动物营养学报 >

2019 , Vol. 31 >Issue 2: 692 - 698

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.02.025

反刍与草食动物营养 Ruminant and herbivore nutrition

饲粮能量水平对育肥前期锦江阉牛生长性能、养分消化和能量代谢的影响

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  • 1. 江西农业大学, 江西省动物营养重点实验室, 江西省营养饲料开发工程中心, 南昌 330045;
    2. 国家肉牛产业技术体系高安试验站, 高安 330800
柏峻(1993-),男,江西瑞昌人,硕士研究生,研究方向为动物营养与饲料科学。E-mail:baijun0320@163.com

收稿日期: 2018-07-31

  网络出版日期: 2019-02-18

基金资助

国家重点研究计划（2018YFD0501804）；国家现代肉牛牦牛产业技术体系项目（CARS-37）

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Effects of Dietary Energy Level on Growth Performance, Nutrient Digestion and Energy Metabolism of Jinjiang Steers in Early Stage of Fattening

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  • 1. Engineering Research Center of Feed Development, Jiangxi Province Key Laboratory of Animal Nutrition, Jiangxi Agricultural University, Nanchang 330045, China;
    2. National Beef Cattle Industrial Technology System of Gao'an Test Station, Gao'an 330800, China

Received date: 2018-07-31

  Online published: 2019-02-18

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摘要

本试验旨在研究饲粮能量水平对育肥前期（14~16月龄）锦江阉牛生长性能、能量代谢规律的影响，并建立消化能需要量模型。试验选用50头体况良好、体重[（301.74±30.98）kg]相近的锦江阉公牛，随机分为5组，每组4个重复（栏），每个重复2~3头牛。A组为对照组，B、C、D、E组饲粮的综合净能水平在A组饲粮基础上分别提高6%、12%、18%、24%，5种饲粮的综合净能水平分别为6.02、6.38、6.74、7.10、7.46 MJ/kg。试验预试期10 d，正试期116 d。饲养试验结束后立即进行消化代谢试验，测定锦江阉牛生长性能及养分消化率，并建立育肥前期锦江阉牛消化能需要量模型。结果表明：1）各组间锦江阉牛的平均日增重（ADG）差异不显著（P>0.05），但随着饲粮能量水平的提高而呈逐渐增加的趋势。各组的平均干物质采食量随着饲粮能量水平提高呈逐渐降低趋势，但组间差异不显著（P>0.05）。C、D、E组的料重比均显著低于A组（P<0.05）。2）各组间锦江阉牛采食总能、消化能、总能消化率及养分表观消化率均差异不显著（P>0.05）。3）育肥前期锦江阉牛ADG与消化能存在高度线性正相关（R2=0.996）。综上所述，在本试验条件下，提高饲粮能量水平能够提高育肥前期锦江阉牛的生长性能；消化能需要量模型为：消化能=0.638W0.75+36.837×ADG。

关键词： 锦江阉牛; 生长性能; 能量代谢; 能量需要量

本文引用格式

柏峻, 赵二龙, 李美发, 辛均平, 许兰娇, 瞿明仁, 易中华, 杨食堂, 杨建军, 李艳娇 . 饲粮能量水平对育肥前期锦江阉牛生长性能、养分消化和能量代谢的影响[J]. 动物营养学报, 2019 , 31(2) : 692 -698 . DOI: 10.3969/j.issn.1006-267x.2019.02.025

Abstract

This experiment was conducted to investigate the effects of dietary energy level on growth performance, energy metabolism, and to establish the model for digestive energy (DE) requirements of Jinjiang steers in the early stage of fattening (14 to 60 months of age). Fifty steers with good body condition and similar weight of (301.74 ±30.98) kg were randomly divided into 5 groups with 4 replicates per group and 2 to 3 steers per replicate. Group A was the energy control group, and the combined net energy (NEmf) levels of steers in groups B, C, D and E were increased by 6%, 12%, 18% and 24%, respectively on the basis of group A. The NEmf of the 5 diets was 6.02, 6.38, 6.74, 7.10 and 7.46 MJ/kg, respectively. Pre-test period was 10 days and test period was 116 days. The digestive metabolic test was conducted immediately after the feeding test. The growth performance and energy digestibility of Jinjiang steers were measuredl, and the model for DE requirements was established. The results showed as follows:1) the average daily gain (ADG) of Jinjiang steers was not significantly different among groups (P>0.05), but showed a gradual increase with the improvement of energy levels. The average dry matter intake (ADMI) in groups was decreased gradually with the increased energy levels, but the difference was not significant (P>0.05). The dietary energy levels had a significant influence on the feed to gain ratio (F/G), the F/G of groups C, D and E was significantly lower than that of group A (P<0.05). 2) The total energy intake, DE, total energy digestibility and nutrient apparent digestibility of Jinjiang steers were not significantly different among groups (P>0.05). 3) There was a high degree of positive linear correlation between ADG and DE (R2=0.996). In conclusion, under the experimental conditions, the improvement of dietary energy levels can improve the growth performance of Jinjiang steers; the DE requirement of Jinjiang steers can be estimated by the following equation:DE=0.638W0.75+36.837×ADG.

Key words： Jinjiang steers; growth performance; energy metabolism; energy requirement

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