Combined Effect of Corn Straw Silage, Chinese Wildrye, Oat Grass and Concentrate

  • ZHANG Yifan ,
  • LI Yan ,
  • LIU Tao ,
  • ZHENG Yulin ,
  • CAO Yufeng ,
  • GAO Yanxia ,
  • ZHANG Xiujiang ,
  • LIU Ze ,
  • LI Qiufeng ,
  • LI Jianguo
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  • 1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China;
    2. College of Veterinary Medicine, Hebei Agricultural University, Baoding 071001, China;
    3. Shijiazhuang Animal Health Inspection Institute, Shijiazhuang 050000, China;
    4. Embryo Engineering and Technological Center of Cattle and Sheep of Hebei, Baoding 071001, China;
    5. Baoding Animal Husbandry Workstation, Baoding 071000, China

Received date: 2019-02-13

  Online published: 2019-08-19

Abstract

The purpose of this experiment was to explore the optimal combined effect between mixed roughage (corn straw silage+Chinese wildrye+oat grass) and concentrate by in vitro gas production method. The single factor experiment design was used to screen the combined effect, the corn straw silage:Chinese wildrye:oat grass was 20:30:50, and the mixed roughage was combined with a concentrate at 100:0, 80:20, 60:40, 50:50, 40:60, 20:80 and 0:100, respectively, and each combination was repeated three times. In vitro gas production method was used to analyze the cumulative gas production and the changes of pH, dry matter degradation (DMD) and microprotein (MCP), ammoniacal nitrogen (NH3-N) and volatile fatty acids (VFA) contents in different combinations. The single combination effect index (SFAEI) and multiple combination effect index (MFAEI) were calculated. The results showed as follows:1) different combination ratios of mixed roughage to concentrate had significant effects on gas production (P<0.05), and the single combination effect index of gas production at 4 h was the largest in 80:20 group. 2) Different combination ratios of mixed roughage to concentrate had significant effect on pH (P<0.05), and the 0:100 group had the lowest effect. 3) Different combination ratios of mixed roughage to concentrate had significant effects on DMD (P<0.05), and the single combination effect index of DMD was the highest in 20:80 group. 4) The content of NH3-N was significantly affected by different combination ratios of mixed roughage to concentrate (P<0.05), and the single combination effect index of NH3-N content was the highest in 50:50 group. 5) Different combination ratios of mixed roughage to concentrate had significant effect on MCP content (P<0.05), and the highest single combination effect index of MCP content appeared in 50:50 group. 6) The effects of different combination ratios of mixed roughage to concentrate on acetic acid, propionic acid and butyric acid contents were significant (P<0.05). According to multiple combination effect index, the optimal combination ratio of corn straw silage:Chinese wildrye:oat grass:concentrate is 10:15:25:50.

Cite this article

ZHANG Yifan , LI Yan , LIU Tao , ZHENG Yulin , CAO Yufeng , GAO Yanxia , ZHANG Xiujiang , LIU Ze , LI Qiufeng , LI Jianguo . Combined Effect of Corn Straw Silage, Chinese Wildrye, Oat Grass and Concentrate[J]. Chinese Journal of Animal Nutrition, 2019 , 31(8) : 3853 -3862 . DOI: 10.3969/j.issn.1006-267x.2019.08.047

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