动物营养学报 >

2016 , Vol. 28 >Issue 3: 816 - 825

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.03.022

饲料资源开发 Feed Resources Development

禾王草与奶牛常用粗饲料瘤胃降解特性的对比研究

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  • 1. 新疆农业大学动物科学学院, 乌鲁木齐 830052;
    2. 中国农业大学动物科技学院, 北京 100193
马健(1989-),男,山东济宁人,硕士研究生,研究方向为反刍动物营养。E-mail:Crazyma0411@163.com

收稿日期: 2015-10-15

  网络出版日期: 2016-03-14

基金资助

现代农业(奶牛)产业技术体系建设专项资金(CARS-37)

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Comparison of Rumen Degradation Characteristics between Pennisetum sp. and Commonly Used Roughages for Dairy Cows

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  • 1. College of Animal Science and Technology, Xinjiang Agricultural University, Urumqi 830052, China;
    2. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2015-10-15

  Online published: 2016-03-14

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摘要

本试验旨在研究2种刈割高度的禾王草干草和青贮、羊草干草、苜蓿干草以及全株玉米青贮共7种粗饲料的瘤胃降解特性。选用4头装有永久性瘤胃瘘管的荷斯坦奶牛为试验动物,采用尼龙袋法评定其干物质(DM)、粗蛋白质(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的72 h瘤胃降解率。结果表明:1)禾王草干草CP含量显著高于羊草干草(P<0.05),NDF含量显著低于羊草干草(P<0.05);禾王草青贮CP和NDF含量显著高于全株玉米青贮(P<0.05)。2)苜蓿干草DM有效降解率最高,与依次降低的全株玉米青贮、2.0 m禾王草青贮、2.5 m禾王草青贮、2.0 m禾王草干草、2.5 m禾王草干草和羊草干草差异显著(P<0.05),羊草干草的DM有效降解率显著低于其他粗饲料(P<0.05);CP有效降解率以苜蓿干草最高,与2.0 m禾王草青贮差异不显著(P>0.05),显著高于依次降低的2.5 m禾王草青贮、2.0 m禾王草干草、全株玉米青贮、2.5 m禾王草干草和羊草干草(P<0.05);全株玉米青贮与禾王草青贮的NDF有效降解率差异不显著(P>0.05),而显著高于其他粗饲料(P<0.05);禾王草青贮72 h时ADF有效降解率显著高于其他粗饲料(P<0.05)。由此可知,禾王草有作为奶牛粗饲料的潜力,禾王草经青贮后可以保存营养成分,并可以提高营养成分的瘤胃利用效率。

关键词： 禾王草; 营养成分; 尼龙袋技术; 瘤胃降解率

本文引用格式

马健, 刘艳芳, 杜云, 李胜利, 余雄 . 禾王草与奶牛常用粗饲料瘤胃降解特性的对比研究[J]. 动物营养学报, 2016 , 28(3) : 816 -825 . DOI: 10.3969/j.issn.1006-267x.2016.03.022

Abstract

This experiment was conducted to determine the rumen degradation characteristics of 7 kinds of roughages including 2 kinds of Pennisetum sp. hay (different cutting height), 2 kinds of Pennisetum sp. silage (different cutting height), dried Chinese wildye, dried alfalfa hay and whole corn silage. Four Holstein cows with permanent ruminal cannulas were used. Nylon-bag technique was used to evaluate the ruminal degradability of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF). The results showed as follows: 1) the content of CP in Pennisetum sp. hay was significantly high than that in dried Chinese wildye (P<0.05), but compared with the dried Chinese wildye, the content of NDF was significantly reduced (P<0.05); the contents of CP and NDF in Pennisetum sp. silage were significantly high than those in whole corn silage (P<0.05). 2) The DM effective degradability of dried alfalfa hay was significantly higher than that of whole corn silage, 2.0 m Pennisetum sp. sliage, 2.5 m Pennisetum sp. silage, 2.0 m Pennisetum sp. hay, 2.5 m Pennisetum sp. hay and dried Chinese wildye (P<0.05), which was decreased in the above order, and dried Chinese wildye was significantly lower than others (P<0.05); CP effective degradability of dried alfalfa hay was not significantly different from 2.0 m Pennisetum sp. silage (P>0.05), but was significantly higher than that of 2.5 m Pennisetum sp. silage, 2.0 m Pennisetum sp. hay, whole corn silage, 2.5 m Pennisetum sp. hay and dried Chinese wildye (P<0.05), which was decreased in the above order; NDF effective degradability of whole corn silage was not significantly different from Pennisetum sp. silage (P>0.05), and was significantly higher than that of other roughages (P<0.05); ADF effective degradability of Pennisetum sp. silage at 72 h was significantly higher than that of other roughers (P<0.05). It is concluded that Pennisetum sp. has a potential as a new non-conventional feed resource for ruminants, silage can save the nutrition composition, and can improve the rumen degradation of nutrition composition.

Key words： Pennisetum sp.; nutrition composition; nylon-bag technique; rumen degradation rate

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