Abstract: Three factors contributing to the increase of cocoon output are: the cocoon output per box, the area of mulberry field, and the egg amount raised per unit area of mulberry field. These three main factors were analyzed based on the statistical data on cocoon output collected in Zhejiang Province from 1963 to 1998, and the proportions of the contribution to the increase of cocoon output were calculated by the factorization method. The results showed that the importance of the factors in increasing cocoon output was in the order: egg amount raised per unit area of mulberry field > cocoon output per box > area of mulberry field.

Key words: cocoon output increase, factors contributing to cocoon output

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