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近年来随着河蟹售价的提高,其增养殖越来越受到广大渔业生产者的重视,使河蟹的年产量达到200吨以上。但产量的增加主要是靠放流增殖,养殖产量却一直徘徊不前。事实表明,池塘养殖河经长时间不能发展的主要原因是没有掌握河蟹的营养特点,因而蜕皮不透,产量不高且规格小、效益低。而只有质量稳定並基本满足河蟹营养需要的配合饵料及某些特殊的养殖环境(如池塘引进水草)才能获得满意的效果。在笔者参加的鱼蟹混养高产技术研究过程中也正是
In recent years, with the increase of the price of crab, its increasing culture has been paid more and more attention by the majority of fishery producers so that the annual production of crabs can reach over 200 tons. However, the increase in production was mainly due to the proliferation of diversion and the production of aquaculture had been stagnant. The fact shows that the main reason that the pond aquaculture river can not develop for a long time is that it does not grasp the nutritional characteristics of the river crab, and therefore it does not penetrate well, the yield is not high, the specification is small, and the benefit is low. But only the quality and stability of crabs and basically meet the nutritional needs of the bait and some special breeding environment (such as the introduction of aquatic plants ponds) to get satisfactory results. In the process of polyculture and high yield of fish and crabs I participated in the process is exactly the same