The Preliminary Study on Polyculture Model of Macrobrachium rosenbergii and Alosa sapidissima under Greenhouse Pond

Abstract

[目的]探索研究在温棚池塘罗氏沼虾养殖模式下开展美国鲥鱼混养的效果。选取3个温棚池塘，其中T1和T2对照池塘单养罗氏沼虾(放养密度4万尾/亩)，T3试验塘放养相同密度罗氏沼虾，并混养美国鲥鱼苗种6000尾/亩。总养殖时间210天，其中混养期135天。[结果]结果发现，混养模式下罗氏沼虾的存活率、起捕规格和亩均产量比单养模式池塘平均值分别提高4.3%，17.3%和22.4%，而饲料系数则是最低值。美国鲥鱼幼鱼的存活率和特定生长率分别为95.5%和3.54%/day，亩均产量达到399.2 kg。T3试验塘罗氏沼虾亩均利润最高，达到0.99万元。[结论]本试验表明通过温棚池塘养殖开展罗氏沼虾和美国鲥鱼混养模式具有可行性。 (Objective) The present study was conducted to explore the effects of polyculture model of Macro-brachium rosenbergii and Alosa sapidissima under greenhouse pond. (Method) Three ponds were stocked 40 thousands per 666 m2 of M. rosenbergii respectively (T1 - T3), and 6 thousands per 666 m2 of A. sapidissima were cultured in T3 pond as polyculture test group. The total feeding trial lasted 210 days, and 135 days were polyculture. (Result) The results showed that the survival rate (SR), final body weight and average product of M. rosenbergii in T3 pond increased with 4.3%, 17.3% and 22.4% than those of mean data in T1 and T2 ponds, respectively , while the lowest feed con-version rate (FCR) was found in T3 pond. The SR and the specific growth rate of A. sapidissima in T3 pond were 95.5% and 3.54%/day, and the average product was 399.2 kg per 666 m2. The highest output profit of M. rosenbergii (9.9 thousands per 666 m2) was also observed in T3 pond. (Conclu-sion) The results generated from the current study suggested that the polyculture model of M. ros-enbergii and A. sapidissima under greenhouse pond was practicable.