论文部分内容阅读
春季合理放养鱼种是取得良好经济效益的保证。只有根据池塘的大小、深浅,水质肥瘦,水源排灌充分与否来决定放养鱼种的规格和密度,才能提高养殖产量和效益。以下是根据鱼类的生物学特征所确定的鱼种合理投放规格,供养殖户参考。一、合理放养鱼种规格鲢、鳙鱼是轮捕轮放的主要品
Reasonable stocking in spring is to ensure good economic returns. Only in accordance with the size of the pond, shades, water quality and fat, water irrigation sufficient or not to determine the size and density of stocking species in order to improve farming yield and benefits. The following is based on the biological characteristics of fish species to determine the reasonable delivery specifications, for farmers reference. First, rational stocking species silver carp, bighead carp is the main product of the round catch round