Degradation Characteristics of Common Roughage and Roughage Forage in the Rumen of Dairy Cows

LIU Yanfang, MA Jian, DU Wen, WANG Yajing, CAO Zhijun, LI Shengli, YU Xiong

doi:10.3969/j.issn.1006-267x.2018.04.045

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 4: 1592 - 1602

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.04.045

Molecular Nutrition

Degradation Characteristics of Common Roughage and Roughage Forage in the Rumen of Dairy Cows

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1. College of Animal Science and Technology, Xinjiang Agricultural University, Urumqi 830052, China;
2. State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2017-09-30

Online published: 2018-04-03

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Abstract

In order to provide references when making formulas for dairy cows, this experiment was conducted to investigate the rumen degradation characteristics of 10 roughages including alfalfa silage, whole wheat silage, whole corn silage, alfalfa hay, oat hay (2 kinds), rice straw, peanut vine, millet straw and wheat straw. Nylon-bag technique was used to evaluate the degradation rates and effective degradability of dry matter, crude protein, neutral detergent fiber and acid detergent fiber in 72 h. The results showed as follows:dry matter effective degradability of alfalfa silage (58.24%) was the highest, and to the contrary, that of wheat straw (34.20%) was the minimum. Crude protein effective degradability of alfalfa hay was the highest, and was significantly higher than that of whole wheat silage, alfalfa silage, whole corn silage, oat hay, rice straw, wheat straw, millet straw and peanut vine (P<0.05), which was decreased in the above order. Neutral detergent fiber effective degradability of whole wheat silage was not significantly different from whole corn silage,alfalfa hay and oat hay (P>0.05), but was significantly higher than that of other roughages (P<0.05). Acid detergent fiber effective degradability of whole wheat silage was significantly higher than that of other roughages (P<0.05). It is concluded that the rumen degradation rate of alfalfa hay and alfalfa silage is higher, so they have better nutritional value; wheat straw and millet straw had low nutritional quality, and compared with them, peanut vine possesses certain advantages.

Key words： dairy cow; roughage; rumen; effective degradability

Cite this article

LIU Yanfang, MA Jian, DU Wen, WANG Yajing, CAO Zhijun, LI Shengli, YU Xiong . Degradation Characteristics of Common Roughage and Roughage Forage in the Rumen of Dairy Cows[J]. Chinese Journal of Animal Nutrition, 2018 , 30(4) : 1592 -1602 . DOI: 10.3969/j.issn.1006-267x.2018.04.045

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