不同收获期揉丝水稻秸秆在奶牛瘤胃内的降解特性

马钱波, 王琳, 李志威, 黄倩倩, 赵国琦

doi:10.3969/j.issn.1006-267x.2018.11.047

动物营养学报 >

2018 , Vol. 30 >Issue 11: 4695 - 4703

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.11.047

饲料资源开发 Feed Resources Development

不同收获期揉丝水稻秸秆在奶牛瘤胃内的降解特性

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扬州大学动物科学与技术学院, 扬州 225000

马钱波(1994-),男,江苏镇江人,硕士研究生,从事饲草加工与利用以及草食动物营养研究。E-mail:1601555436@qq.com

收稿日期: 2018-04-19

网络出版日期: 2018-11-20

基金资助

奶牛饲草饲料型TMR配制及高效利用技术研究与集成示范（2017YFD0502104-3）

收起

Ruminal Degradation Characteristics of Kneaded Rice Straw at Different Harvest Periods in Dairy Cows

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College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China

Received date: 2018-04-19

Online published: 2018-11-20

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摘要

本试验旨在研究揉丝处理对不同收获期水稻秸秆营养成分及奶牛瘤胃降解特性的影响。试验样品分别在9月末与11月初采集，经相同试验前处理，共4组样品，分别为9月末水稻秸秆、9月末揉丝水稻秸秆、11月初水稻秸秆和11月初揉丝水稻秸秆。测定样品中营养成分的含量，并用尼龙袋法测定上述样品在奶牛瘤胃中干物质（DM）、粗蛋白质（CP）、中性洗涤纤维（NDF）以及酸性洗涤纤维（ADF）的降解率，得到各营养成分的动态降解参数。结果表明：9月末水稻秸秆CP含量高于11月初水稻秸秆，粗灰分含量低于11月初水稻秸秆。9月末水稻秸秆CP、NDF和ADF的瘤胃降解率显著高于11月初水稻秸秆（P<0.05）。揉丝处理对9月末水稻秸秆的DM、CP、ADF的有效降解率（ED）影响不显著（P>0.05），但对11月初水稻秸秆的DM、CP、ADF的ED有显著提高的作用（P<0.05）。综合得出，9月末水稻秸秆相比11月初水稻秸秆更适合作为粗饲料饲喂动物；揉丝处理11月初水稻秸秆可以提高其营养价值和瘤胃降解率。

关键词： 水稻秸秆; 揉丝; 瘤胃降解; 奶牛

本文引用格式

马钱波, 王琳, 李志威, 黄倩倩, 赵国琦 . 不同收获期揉丝水稻秸秆在奶牛瘤胃内的降解特性[J]. 动物营养学报, 2018 , 30(11) : 4695 -4703 . DOI: 10.3969/j.issn.1006-267x.2018.11.047

Abstract

This study was conducted to investigate the effects of knead wire treatment on the nutrient composition and degradation characteristics in rumen of rice straw at different harvest periods in dairy cows. The samples were harvested in late September and early November. These materials had the same pretreatment. Four samples were rice straw in late September, kneaded rice straw in late September, rice straw in early November and kneaded rice straw in early November, respectively. The contents of nutrients in the samples were determined, the dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) degradability of samples were determined by nylon-bag technique, and dynamic degradation parameters of nutrients were obtained. The results showed as follows:the CP and ash contents of rice straw in late September was higher than those of rice straw in early November. The degradability of CP, NDF and ADF of rice straw in late September was significantly higher than that of rice straw in early November after digestion in rumen (P<0.05). The effective degradation rate (ED) of DM, CP and ADF of rice straw in late September was not affected significantly by kneading (P>0.05). However, it can significantly improve the ED of DM, CP and ADF of rice straw in early November (P<0.05). In conclusion, the rice straw in late September is more suitable for feeding animal as a coarse fodder than that in early November. Treatment of rice straw harvested in early November by kneading can improve its nutritional value and rumen degradation rate.

Key words： rice straw; knead wire; rumen degradation; dairy cows

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