动物营养学报 >

2020 , Vol. 32 >Issue 1: 310 - 320

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.01.038

反刍与草食动物营养与饲料 RUMINANT AND HERBIVORE NUTRITION AND FEED

荞麦秸秆饲粮中添加过瘤胃赖氨酸和蛋氨酸对滩羊生长性能和消化代谢的影响

  • 高昌鹏 ,
  • 周玉香 ,
  • 杨万宗 ,
  • 吴爽 ,
  • 贾柔 ,
  • 李作明 ,
  • 田玉富
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  • 1. 宁夏大学农学院, 银川 750021;
    2. 宁夏农垦鲁宁小尾寒羊种羊场, 银川 750200
高昌鹏(1993-),男,甘肃通渭人,硕士研究生,研究方向为动物营养与饲料科学。E-mail:1758473387@qq.com

收稿日期: 2019-06-20

  网络出版日期: 2020-01-19

基金资助

公益性行业（农业）科研专项（201503134）

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Effects of Buckwheat Straw Diet Supplemented with Rumen Protected Lysine and Methionine on Growth Performance and Digestion and Metabolism of Tan Sheep

  • GAO Changpeng ,
  • ZHOU Yuxiang ,
  • YANG Wanzong ,
  • WU Shuang ,
  • JIA Rou ,
  • LI Zuoming ,
  • TIAN Yufu
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  • 1. College of Agriculture, Ningxia University, Yinchuan 750021, China;
    2. Ningxia Luning Small Tail Hai Sheep Farm, Yinchuan 750200, China

Received date: 2019-06-20

  Online published: 2020-01-19

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摘要

本试验旨在研究纤维素酶处理的荞麦秸秆饲粮中添加过瘤胃赖氨酸和蛋氨酸对滩羊生长性能和消化代谢的影响。选取体重相近、健康无病的5月龄宁夏滩羊羯羊20只，随机分为5组，每组4只。对照组饲喂基础饲粮+4.5 g/d过瘤胃蛋氨酸，试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组在饲喂基础饲粮+4.5 g/d过瘤胃蛋氨酸的基础下，分别添加2.5、5.0、7.5和10.0 g/d过瘤胃赖氨酸。预试期15 d，正试期60 d。饲养试验中期进行消化代谢试验，测定滩羊生长性能、营养物质表观消化率、能量代谢及氮代谢。结果表明：1）各组间的结束体重、总增重、平均日增重和干物质采食量无显著差异（P>0.05），试验Ⅰ、Ⅱ、Ⅲ组的料重比显著低于对照组（P<0.05）。2）试验Ⅰ组的结束体长显著高于对照组（P<0.05）。3）试验Ⅳ组的干物质表观消化率显著低于其他各组（P<0.05），试验Ⅱ组的中性洗涤纤维表观消化率显著高于其他各组（P<0.05）。4）试验Ⅲ组的尿能显著低于对照组（P<0.05），试验Ⅳ组的消化能显著低于其他各组（P<0.05），试验Ⅲ组的总能表观消化率显著高于试验Ⅳ组（P<0.05）。5）试验Ⅲ组的粪氮显著低于试验Ⅳ组（P<0.05），试验Ⅰ、Ⅲ组的消化氮和氮表观消化率显著高于试验Ⅳ组（P<0.05），试验Ⅲ、Ⅳ组的尿氮显著低于试验Ⅰ组（P<0.05），试验Ⅲ、Ⅳ组的氮的生物学价值显著高于试验Ⅰ组（P<0.05）。综上所述，在纤维素酶处理的荞麦秸秆饲粮中添加适量的过瘤胃赖氨酸和蛋氨酸可以降低料重比，减少粪氮、尿氮的排出量，增加氮的沉积。本试验条件下，过瘤胃赖氨酸的适宜添加量为7.5 g/d，且赖氨酸和蛋氨酸的适宜比例为1.85：1.00。

关键词： 荞麦秸秆; 过瘤胃赖氨酸; 过瘤胃蛋氨酸; 滩羊; 生长性能; 消化代谢

本文引用格式

高昌鹏 , 周玉香 , 杨万宗 , 吴爽 , 贾柔 , 李作明 , 田玉富 . 荞麦秸秆饲粮中添加过瘤胃赖氨酸和蛋氨酸对滩羊生长性能和消化代谢的影响[J]. 动物营养学报, 2020 , 32(1) : 310 -320 . DOI: 10.3969/j.issn.1006-267x.2020.01.038

Abstract

The purpose of this experiment was to study the effects of cellulase treatment buckwheat straw diet supplemented with rumen protected lysine and methionine on growth performance and digestion and metabolism of Tan sheep. Twenty healthy five-month-old Ningxia Tan sheep with similar body weight were randomly divided into 5 groups with 4 sheep in each group. The control group was fed a basal diet+4.5 g/d rumen protected methionine, the trial groups Ⅰ, Ⅱ, Ⅲ and Ⅳ were fed the basal diet+4.5 g/d rumen protected methionine added 2.5, 5.0, 7.5 and 10.0 g/d rumen protected lysine, respectively. The preparation period was 15 days, and the formal experiment period was 60 days. In the mid-term of the feeding experiment, the digestion metabolism experiment was carried out to determine the growth performance, nutrient apparent digestibility, energy metabolism and nitrogen metabolism of Tan sheep. The results showed as follows:1) there were no significant differences in the final weight, total gain, average daily gain and dry matter intake among all groups (P>0.05), and the ratio of feed to gain of trial groups Ⅰ, Ⅱ and Ⅲ was significantly lower than that of the control group (P<0.05). 2) The final body length of trial group Ⅰ was significantly higher than that of the control group (P<0.05). 3) The apparent digestibility of dry matter of trial group Ⅳ was significantly lower than that of other groups (P<0.05), and the apparent digestibility of neutral detergent fiber of trial group Ⅱ was significantly higher than that of other groups (P<0.05). 4) The urine energy of trial group Ⅲ was significantly lower than that of the control group (P<0.05), the digestive energy of trial group Ⅳ was significantly lower than that of other groups (P<0.05), and the apparent digestibility of gross energy of trial group Ⅲ was significantly higher than that of trial group Ⅳ (P<0.05). 5) The feces nitrogen of trial group Ⅲ was significantly lower than that of trial group Ⅳ (P<0.05), the digestive nitrogen and apparent digestibility of nitrogen of trial groups Ⅰ and Ⅲ was significantly higher than that of trial group Ⅳ (P<0.05), the urine nitrogen of trial groups Ⅲ and Ⅳ was significantly lower than that of trial group Ⅰ (P<0.05), and the biological value of nitrogen of trial groups Ⅲ and Ⅳ was significantly higher than that of trial group Ⅰ (P<0.05). In summary, the appropriate addition of rumen protected lysine and methionine in cellulose treatment buckwheat straw diet can reduce the ratio of feed to gain, decrease the output of the fecal nitrogen and urine nitrogen, and increase the nitrogen deposition. Under this experimental condition, the optimal amount of rumen protected lysine is 7.5 g/d, and the optimal ratio of lysine to methionine is 1.85:1.00.

Key words： buckwheat straw; rumen protected lysine; rumen protected methionine; Tan sheep; growth performance; digestion and metabolism

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