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一、大规格河蟹高效生态养殖模式与合理放养技术1.提早放养扣蟹,以延长养殖周期。这是生产大规格商品蟹的重要措施之一。应尽量提早放养扣蟹,一般水温稳定在10℃以上,即可放养扣蟹。2.放养优质、大规格蟹种。放养优质、大规格扣蟹是大规格商品蟹养殖的物质基础,也是提高河蟹养殖规格的重要措施之一。放养的扣蟹,要求种质纯正,符合河蟹种质标准要求:规格为6g~15g/尾;体质健壮、附肢完整、爬行活跃、行动敏捷、无病无伤、无畸形、身上无附着物、手抓松开后立即四散逃
First, the large-scale crab efficient ecological breeding mode and reasonable stocking technology 1. Early stocking deduction crab, in order to extend the breeding cycle. This is one of the important measures to produce large-size commodity crabs. Should be early stocking deduction crab, the general water temperature stable above 10 ℃, you can stocking deduction crab. 2. stocking high quality, large size crab species. Stocking quality, large-size deduction crab is a large-scale commodity crab breeding material basis, but also improve the specifications of crab farming one of the important measures. Stocking buckle crab, requiring pure germplasm, in line with the standard requirements of crab germplasm: specifications for the 6g ~ 15g / tail; physique robust, complete appendages, active crawling, quick action, no disease without injury, no deformity, no attachment , Grabbed immediately after the release of loose escape