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对虾幼苗暂养技术,提倡推广了几年,但全国各地做法不一。前些年,由于育苗单位普遍采用水体法销售虾苗,误差较大,往往造成苗量不足。又由于出售的虾苗个体较小,体弱（体长0.7厘米）、成活率低下。所以,养成池中确实成活的虾苗数量难以估计。这样给科学准确按数投饵造成困难。投饵过多,不但浪费饵料,提高养虾成本,而且残饵过多,污染池底,败坏水质,影响对虾生长,并易导致病害发生。投饵少了,造成对虾食量不足,不但影响
Prawn seedling holding technology, to promote the promotion of a few years, but different practices throughout the country. A few years ago, due to the widespread use of water law nursery units sales of shrimp, the larger the error, often resulting in insufficient seedlings. And because the individual sold shrimp smaller, frail (body length 0.7 cm), survival rate is low. Therefore, it is difficult to estimate the number of shrimp seedlings that actually survive in the pond. This makes it difficult for science to accurately feed by number. Excessive feeding, not only waste food, raising the cost of shrimp, but also excessive bait, polluting the bottom, corrupt water quality, affect shrimp growth, and easily lead to disease. Less feeding, resulting in insufficient food intake, not only affect