提高鲈鱼苗池塘培育成活率试验

捕捞天然鲈鱼进入养殖的哲养阶段死亡率较高，如何提高暂养成活率？在５．１亩池塘内进行了试验。主要措施：施鸡粪，磷肥，尿素肥水，调节水质和透明度，选用软质尼龙材料捕苗，装苗，带水妥苗，放养鲈鱼规格整齐，及时调整投饵量，结果：经６２天培育，成活率达７１．４％，亩纯利３３７２５元，试验认为，放养密度以２万尾／亩为宜。

Experiment on Raising Survival Rate of Perch Fry Rearing in the Pond

In order to lower the survival rate of the natural perch fry temporarily cultured before being released into the finished farming pond ,an experiment was conducted in a pond with the area of 5.1 mu .The main technical measures were such as fertilizing pond water with chicken's excrement ,phosphate and carbamide ,adjusting the water quality and water transparency ,using soft nylon material for catching and transporting fry ,stocking fry of uniform size and controlling the amount of diet .After 62days' rearing ,the survival rate was 71.4%and the net profit permu was 33 725 yuan .According to the experimental result ,the releasing density suitable for growth was 20 thousand fry per mu.