影响南美白对虾产量的主要因素是成活率，而据我们调查，不同养殖户的养殖成活率差异很大，有的可达９０％以上，有的则不到５％。经过２年的调查分析，我们认为影响南美白对虾养殖成活率的关键因素可以归纳为以下几点：１．放养规格实践证明，放养规格小于１cm的虾苗成活率普 The main factor that affects the production of P. vannamei is the survival rate. According to our survey, the survival rates of farmed farmers vary greatly, some of which may reach more than 90%, while others less than 5%. After 2 years of investigation and analysis, we think the key factors affecting the survival rate of Penaeus vannamei can be summarized as follows: 1. Stocking specifications Practice has proved that stocking specifications less than 1cm survival rate of shrimp general