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采用系统分离育种方法，对柞蚕全茧重和生命力两项主要指标进行平衡选择。
In separating breeding, two major indicators, cocoon weight and vitality of tussah were selected.
的硫酸锌喷洒桑叶用来饲蚕，可以提高蚕体血液中氨基酸总量，增加全茧量、茧层量和茧层率；提高成虫的授精率及产卵量。
The results of silkworm feeding trial show that zinc can enhance the growth of silkworm and increase the amount of amino acid in the blood of worm.
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