磷酸二氢钙在动物饲料中的应用技术

1肉仔鸡

磷酸二氢钙的生物学效价高于所有其他磷酸盐：试验结果表明磷酸二氢钙的生物学效价分别比磷酸氢钙高出19%、25%、25%。根据磷酸盐的当量值推定：1千克磷酸氢钙=0.6千克磷酸二氢钙；

实际应用时，可根据磷酸盐的校正磷价格决定选择使用哪种磷酸盐：肉仔鸡日粮使用磷酸二氢钙比磷酸氢钙的饲喂效果明显较高。

2产蛋鸡

衡量产蛋鸡生产性能指标不同，RBV不同；对于产蛋鸡的应用效果：磷酸一二钙＝磷酸氢钙＞磷酸二氢钙＞磷酸二氢钾；产蛋鸡磷源应选择磷酸一二钙或磷酸氢钙，不宜使用磷酸二氢钙；产蛋鸡料应选用粒状磷酸氢钙。

3猪

对于猪，磷酸二氢钙和磷酸氢钙的RBV相比，磷酸二氢钙高于磷酸氢钙18%；以0.65千克的磷酸二氢钙可代替1千克的磷酸氢钙；对于生长育肥猪料应根据磷酸盐的校正磷价格决定取舍哪种磷酸盐；对于断奶的乳猪：磷酸二氢钙代替磷酸氢钙，采食量提高16%，日增重提高11%，经济效益提高40%。

4鱼

鱼饵料选用磷酸二氢钙：鲤鱼饵料的非植酸磷水平应为0.60%，磷酸二氢钾的最适添加量应为20.2千克/吨。

5总结

不同动物，不同饲养阶段日粮，应选用不同化学形态的磷酸盐。

肉仔鸡和生长肥育猪：从生产性能和相对生物学效价判断，磷酸二氢钙优于任何一种其他磷酸盐。

产蛋鸡：粒状磷酸一二钙（MDCP）或粒状磷酸氢钙（DCP）

早期断奶仔猪：磷酸二氢钙（MCP）

鱼：磷酸二氢钙（MCP）

The method of MCP application in animal feed

1broiler

MCP seems to have the highest P digestibility compared with other feed Phosphorus. The results confirm that the P digestibility of MCP is 19%, 25%, 25% higher than DCP respectively. According to the P digestibility of MCP and DCP, we can draw a conclusion that 1 kilogram DCP = 0.6 kilogram MCP. We could determine which feed phosphorus to use according to price of corrected P. The broilers which feed MCP grow more fast than the broilers feed DCP.

2laying hens

The results confirmed that there is great variation in P relative biological value between feed phosphates, and the P relative biological value of laying hens is difference with the index of

performance. The effect of different feed phosphates applying in laying hens is that MDCP and DCP are the best of all the 4 tested sources, and the effect of MCP is better than MSP. So MDCP and DCP are the best source of P for laying hens, but MCP is not fit for laying hens. And the granular DCP is better than other feed phosphates.

3pigs

The relative biological value of MCP is 18% higher than DCP in piglets. And the effect of MCP and DCP is that MCP 0.65 kilogram can take place of 1 kilogram DCP in piglets’ feed. We could determine which feed phosphorus to use according to price of corrected P of all tested source. The prevenient