不同净能水平的低蛋白日粮对猪生长性能和养分消化率的影响  

Effects of Different Net Energy Levels on the Growth Performance, Nutrient Digestibility, and Concentrations of Serum Amino Acids and Urea Nitrogen in Growing Pigs Fed Low Crude Protein Diets

作　　者：尹慧红[1] 张石蕊[1] 孙建广[1] 易学武[2] 谯仕彦[2] 

机构地区：[1]湖南农业大学动物营养研究所,湖南长沙410128 [2]中国农业大学动物科技学院、动物营养学国家重点实验室,北京100193

出　　处：《中国畜牧杂志》2008年第13期25-28,共4页Chinese Journal of Animal Science

基　　金：国家“十一五”科技支撑计划项目(2006BAD12B02)

摘　　要：选取120头22kg左右的杜×长×大三元杂交健康生长猪,随机分成5个处理,每个处理6个重复,每个重复4头,探讨低蛋白不同净能水平(10.54、10.28、9.96、9.63、9.45MJ/kg)日粮对生长猪生长性能和养分消化率的影响。结果表明:日粮蛋白降低4个百分点,不同净能处理间的采食量和饲料转化率没有显著差异(P>0.05),日增重随净能的下降呈线性增加,以9.45MJ/kg组最高(P<0.05);养分消化率中,除钙的消化率外,其余养分的消化率均随净能水平的增加而线性下降(P<0.05)。降低净能水平后,血清赖氨酸含量线性增加(P=0.03),对其余氨基酸影响差异不显著(P>0.05);对血清尿素氮含量的影响不显著(P>0.05)。由此可得出,低蛋白日粮中净能水平的降低并不影响生长猪的生长性能和养分消化率。The experiment was conducted to investigate the effects of different net energy levels in low crude protein, amino acid-supplemented diets on the growth performance, and nutrient digestibility of the grower pigs. A total of 120 pigs （22.95 ±1.75） kg were randomly allotted to 5 treatments （five levels of net energy, 10.54, 10.28, 9.96, 9.63, and 9.45 MJ/kg） by weight with six replicates per treatment and four pigs per replicate. The results indicated that no significant difference was found in average daily feed intake and feed conversion ratio among five treatments, reducing net energy level and linearly increased average daily gain （P 〈 0.05）, and the average daily gain was maximized at pigs fed 9.45 MJ/kg net energy level diets. The digestibility of nutrients in pigs fed experiment diets were linearly increased with reducing net energy levels （P 〈 0.05） except digestibility of calcium. The concentrations of serum amino acids and urea nitrogen were no significantly difference （P 〉 0.05） besides lysine, While was increased significantly as dietary net energy levels decreased correspondingly （P 〈 0.05）. We can conclude that decreasing the net energy levels of grower pigs fed low crude protein, amino acid-supplemented diets has no effects on growth performance and nutrient digestibility.

关 键 词：低蛋白日粮 净能 消化率 生长性能 生长猪 

分 类 号：S828.5[农业科学—畜牧学]