大黄鱼与三疣梭子蟹池塘混养技术研究

研究了大黄鱼与三疣梭子蟹的池塘混养技术。2011年4月初向池塘内投放80~100 g/尾的大黄鱼,混养池塘投放4 000~5 000尾/hm~2,共投放4 500尾/hm~2,5月下旬投放规格为150~200只/kg的三疣梭子蟹,混养池塘投放30 000只/hm~2,共投放33 000只/hm~2,梭子蟹单养池塘60 000只/hm~2,共投放66 000只/hm~2。大黄鱼单养池塘投放8 000~10 000尾/hm~2,共投放9 000尾/hm~2;当年11月中下旬收获商品大黄鱼,大黄鱼单养池塘平均单产2 118.7~2 238.7 kg/hm~2,混养池塘1 329.6~1 460.3 kg/hm~2,存活率分别为76.2%和85.3%;9~11月收获商品梭子蟹,梭子蟹单养池塘的平均单产1 701.8~1 747.1 kg/hm~2,混养池塘的平均单产为1 253.5~1 314.3kg/hm~2,存活率分别为17.8%和21.3%。混养、大黄鱼单养、梭子蟹单养投入产出比分别为1∶1.83~1∶1.96、1∶1.69~1∶1.81、1∶1.57~1∶1.76。由此可见,大黄鱼与三疣梭子蟹的混养有助于提高综合效益。

The Technical Study on the Pond Mixed Culture between Pseudosciaena crocea and Portunus trituberculatus

The pond mixed culture between P.crocea and P.trituberculatus was studied in this paper.In early April of 2011,80-100 g/ind.of P.crocea was put in the pond, and there were 4 000-5 000 ind./hm2 of P.crocea in polycultive pond, a total of 4 500 ind./hm2 .In last dekad of May, 150-200 ind./kg of P.trituberculatus was put in the pond, and there were 30 000 ind./hm2 of P.trituberculatus in polycultive pond, a total of 33 000 ind./hm2 .There were 60 000 ind./hm2 of P.trituberculatus in monocultive pond, a total of 66 000 ind./hm2 , while there were 8 000-10 000 ind./hm2 of P.crocea in monocultive pond, a total of 9 000 ind./hm2 .In late November of the same year, the adult fish was har-vested, the monocultive production reached 2 118.7-2 238.7 kg/hm2 and the polycultive production was 1 329.6-1 460.3 kg/hm2 for adult P. crocea.Their survival rates were 76.2% and 85.3% respectively.From September to November, the adult crab was harvested, the monocultive production reached 1 701.8-1 747.1 kg/hm2 and the polycultive production was 1 253.5-1 314.3 kg/hm2 for adult P.trituberculatus.Their survival rates were 17.8% and 21.3%respectively.The input-output ratios were 1∶1.83-1∶1.96 of polyculture, 1∶1.69-1∶1.81 of P.cro-cea monoculture and 1∶1.57-1∶1.76 of P.trituberculatus monoculture.It was clear that polyculture of P.crocea and P.trituberculatus was con-ducive to improving integrated benefit.