tree was used as a test material, and five different concentrations of Ginkgo biloba exocarp extracts treatment (A-E: 2.5, 5.0, 10.0, 15.0, 20.0 g/L) and one blank control treatment CK were set up by field foliar fertilization test. The effects of different treatments on physiological and biochemical indexes of mulberry leaves were analyzed. Further, the processed mulberry leaves were used to feed the silkworm, and the effect of the treated mulberry leaves on the quality of the silkworm pupa was analyzed. The results showed that the branch length, leaf length, net photosynthetic rate, mulberry leaf yield, total carbon content, total phosphorus content, soluble sugar content and soluble protein content of mulberry trees reached the maximum at treatment C. Compared with the control, they increased by 20.12%, 24.71%, 18.37%, 32.99%, 20.69%, 21.00%, 24.88% and 42.82%, respectively. The leaf width, leaf area and total nitrogen content of mulberry leaves reach the maximum at treatment D. Compared with the control, they increased by 19.87%, 45.06% and 19.55%, respectively. The cocoon weight, cocoon shell weight, cocoon shell rate reached the maximum at treatment C, which increased by 11.64%, 25.64% and 11.42%, respectively. The processing order based on the comprehensive evaluation of the membership function was C>D>E>B>A>CK, among them, treatment C (10 g/L) had the best effect on the growth of mulberry branches, the yield and quality of mulberry leaves, and the quality and quality of silkworm cocoons. In summary, appropriate concentration of Ginkgo biloba exocarp extracts treatment can significantly promote the growth of mulberry branches, improve mulberry yield and quality, and the yield and quality of silkworm cocoons obtained by feeding with treated mulberry leaves are also increased accordingly.

Key words: Ginkgo biloba exocarp extracts, mulberry, cocoon, leaf yield, leaf quality