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采用新法—昼夜按温投饵的方法来延长鱼的生长期,克服北方地区生长期短的缺点,培育出大规格的鱼种,提高经济效益。
Adopting the new method - the method of feeding fish by day and night to prolong the growth period of fish, overcoming shortcomings of short growing season in northern China, breeding large-sized fish species and improving economic benefits.