日粮蛋白质水平对早期断奶仔猪生产性能、粪便微生物及血液生化指标的影响  

Effect of Dietary Protein Level on Performance,Feces Micro-flora and Blood Biochemical Parameters in Early-weaned Piglets

作　　者：张维[1] 龚月生[1] 曹雨莉[1] 叶玲[2] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100 [2]陕西省饲料工业办公室,西安700200

出　　处：《西北农业学报》2007年第6期57-62,共6页Acta Agriculturae Boreali-occidentalis Sinica

摘　　要：采用单因素试验设计,选用(28±3)日龄、起始体重约(8.2±0.9)kg的二元杂种猪(L×Y)90头,随机分为5个处理,3重复/处理,6头/重复,分别饲喂粗蛋白质水平为16.5%、17.6%、18.7%、19.8%、20.9%的等能(3 300 MJ/kg)等氨基酸模式(Dlys∶D-SAA∶DThr∶DTrp=100∶57∶64∶18)的日粮,进行为期28d的饲养试验,研究5种不同粗蛋白质水平日粮对早期断奶仔猪生产性能、粪便微生物及部分血液生化指标的影响。结果表明,CP水平从16.5%增加至18.7%,仔猪平均日增重、平均日采食量线性增加,而料肉比线性降低;CP从18.7%进一步增加至20.9%,仔猪平均日增重、平均日采食量线性降低,料肉比线性增加,生产性能的各项指标呈二次曲线变化,蛋白质水平为18.7%时各项生产性能指标达到最优,因此以生产性能作为评价指标早期断奶仔猪最适宜的CP水平为18.7%。仔猪腹泻率,粪便大肠杆菌的数量以CP水平20.9%最高;血清总蛋白、白蛋白含量以及白蛋白/球蛋白先增加后降低,CP19.8%组含量最高,但未与CP18.7%达显著差异;血清尿素氮先增加后降低,CP19.8%组最高,但各组差异不显著(P>0.05)。The effect of dietary protein levels on piglets performance ,feces microflora and blood biochemical parameters were studied which lasted for 28days. Ninty （8. 204-0.9） kg , （284-3）d LY crossbreed weaning piglets were randomly allocated into five treatments（3 replicates per treatment . 6 piglets per replicate）. The crude protein of this diet were 16.5% ,17.6%,18.7% ,19.8% 20.9%. The amino acid pattern and digestible energy in five diets kept the same, Dlys D-SAA DThr DTrp= 100： 57 ： 64 ：18. The results showed that when the crude protein level was 18.7%,the performance of piglets were best. Diarrhea frequency ,the quantity of escherichia coli in 20.9% diet were significantly higher than those in other groups（P〈0.01）. Serum Tp, ALB,ALB/GLO increased with the protein level increased and decreased in CP19.8% group, but there was no significant difference between CP19.8%group and CP 18.7% group（P〉0.05） SUN concentration were not influenced by dietary protein levels（P〉0.05）.

关 键 词：蛋白质水平 早期断奶仔猪 生产性能 粪便微生物 血液指标 

分 类 号：S828[农业科学—畜牧学]