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巢湖是长江中下游地区重要的河蟹养殖地区,2002年全市养蟹水面达到50多万亩、每年投放蟹种约3亿多只,完全依靠外购。由于苗种质量得不到保证,使养殖的经济效益大幅下跌。为探索巢湖地区优质蟹种供求之道,我们提出走蟹种本地化培育之路。五年多来,全市现已形成本地化蟹种培育基地20多个,面积4000多亩,年生产优质蟹种3000多万只。 一、材料与方法 1.蟹种池建设 (1)池塘结构 2000年我们在水源充足无污染、交通便
Chaohu Lake is an important crab breeding area in the middle and lower reaches of the Yangtze River. In 2002, the water area of crabs in the city reached more than 500,000 mu. About 300 million crabs were introduced each year, totally depending on outsourcing. As the quality of seed can not be guaranteed, so that the economic benefits of farming fell sharply. In order to explore the supply and demand of high-quality crab species in Chaohu, we propose a way to localize crabs. Over the past five years, the city has formed more than 20 localized crab breeding bases with an area of 4,000 mu and annual production of over 30 million high-quality crab species. I. Materials and Methods 1. Construction of Crab Pools (1) Pond Structure In 2000, we had sufficient water-free and pollution-free transportation