花对饲料中不同无机磷源的利用率

Availability of phosphorus in various inorganic phosphorus sources in dietary of Hemibarbus maculatus Bleeker

在以进口鱼粉和豆粕为蛋白源的基础饲料中分别添加磷酸二氢钙(MCP)、磷酸氢钙(DCP)、磷酸钙(TCP)制成总磷含量为0.91%的饲用饲料,饲养11 g左右的花8周,研究饲料中不同磷源对花幼鱼的生长,全鱼、脊椎骨和鳞片的灰分、钙、磷含量,以及总磷表观消化率的影响。结果表明,不同无机磷源对花的增重率、饲料效率有显著影响(P<0.05),MCP组、DCP组的相对增重率分别比TCP组提高24.86%、13.75%,MCP组的饲料效率比TCP组提高15.47%;MCP、DCP、TCP组全鱼、脊椎骨及鳞片的灰分、磷含量差异显著(P<0.05),MCP组全鱼、脊椎骨及鳞片的灰分、磷含量最高,显著高于TCP组,各组全鱼、鳞片的钙含量无显著差异;花对不同磷源的总磷表观消化率存在显著差异(P<0.05),MCP的表观消化率最高,MCP组、DCP组总磷表观消化率比TCP组分别提高85.97%和42.90%。综合来看,在3种无机磷源中,MCP作为花饲料中无机磷源的利用效果最佳,其次是DCP,而TCP则效果相对较差。

By use of fish meal and soybean meal as protein source, added with monobasic calcium phosphates （ MCP）, dibasic calcium phosphates（ DCP）, tribasic calcium phosphates（TCP） as different inorganic source of phosphorus respectively to formulate experimental diets （ Total P of 0.91% ） , each treatment with triplicate groups of Hemibarbus maculatus Bleeker（ initial weight about 11 g） was fed to satiation for 8 weeks. A study was conducted to investigate the effects of different phosphorus resources on growth, ash, calcium and phosphorus content of whole body , vertebrae and scale of Hemibarbus maculates Bleeker. The results showed that the growth and feed efficiency of spotted steed were significantly affected by different inorganic sources of phosphorus（P 〈0.05） . Weight gain rate of MCP, DCP group were improved 24.86%, 13.75% higer than that of TCP group respectively. Feed efficiency of MCP group was improved 15.47% higher than that of TCP group. Effects of different phosphorus sources on ash and phosphorus content in whole body, vertebrae, scale of Hemibarbus maculates Bleeker were significantly different except for calcium content. Ash and phosphorus content in whole body, vertebrae, scale of MCP group were the highest, higher than those of TCP group significantly. Apparent phosphorus digestibility of spotted steed was significantly affected by different inorganic source of phosphorus （ P 〈 0.05 ） , which in MCP group was the highest. Apparent phosphorus digestibility of MCP group and DCP group were improved 85.97% , 42.90% more than that of TCP group respectively. From all above three criteria, it was suggested that MCP was the best dietary inorganic phosphorus source for Hemibarbus maculatus Bleeker, and DCP was also ideal dietary inorganic phosphorus source, but TCP was relatively inferior.