论文部分内容阅读
鱼苗经过15～20天的饲养,体长达3～4厘米时,即成夏花鱼种,这时即应分塘饲养。但分塘后,一般不直接养成食用鱼,而在当年培育成春片鱼种。此外还要根据饲养时间长短、密度及饵料,池塘管理的优劣,以及生产实际需要等情况决定。一般早期和四月底左右生产的鱼类,体质好,生产快,可在五月二十～二十五日分塘;五月初或五月中旬生产的鱼苗,则在六月十日～十五日才能分塘。密度大,饵料少,饲养粗糙,混养的鱼苗一般更应提早分池。夏花分塘时需要全面规划,合理布局,以适应整个养殖生
Fry after 15 to 20 days of feeding, body length of 3 to 4 cm, that is, summer flowers species, then should be sub-pond feeding. However, after the sub-ponds, the general does not directly develop food fish, but in the same year to cultivate spring fish species. In addition, but also according to the length of feeding, density and feeding, pond management, the merits and demerits, as well as the actual production needs of the decision. Fish generally produced early and around the end of April are good in quality and fast in production. They can be subdivided into ponds from May 20 to May 25; fry produced in early May or mid-May will be between June 10 and 15 Day to sub-pond. Density, less food, feeding rough, polygamous fry in general should be more early sub-pool. Summer pond when the need for comprehensive planning, reasonable layout, to adapt to the entire breeding students