研究了草鱼种对饵料中钙磷的需要量及适宜钙磷比。试验结果以增重率和饵料转换率两项生物学指标为依据进行综合分析。结果表明 ,在本试验条件下草鱼对饵料中钙的需要量为 0 .4 73%～ 0 .788% ,磷的需要量为 1.4 19%～ 1.5 77% ,钙磷的总需要量在 2 .10 0 %～ 2 .70 0 %范围内 ,适宜钙磷比则随着钙磷含量的高低同异而变化 ,即在钙磷含量较低而总量不同时为 1∶3,钙磷含量高而总量相同时为 1∶2。当钙磷比中的磷小于 2时 ,钙磷总量高则可减轻因钙磷不平衡对草鱼生长所产生的抑制作用。钙磷比不等于 1∶2 (或 1∶3)时 ,钙磷总量过多或过少都不利于鱼的生长 ,且饵料转换率呈降低趋势 The requirement of grass carp species for calcium and phosphorus in food and the suitable ratio of calcium and phosphorus were studied. The results of the experiment are based on two biological indexes: weight gain rate and feed conversion rate. The results showed that the dietary requirements of grass carp were 0.47 ~ 0.788%, 1.419% ~ 1.577% for phosphorus and 2% for calcium and phosphorus. 10 0% -2 70 0% range, the appropriate ratio of calcium and phosphorus with the same level of calcium and phosphorus content changes, that is, in the low calcium and phosphorus content is not the same time as 1: 3, high calcium and phosphorus content The same amount of time for the same 1: 2. When the ratio of calcium to phosphorus is less than 2, the total amount of calcium and phosphorus can reduce the inhibition of the growth of grass carp due to the imbalance of calcium and phosphorus. Calcium-phosphorus ratio is not equal to 1: 2 (or 1: 3), the total amount of calcium and phosphorus is too detrimental to the growth of fish, and the feed conversion rate decreased