南美白对虾精养虾池放养密度试验

在连江进行南美白对虾精养虾池放养密度试验,通过水质测定,生长测定和效益分析等方面寻找能取得最好效益的适宜放养密度。研究表明:除了溶解氧与对虾放养密度成反比外,COD、PO_4-P、NO_2-N、NO_2-N、NH_4-N等水质指标均与放养密度无关,只是随着养殖时间延长,COD、PO_4-P逐渐增加。研究还表明:放养密度与对虾的体长、体重成反比,而与饵料系数成正比。养殖结果显示:在适当的条件下,提高放养密度可以增加单位面积的产量和产值。

Experiments on culture density of Penaeus vannamei in higher place ponds

This paper reported the experiments on culture density of Penaeus vannamei in high position ponds in Lianjiang Fujian . We tried to seek suitable culture density that can gain the best benefit by determining the quality of water, measuring the body length and weight, and analyzing the benefit of cultivation. The results showed that the density of dissolve oxygen becomes the inverse ratio with culture density, the factors of water quality such as COD,PO4-P,NO2-N,NO3-N and NH4-N have nothing to do with culture density, COD and PO4-P are increasing gradually during the culture period, the density of cultivation becomes the inverse ratio with body length and weight of shrimp, but at the same time, becomes the direct ratio with feed-efficient. It showed that raising culture density could increase the output and output value of unit area under the suitable conditions.