池养青虾的高产技术

HIGH YIELD TECHNIQUE OF MAROBRACHIUM NIPPONENSE IN POND-CULTURE

按青虾摄食、栖息生态习性设计池塘青虾养殖工艺，养殖实践表明：①采用虾苗一次放养，每1000m2池塘面积投放4．5～7．5万尾虾苗，饲养期间采用适时分期分批捕捞的方法，青虾养殖池塘每1000m2净产为90～150kg，其中60％～70％的商品虾规格可达2．0～2．5g以上。②采用一年二茬养殖青虾的方式，每1000m2净产可达204．3kg左右，但操作较为复杂。③青虾高产养殖池塘以面积667～2000m2、水深1．0m左右的长条形土地为宜；池堤水下0，5m处应设置宽为0．5～1．0m的平台；养虾池中要求设置适量的水生植物条带作青虾栖息台。④青虾用人工配合饲料的粗蛋白含量可按35％～40％配制，饲养期间日投饵2次，日投饵率一般为2．8％～8％。本研究试图通过创造较佳的青虾养殖生态环境条件，改变传统的养殖工艺，提高池塘养殖青虾的技术水平。

According to feeding and habitat ecology the technical process of Macrobrachium nipponense culture was designed. By the cultivating practice the following resultswere recorded: (1) The production of M. nipponense was 90 - 105kg/1000m2, the prawns(2.0- 2. 5g/ind) had 60-70%, when one time breeding prawn fry, much times catchingprawns per year. (2) The yield of M. nipponense was 204kg/1000m2, when two tirnes breeding fry, two times catching prawns, but it was too miscellaneous. (3) It is nice that the fishpond was rectangle, 667- 2000m2 culture area, 1.0m depth of water per pond. (4) It is goodthat the protein in diets of M. nipponense was 35-40%, two times exchange water per day,the ratio of feeding was 2. 8-8.0%.