不同蛋白质水平饲粮对藏羔羊生长发育的影响

崔晓鹏, 侯生珍, 王志有, 马辽伟

doi:10.3969/j.issn.1006-267x.2017.03.041

动物营养学报 >

2017 , Vol. 29 >Issue 3: 1065 - 1073

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.03.041

研究简报 Short communications

不同蛋白质水平饲粮对藏羔羊生长发育的影响

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青海大学农牧学院, 西宁 810016

崔晓鹏(1990-),女,河南三门峡人,硕士研究生,从事动物营养与饲料科学研究。E-mail:cuixpssyjs@163.com

收稿日期: 2016-09-21

网络出版日期: 2017-03-09

基金资助

藏羊系列全价营养补饲料开发及示范推广项目（2015-NK-303）；智慧生态畜牧业贵南典型区技术集成与应用示范（2015-SF-A4-2）；2014年青海省科技厅重大专项藏羊高效养殖技术集成与示范推广（2014-NK-A6-2）

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Effects of Diets with Different Protein Levels on Growth and Development of Tibetan Lambs

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College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China

Received date: 2016-09-21

Online published: 2017-03-09

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摘要

本试验旨在研究不同蛋白质水平饲粮对藏羔羊生长发育的影响。试验采用单因子随机试验设计，选取2月龄断奶、体重（20.80±2.75）kg的藏公羔羊90只，随机分成3个组（每组30个重复，每个重复1只羊），分别饲喂蛋白质水平为10.8%、12.0%和13.2%的试验饲粮。试验期为127 d，其中预试期7 d，正试期120 d。结果显示：1）12.0%蛋白质水平组藏羔羊的试验第60~90天及第90~120天日增重和平均日增重最高，料重比最低。2）12.0%蛋白质水平组藏羔羊的腹泻率及尿道感染率较低，死亡率最低。3）在试验第60天，12.0%蛋白质水平组血清总蛋白（TP）含量与10.8%和13.2%蛋白质水平组均没有显著差异（P>0.05），但10.8%和13.2%蛋白质水平组之间差异显著（P<0.05）；在试验第90、120天，血清TP含量在12.0%和13.2%蛋白质水平组之间差异不显著（P>0.05），但二者均显著高于10.8%蛋白质水平组（P<0.05）。在各阶段，随着饲粮蛋白质水平的升高，血清葡萄糖（GLU）和总胆固醇（TC）含量均没有显著发生变化（P>0.05）。4）12.0%蛋白质水平组的单位成本增重最高，达到73.05元/kg，总收入和净收入最高，净收入达到7 800.51元。本试验条件下，饲粮蛋白质水平影响早期断奶藏羔羊的生长发育，12.0%蛋白质水平可提高藏羔羊的日增重，降低料重比和死亡率，改善血清生化指标，提高生长性能，并降低饲养成本。

关键词： 蛋白质水平; 藏羔羊; 日增重; 料重比; 血清生化指标

本文引用格式

崔晓鹏, 侯生珍, 王志有, 马辽伟 . 不同蛋白质水平饲粮对藏羔羊生长发育的影响[J]. 动物营养学报, 2017 , 29(3) : 1065 -1073 . DOI: 10.3969/j.issn.1006-267x.2017.03.041

Abstract

This experiment was conducted to evaluate the effects of diets with different protein levels on growth and development of Tibetan lambs. Using a single factor randomized trial design, ninety two-month-weaning Tibetan male lambs with (20.80±2.75) kg of body weight were randomly allocated to 3 groups with 30 replicates per group and 1 lamb per replicate. The lambs in those three groups were fed three experimental diets with different protein levels (10.8%, 12.0% and 13.2%, respectively). The experiment lasted for 127 days, and there was a pretrial period of 7 days followed by an experimental period of 120 days. The results showed as follows:1) the 60th to 90th day and the 90th to 120th day daily gain and average daily gain of 12.0% protein level group were the highest, while feed to gain ratio was the lowest. 2) The diarrhea rate and urethral infection rate of lambs of 12.0% protein level group were lower, and the mortality was the lowest. 3) At the 60th day of experiment, no significant difference in serum total protein content was found between 12.0% protein level group and 10.8% or 13.2% protein level groups (P>0.05), but a significant difference was found between 10.8% and 13.2% protein level groups (P<0.05). At the 90th and 20th day of experiment, serum total protein content of 12.0% and 13.2% protein level groups was significantly higher than that of 10.8% protein level group (P<0.05), but no significant difference was found between 12.0% and 13.2% protein level groups (P>0.05). At each stage, serum glucose and total cholesterol contents had no significant changes with dietary protein level increasing (P>0.05). 4) The gain weight per unit cost of 12.0% protein level group was the highest, and it reached up to 73.05 RMB/kg. The total income and net income of 12.0% protein level group were the highest with the net income reached up to 7 800.51 RMB. Under this experimental condition, it is concluded that dietary protein level can affect the growth and development of early-weaning Tibetan lambs. And 12.0% protein level can improve the Tibetan lambs' daily gain, reduce the feed to gain ratio and mortality, improve the serum biochemical parameters, improve the growth performance, and lower the feed cost.

Key words： protein level; Tibetan lambs; daily gain; feed to gain ratio; serum biochemical parameters

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