南美白对虾具有生命力强、适应性广、抗病力强、生长迅速、出肉率高等优点，适合于集约化高密度养殖。该虾经暂养淡化能进行纯淡水养殖，近年来在淡水地区发展迅速。但由于养殖技术等各种原因，在暂养淡化期间成活率偏低，有的甚至全军覆没，损失惨重。为了探索新的暂养模式，? Penaeus vannamei has the advantages of strong vitality, wide adaptability, strong disease resistance, rapid growth and high meat yield and is suitable for intensive high-density culture. The shrimp desalination can be carried out pure freshwater aquaculture, in recent years the rapid development in fresh water. However, due to various reasons such as farming techniques, the survival rate is low during the period of temporary maintenance and desalination, and some even annihilated the entire army and suffered heavy losses. In order to explore the new mode of maintenance?