放养密度和投饲率对南美白对虾单产的影响

The effects of stocking density and feeding rate on the yield of Penaeus vannamei

为了提高养殖南美白对虾的单产水平,采用梯度设计法和回归分析法研究了放养密度和日投饲率对养殖南美白对虾单产的影响。结果表明,新疆北疆地区南美白对虾单产(Y)与放养密度(SD)呈极显著二次曲线关系Y=-0.0461SD2+11.204SD-78.959(R2=0.9707)(F>F0.01),当地南美白对虾最佳放养密度为122 ind./m2;新疆北疆地区南美白对虾单产Y与日投饲率(DFR)呈显著二次曲线关系Y=-24882DFR2+3628.2DFR+133.71(R2=0.8128)(F>F0.05),当地南美白对虾最佳日投饲率为7.29%。

The effects of stocking density and daily feeding rate on yield for P.vannamei were studied by using the gradient design method and regression analysis method to improve the yield of cultured P.vannamei.The results showed that the relationship between yield(Y) and stocking density(SD) of cultured P.vannamei in northern Xinjiang was very significant quadratic curve,Y=-0.0461 x2+11.204 x-78.959(R2=0.9707)(F>F0.01).The best stocking density of P.vannamei was 122 ind./m2.The relationship between the yield(Y) and the daily feeding rate(DFR) showed a significant quadratic curve,Y=-24882 DFR2+3628.2 DFR+133.71(R2=0.8128)(F>F0.05).The best daily feeding rate of P.vannamei in northern Xinjiang was 7.29%.