动物营养学报 >

2018 , Vol. 30 >Issue 9: 3535 - 3542

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.09.023

反刍动物营养 Ruminant nutrition

饲粮中棉秆比例对绵羊生长性能和消化性能的影响

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  • 新疆畜牧科学院饲料研究所, 乌鲁木齐 830000
张俊瑜(1983-),男,河北沧州人,助理研究员,硕士,从事反刍动物营养与饲料科学的研究。E-mail:363180001@qq.com

收稿日期: 2018-02-23

  网络出版日期: 2018-09-20

基金资助

新疆维吾尔自治区公益性科研院所基本科研业务经费（KY2017003）；新疆维吾尔自治区科研机构创新发展专项资金项目（2016D04018）；国家现代农业肉羊产业技术体系专项资金（CARS-38）

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Effects of Cotton Stalk Ratio in Diets on Growth and Digestive Performance of Sheep

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  • Institute of Feed Research, Xinjiang Academy of Animal Science, Urumqi 830000, China

Received date: 2018-02-23

  Online published: 2018-09-20

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摘要

本试验旨在研究饲粮中不同比例棉秆对绵羊生长性能和营养物质表观消化率的影响及棉秆中营养物质在绵羊体内的消化代谢参数。试验采用单因素完全随机试验设计，将体重相近的50只试验羊随机分为5组，每组10只，对照组（CK组）饲喂全价颗粒基础饲粮，试验组饲粮分别以棉秆替代10%（A组）、20%（B组）、30%（C组）和40%（D组）的基础饲粮。试验全期68 d，其中预试期7 d，饲养试验53 d，消化代谢试验8 d。结果表明：1）平均日增重（ADG）随棉秆替代比例的增加而下降，表现为C组和D组极显著低于CK组（P < 0.01），显著低于A组（P < 0.05），CK组、A组和B组之间差异不显著（P>0.05）；干物质采食量无显著变化（P>0.05）。2）饲粮中营养物质的表观消化率随棉秆替代比例的增加而依次下降，其中D组比CK组的干物质（DM）、有机物（OM）、粗蛋白质（CP）、粗纤维（EE）、中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）的表观消化率分别低17.17%（P < 0.01）、18.22%（P < 0.01）、12.14%（P < 0.01）、36.36%（P < 0.01）、26.26%（P < 0.01）和36.24%（P < 0.05）。3）棉秆中营养物质的表观消化率随替代比例的增加表现不一。当棉秆替代比例为30%时，棉秆中营养物质的表观消化率均处于较高水平。C组和D组DM和OM表观消化率极显著高于A组和B组（P<0.01）；A组CP和NDF的表观消化率极显著低于B组、C组和D组（P<0.01）。本试验条件下，棉秆可以作为粗饲料用于育肥羊生产，替代比例以30%为宜。

关键词： 棉秆; 绵羊; 营养物质; 生长性能; 表观消化率

本文引用格式

张俊瑜, 桑断疾, 张志军, 苏玲玲, 郭同军, 王文奇 . 饲粮中棉秆比例对绵羊生长性能和消化性能的影响[J]. 动物营养学报, 2018 , 30(9) : 3535 -3542 . DOI: 10.3969/j.issn.1006-267x.2018.09.023

Abstract

This experiment was conducted to investigate the effects of different ratios of cotton stalk in diets on growth performance and nutrient apparent digestibility of sheep, and the nutrient metabolism parameters of cotton stalks in the whole digestive tract of sheep. Fifty sheep with the similar body weight were randomly assigned to 5 groups with 10 sheep in each group by a single factor completely randomized design. Sheep in the control group were fed a basal diet, and sheep in trial groups were fed the basal diet replaced by 10%, 20%, 30% and 40% cotton stalk, respectively. The experiment lasted for 68 d including a 7-d preliminary experiment, a 53-d formal experiment and an 8-d digestion and metabolism experiment. The results showed as follows:1) the average daily gain was decreased with the increasing replacement ratio of cotton stalk, groups C and D were significantly lower than group CK (P < 0.01) and group A (P < 0.05); no significant effect on dry matter intake was found (P>0.05). 2) As the replacement ratio of cotton stalk in diets increased, nutrient apparent digestibility of diets was decreased. The apparent digestibility of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), neutral detergent fiber (NDF) and acid detergent fiber (ADF) in group D was lower than that in group CK by 17.17% (P < 0.01), 18.22% (P < 0.01), 12.14% (P < 0.01), 36.36% (P < 0.01), 26.26% (P < 0.01) and 36.24% (P < 0.05). 3) With the increasing replacement ratio of cotton stalk, the apparent digestibility of nutrients in cotton stalk had different changes. When the replacement ratio of cotton stalks was 30%, the apparent digestibility of nutrients in cotton stalk was higher. The apparent digestibility of DM and OM in groups C and D were significantly higher than that in groups A and B (P<0.01); the apparent digestibility of CP and NDF was significantly lower than that in groups B, C and D (P<0.01). Under this experimental condition, cotton stalk can be used as an roughage in fatting sheep production, and the optimal replacement ratio of cotton stalks in the basal diet is 30%.

Key words： cotton stalk; sheep; nutrient; growth performance; apparent digestibility

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