新美系大约克夏原种猪生长期饲粮适宜能量、粗蛋白和钙磷水平的研究

选择胎次、断奶日龄及年龄基本相近,体重为(20±1)kg的健康新美系大约克夏原种猪72头,采用四因素三水平的L9(34)正交试验,研究不同能量、粗蛋白、钙和磷水平对生长期新美系大约克夏原种猪生产性能、营养物质表观消化率和血清生化指标的影响。结果表明:①能量对日增重的影响达到显著水平(P<0.05);②能量、粗蛋白、钙和磷对能量表观消化率的影响达到极显著水平(P<0.01),粗蛋白、钙和磷对粗蛋白、粗纤维表观消化率的影响均达到极显著水平(P<0.01),能量对磷表观消化率的影响达到极显著水平(P<0.01),能量、粗蛋白、钙对粗脂肪表观消化率的影响达到极显著水平(P<0.01);③能量对血清总胆固醇(T-Cho)和血清甘油三酯的影响达到显著水平(P<0.05),蛋白质对血清蛋白(Alb)的影响达到极显著水平(P<0.01)。新美系大约克夏原种猪的适宜营养水平为:能量14.23kJ/kg,蛋白质21.5%,钙0.8%,磷0.8%。

Study on the Suitable Nutritional Level of Growth Newly Imported Yorkshire from USA

The experiments were conducted to study the effects of dietary energy(DE),crude protein(CP),calcium(Ca) and phosphorus(P) on the growth performance and blood biochemical parameters of growth Yorkshire newly imported from USA.The orthogonal 4×3 factorial trial was used and 9 kinds of diets were designed to determine the requirements of DE,CP,Ca and P of newly imported Yorkshire from USA.The results showed that the energy level significantly effected on the average daily gain(P<0.05),and the DE,CP,Ca and P levels extremely and significantly effected on DE digestion(P<0.01).The CP,Ca and P levels extremely and significantly effected on CP and CF digestion too(P<0.01).Similarly,the energy level extremely and significantly effected on P(digestion,and the DE,CP and Ca levels extremely and significantly effected on EE digestion.The energy level significantly effected on T-Cho and TG,and the CP level significantly effected on Alb.Our results indicate that the best nutritional level of Yorkshire diet should contain 14.23 kJ/kg DE,21.5% CP,0.8% Ca and 0.8% P,respectively.