三门县海泷镇园里村陈彩井1993年5月从温州购来11公斤蟹苗(规格为3000只/公斤左右),放入面积为2.5亩的养蟹池,经5个月精心养殖,即以10～16只/公斤的商品蟹出卖,总收入近5万元,扣除种苗、饵料和设施等费用1.3万元,净收入3.7万元,亩纯收入达1.48万元。陈彩井养蟹获得较好的经济效益,主要抓住了以下技术和管理环节:1.蟹池以2～3亩为宜,池底要有高低和一定坡度,池内开挖环沟,直沟和横沟以利进排水和河蟹栖息,同时池四周要有牢固的防逃、防敌害侵袭的设施. Chencaijing, Yuanli Village, Haikou Town, Haikou Town, Sanmen County In May 1993, 11 kilograms of crab seed (about 3000 / kg) was purchased from Wenzhou and put into a crab pool with an area of ​​2.5 mu. After 5 months of intensive cultivation, In order to 10-16 / kg of commercial crabs for sale, the total income of nearly 50,000 yuan, deducting seedlings, food and facilities costs 13,000 yuan, net income of 37,000 yuan, net income of 14,800 yuan per mu. Chen Caijing crabs get better economic benefits, mainly to grasp the following aspects of technology and management: 1. Crab pool to 2 to 3 acres is appropriate, the bottom of the pool there must be a certain level and slope, the trench ring trench, straight trench and Crossing the ditch to facilitate drainage and crab habitat, while the pool around to have a solid anti-flight, anti-enemy attack facilities.