Correlation between Rumen Effective Degradation Rate and Degradation Rate at Various Time Points of Common Feedstuffs for Sheep

  • WANG Yufei ,
  • LI Sen ,
  • Suolangzhuoga ,
  • LUAN Yinyin ,
  • DANG Shibin ,
  • HE Liwen ,
  • ZHANG Wei
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  • 1. State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
    2. Agriculture and Animal Husbandry Service Center of Pubao Town, Bange County, Naqu City, Naqu 852500, China

Received date: 2020-10-29

  Online published: 2021-05-14

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Abstract

This experiment was conducted to simplify the determination of rumen effective degradation rate of feed. The rumen effective degradation rates of dry matter (DM) and crude protein (CP) of 25 kinds of sheep common feedstuffs (15 kinds of concentrate, 10 kinds of roughage) were determined by nylon bag method. Rumen degradation rate at a certain time point was screened to replace the effective degradation rate based on the relative error between the degradation rate at each time point and the effective degradation rate, and then the regression equation between the degradation rate at the selected time point and the effective degradation rate was established. The results showed as follows:1) the mean of the relative error between the degradation rate of DM or CP at 16 h and the effective degradation rate was the smallest for the 25 kinds of sheep common feedstuffs, they were 9.54% and 8.61%, respectively. 2) There was a significant linear correlation between the effective degradation rate (Y) of DM of the 25 kinds of feedstuffs and its degradation rate at 16 h (X) (Y=0.793 1X+10.767, R2=0.682 1, P<0.01, n=25); There was also a significant linear correlation between the effective degradation rate (Y) of CP of the 25 kinds of feedstuffs and its degradation rate at 16 h (X) (Y=0.761 8X+13.535, R2=0.821 0, P<0.01, n=25). Therefore, incubating in rumen for 16 h can reflect the rumen degradation of the feed. The rumen degradation rate at 16 h and the linear regression equation both can be used as a simplified method to determine the rumen effective degradation rate of feedstuff.

Cite this article

WANG Yufei , LI Sen , Suolangzhuoga , LUAN Yinyin , DANG Shibin , HE Liwen , ZHANG Wei . Correlation between Rumen Effective Degradation Rate and Degradation Rate at Various Time Points of Common Feedstuffs for Sheep[J]. Chinese Journal of Animal Nutrition, 2021 , 33(5) : 2804 -2814 . DOI: 10.3969/j.issn.1006-267x.2021.05.039

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