两种磷源与水平对3月龄獭兔饲养性能与养分利用的影响

Influence of Level and Source with P on Growth Performance,Nutrient Utilization Efficiency of 3 Month Rex Rabbit

比较骨粉与磷酸氢钙对獭兔生产性能与养分消化率的影响差异,评价骨粉的生物学效价,为准确利用磷源提供理论依据。试验选用56天美系獭兔120只(其中饲养试验96只、消化试验24只),通过饲养试验与消化试验,研究了0.35%,0.45%,0.55%和0.65%水平磷骨粉与磷酸氢钙对3月龄獭兔饲养性能和养分的表观消化率,并用斜率比法评价了骨粉的生物学效价。结果表明:①不同磷水平的骨粉和磷酸氢钙对3月龄獭兔的日增重影响差异不显著(P>0.05),但粗蛋白和钙的表观消化率差异极显著,以磷酸氢钙组高(P<0.01);两种磷源均以0.35%添加水平较好。②相对磷酸氢钙(CHM),骨粉(BM)的生物学效价为97.66%。骨粉用于3月龄獭兔的磷源供应效果不及磷酸氢钙,3月龄獭兔的适宜磷添加水平以0.35%为宜。

In order to provide the oretical basis of precisely using phosphorus source,the performance and nutrient digestibility differences between bone meal and calcium hydrogen phosphate was compared and the biological value of bone meal was evaluated in Rex Rabbit.120 Rex Rabbit at 56 day age were randomly divided into groups for feeding and digestive experiments.The level of bone meal and calcium hydrogen phosphate were set 0.35%,0.45%,0.55% and 0.65%,respectively.The growth performance and nutrient utilization were measured at 3 months age of Rex Rabbit,and the biological value of bone meal was evaluated by slope analogy method.The results showed that：①Different levels of bone meal and calcium hydrogen phosphate are no significant difference in 63 to 90 day age of rabbit daily gain influence（P〉 0.05）.The crude protein and calcium apparent digestibility were significant difference.The 0.35% levels were better in two kinds of phosphorus source.② The biological value relative to BM and CHM was approximately 97.66%.In conclusion,calcium hydrogen phosphate is better a good phosphorus source than bone meal,and the 0.35% level of calcium hydrogen phosphate is advisable in feed of Rex Rabbit.