研究论文 RESEARCH PAPER

泌乳期云南半细毛羊能量需要量研究

  • 梁家充 ,
  • 李银江 ,
  • 王思宇 ,
  • 薛白 ,
  • 洪琼花
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  • 1. 云南省畜牧兽医科学院草食家畜研究所, 昆明 650224;
    2. 四川农业大学动物营养研究所, 成都 611130
梁家充(1985-),男,广西宾阳人,助理研究员,硕士,从事动物遗传育种与繁殖和动物营养研究。E-mail:ljj200311@163.com

收稿日期: 2021-08-04

  网络出版日期: 2022-03-14

基金资助

国家绒毛用羊产业技术体系(CARS 39-08);云南省科技创新人才计划(2018HC017);云南省"万人计划"产业技术领军人才项目

Study on Energy Requirement of Yunnan Semi-Fine Wool Sheep during Lactation

  • LIANG Jiachong ,
  • LI Yinjiang ,
  • WANG Siyu ,
  • XUE Bai ,
  • HONG Qionghua
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  • 1. Yunnan Animal Science and Veterinary Institute, Kunming 650224, China;
    2. Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China

Received date: 2021-08-04

  Online published: 2022-03-14

摘要

本试验旨在研究泌乳期云南半细毛羊能量需要量,为建立云南半细毛羊饲养标准和繁育理论提供参考。将25只体况相近、经产2胎的泌乳期云南半细毛羊随机分成5组,每组5只羊。各组试验饲粮代谢能(ME)水平分别为8.05(Ⅰ组)、8.51(Ⅱ组)、9.03(Ⅲ组)、9.52(Ⅳ组)和10.00 MJ/kg(Ⅴ组),其他营养水平保持一致。饲养试验为期104 d,其中预试期14 d,正试期90 d。产羔当日为正试期起点,第1~30天为泌乳前期,第31~60天为泌乳中期,第61~90天为泌乳后期。结果表明:1)在泌乳期云南半细毛羊的总能消化率、总能代谢率和消化能代谢率中,均以泌乳前期为最高,其次为泌乳后期。2)泌乳期云南半细毛羊的ME与代谢体重(W0.75)、平均日增重(ADG)和泌乳量(MY)间的回归方程为:泌乳前期,ME=0.872W0.75+0.009ADG+2.950MY(R2=0.987);泌乳中期,ME=0.733W0.75-0.000 9ADG+2.642MY(R2=0.996);泌乳后期,ME=0.856W0.75-0.011ADG+3.768MY(R2=0.992)。通过回归方程得出,泌乳前期、中期和后期云南半细毛羊的维持ME需要量分别为0.872、0.733和0.856 MJ/kg W0.75;每产1 kg常乳的ME需要量分别为3.822、3.375和4.624 MJ。40、50和60 kg的云南半细毛羊,日泌乳量1 kg、无体重变化情况下,泌乳前期代谢能需要量分别为16.82、19.35和21.75 MJ/d;泌乳中期代谢能需要量分别为14.30、16.42和18.44 MJ/d;泌乳后期代谢能需要量分别为17.38、19.86和22.22 MJ/d。

本文引用格式

梁家充 , 李银江 , 王思宇 , 薛白 , 洪琼花 . 泌乳期云南半细毛羊能量需要量研究[J]. 动物营养学报, 2022 , 34(3) : 1694 -1708 . DOI: 10.3969/j.issn.1006-267x.2022.03.031

Abstract

This experiment was conducted to investigate the energy requirement of Yunnan semi-fine wool sheep during lactation, and to provide reference for establishing feeding standard and breeding theory of Yunnan semi-fine wool sheep. Twenty-five Yunnan semi-fine wool sheep with similar body condition and two pregnancies were randomly divided into 5 groups with 5 sheep each group. The metabolizable energy (ME) levels of experimental diets in the 5 groups were 8.05 (group Ⅰ), 8.51 (group Ⅱ), 9.03 (group Ⅲ), 9.52 (group Ⅳ) and 10.00 MJ/kg (group Ⅴ), respectively, and the other nutrient levels in the diet were consistent. The feeding experiment period was 90 days, which concluded 14 days of pre-trial period and 90 days of formal trial period. The lambing day was the starting point of formal trial period, the 1st to 30th day was the pre-lactation, the 31st to 60th day was the mid-lactation, and the 61st to 90th was the late-lactation. The results showed as follows:1) in the gross energy digestibility, gross energy metabolism rate and digestible energy metabolism rate of Yunnan semi-fine wool sheep during lactation, the pre-lactation was the highest, followed by the late-lactation. 2) In lactation, the relationship between ME and metabolic weight (W0.75), average daily gain (ADG) and milk yield (MY) of Yunnan semi-fine wool sheep were:pre-lactation, ME=0.872W0.75+0.009ADG+2.950MY (R2=0.987); mid-lactation, ME=0.733W0.75-0.000 9ADG+2.642MY (R2=0.996); late-lactation, ME=0.856W0.75-0.011ADG+3.768MY (R2=0.992). According to the regression equations, the maintenance ME requirements of Yunnan semi-fine wool sheep in the pre-lactation, mid-lactation and late-lactation were 0.872, 0.733 and 0.856 MJ/kg W0.75, respectively; the ME requirements per 1 kg of MY were 3.822, 3.375 and 4.624 MJ, respectively. The ME requirements of 40, 50 and 60 kg Yunnan semi-fine wool sheep with per 1 kg of MY and no weight change were 16.82, 19.35 and 21.75 MJ/d in the pre-lactation, respectively; 14.30,16.42 and 18.44 MJ/d in the mid-lactation, respectively; 17.38, 19.86 and 22.22 MJ/d in the late-lactation, respectively.

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