Rumen Degradation Characteristics of Commonly Used Roughages for Dairy Cows

XIA Ke; YAO Qing; LI Fuguo; LI Min; DUAN Chunyu; XI Weibin; ZHANG Yonggen

doi:10.3969/j.issn.1006-267x.2012.04.023

Chinese Journal of Animal Nutrition >

2012 , Vol. 24 >Issue 4: 769 - 777

DOI: https://doi.org/10.3969/j.issn.1006-267x.2012.04.023

Rumen Degradation Characteristics of Commonly Used Roughages for Dairy Cows

XIA Ke ,
YAO Qing ,
LI Fuguo ,
LI Min ,
DUAN Chunyu ,
XI Weibin ,
ZHANG Yonggen

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1. Northeast Agricultural University, College of Animal Science and Technology, Harbin 150030, China;
2. College of Animal Husbandry and Veterinary Medicine, Shenyang Agricultural University, Shenyang 110886, China

Received date: 2011-10-25

Online published: 2012-03-30

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Abstract

This trial was conducted to study the rumen degradation characteristics of seven types of roughages: two kinds of alfalfa (American Anderson level 1 alfalfa and Heilongjiang Gongnong No.1 alfalfa), two kinds of Leymus chinensis with different contents of weeds (10% or 34%), corn silage, corn stover silage and corn stover. Nylon-bag technique was used to evaluate the rumen degradation rates and effective degradabilities of dry matter (DM), crude protein (CP), and neutral detergent fiber (NDF) of these roughages. The results showed as follows: DM degradation rates of American Anderson level 1 alfalfa, corn silage and Heilongjiang Gongnong No.1 alfalfa at 72 h were not significantly different (P>0.05), and were significantly higher than those of the other roughages. DM effective degradability of American Anderson level 1 alfalfa was significantly higher than that of Heilongjiang Gongnong No.1 alfalfa, corn silage and corn stover silage (P<0.05); Leymus chinensis and corn stover had the lower DM effective degradability than others (P<0.05). CP degradation rate and effective degradability of American Anderson level 1 alfalfa were the highest at 72 h among seven types of roughages, and the degradation rate was significantly higher than that of Heilongjiang Gongnong No.1 alfalfa, corn silage, corn stover silage, Leymus chinensis with 10% weeds, corn stover and Leymus chinensis with 34% weeds (P<0.05). NDF degradation rates of corn silage and corn stover silage at 72 h were significantly higher than those of the other roughages (P<0.05), but NDF effective degradabilities of two kinds of alfalfa were higher and followed by corn stover silage and corn silage; both NDF degradation rate and effective degradability of Leymus chinensis with 34% weeds were the lowest. In conclusion, for the degradation characteristics of seven types of roughages: 1) American Anderson level 1 alfalfa has the highest nutritional value, while Leymus chinensis with 34% weeds and corn stover have the lowest; 2) the content of weeds affects the nutritional value of Leymus chinensis; 3) the process of making silage can improve the nutritional value of corn stover.

Key words： roughages; rumen degradation; dairy cows

Cite this article

XIA Ke , YAO Qing , LI Fuguo , LI Min , DUAN Chunyu , XI Weibin , ZHANG Yonggen . Rumen Degradation Characteristics of Commonly Used Roughages for Dairy Cows[J]. Chinese Journal of Animal Nutrition, 2012 , 24(4) : 769 -777 . DOI: 10.3969/j.issn.1006-267x.2012.04.023

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