The Comparison Of Culture Results And Growth Characteristics Of Eriocheir Sinensis Under Different Specifications And Densities

The author used conventional breeding methods,comparing with five kinds of crab feed on the crab ponds Diaocha Lake Hanchuan City in Hubei Province between January 2007 and November 2008.Compared with intensive culture,a better screening crab feed, and then all use the same feed,large-scale intensive culture farming,the stocking of different sizes and stocking densities and breeding effectiveness of the growth compared to find a better breeding mode.The results are as follows:Firstly,In January 2007 to September,in the breeding mode and other conditions are basically the same circumstances,the use of five kinds of crab aquaculture feed intensive culture,they were Zhengda,Jinkangda,Dahai,Shengyun and Kesheng,and the design of the control Division for breeding experiments 4 groups,Zhengda vs Jinkangda,Zhengda vs Dahai,Zhengda vs Shengyun and Zhengda vs Kesheng.The results showed that:in the breeding mode and other conditions are basically the same circumstances,the use of intensive culture Zhengda crab feed,crab develop specifications and the growth performance were higher than other brands of crab aquaculture feed,feed the culture Zhengda crab feed in one of the better feed.Secondly,in January to November 2008,the 14 breeding ponds,the stocking of different sizes and stocking densities of the culture model,agreed to adopt Zhengda feed for intensive culture,to study its effects on growth performance and culture.The results showed that:the restocking of the same specifications,develop the specifications of the crab with the increase in stocking densities decreased;crab sizes and stocking the stocking density of certain relations,crab and output specifications of the form to achieve better the effect of higher economic efficiency;experiments show that the specifications for the restocking of 5g/one,stocking density of 600 / 667m~2 culture is a good model to develop specifications for large crab for the 75g / one for the survival of higher yield rate of 48.9 percent,per-mu yield 50kg,more profitable 2802 yuan / 667m~2,the largest profit after 3112 Yuan Yuan / 667m~2.