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东沟县对虾养殖业,前几年有很大发展,一直保持全国县级产量领先地位。但是,近年来出现了令人担忧的问题,主要是单产降低,规格减小。1987年全县平均亩产虾110公斤,12厘米以上的占50%;1988年全县平均亩产仅99公斤,12厘米以上的占30%.其主要原因之一是对虾大面积出现烂鳃病,造成虾群死亡或减产。对虾烂鳃病是由于细菌感染所致,其原因大致有以下几个方面。一是东沟县大部分虾池已经使用多年,清淤不及时,不彻底,造成池底污染。二是投喂变质或不合格饵料,沉积池底,腐败变质。三是部分虾池技术管理失控,虾民盲目追求高产,放苗密度过高,虾池超负荷使用,又缺乏活水交换能力,破坏了对虾正常生活生长环境,加之饵料投喂过量,造成虾池污染,给细菌的生长漫延创造了条件。四是有些虾池养殖工程不甚合理,水系不配套.
Donggou shrimp farming industry, a few years have great development, has maintained a leading position in the county-level production. However, worrisome issues have emerged in recent years, mainly due to the reduced yield and the reduced specifications. In 1987, the average yield per mu of shrimp in the county was 110 kg, accounting for 50% of the total cultivated area of 12 centimeters or more. In 1988, the average yield per mu was 99 kg in the county and 30% in 12 cm or more. One of the main reasons was that shrimp Disease, resulting in death or reduced shrimp production. Shrimp rotten gill disease is due to bacterial infection, the reasons are generally the following aspects. First, most of Donggou shrimp pond has been used for many years, dredging is not timely, not thorough, resulting in bottom pollution. Second, fed metamorphosis or unqualified food, sediment bottom, spoilage. Third, part of the technical management of shrimp pond out of control, shrimp blind pursuit of high-yield blind, high density of Shimiao, shrimp pond overload, lack of living water exchange capacity, undermining the normal living environment for shrimp growth, coupled with excessive feeding of food, resulting shrimp pond Pollution, to the proliferation of bacteria created the conditions for the growth. Fourth, some shrimp ponds breeding project is not reasonable, the water is not complete.