Effects of mixed silage containing corn straw and rape on the <i>in vitro</i> fermentation characteristics of rumen fluid from Tan sheep

FENG Fan; LI Hao; YANG Jie; GAO Qiaoxian; YANG Yi; ZHANG Juan; WANG Jing; ZHANG Jianyong; XIN Guosheng

doi:10.11829/j.issn.1001-0629.2020-0242

Pratacultural Science > 2020 > 37(11): 2343-2350. > DOI: 10.11829/j.issn.1001-0629.2020-0242

FENG F, LI H, YANG J, GAO Q X, YANG Y, ZHANG J, WANG J, ZHANG J Y, XIN G S. Effects of mixed silage containing corn straw and rape on the fermentation characteristics of rumen fluid from Tan sheep. Pratacultural Science, 2020, 37(11): 2343-2350 . DOI: 10.11829/j.issn.1001-0629.2020-0242

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Effects of mixed silage containing corn straw and rape on the in vitro fermentation characteristics of rumen fluid from Tan sheep

FENG Fan^1,2,3,,
LI Hao^1,2,3,
YANG Jie^1,2,3,
GAO Qiaoxian^1,2,3,
YANG Yi^1,2,3,
ZHANG Juan⁴,
WANG Jing⁵,
ZHANG Jianyong⁶,
XIN Guosheng^1,2,3, ,

1.
School of Life Science, Ningxia University, Yinchuan 750021, Ningxia, China
2.
Ningxia Feed Engineering Technology Research Center, Yinchuan 750021, Ningxia, China
3.
Key Laboratory of Ministry of Education for Conservation and Utilization of Special Biological Resources in the Western China, Yinchuan 750021, Ningxia, China
4.
School of Agricultural, Ningxia University, Yinchuan 750021, Ningxia, China
5.
Ningxia Haobiao Analysis and Testing Research Institute, Yinchuan 750021, Ningxia, China
6.
Ningxia Livestock Station, Yinchuan 750021, Ningxia, China

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Corresponding author:
XIN Guosheng　E-mail: gsxin@nxu.edu.cn
Received Date: May 06, 2020
Accepted Date: August 09, 2020
Available Online: October 23, 2020
Published Date: November 14, 2020

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Abstract

Abstract

The objective of this study was to evaluate the effects of dietary supplementation with rape on the in vitro fermentation of rumen fluid from Tan sheep. Rape, which has a high water content, was mixed with yellow corn straw in various ratios to produce silage containing 50%, 55%, 60%, 65%, and 70% moisture; unmixed yellow corn straw was used as the control group. Samples underwent 60 days of in vitro fermentation in sealed containers containing rumen fluid from Tan sheep, with three repeats in each group, after which they were analyzed. The results showed that the dry matter digestibility (DMD) increased with the proportion of rape (P < 0.05); the lowest DMD was 48.01% in the control group, and the highest DMD was 66.81% in the 70% moisture group. There was no significant difference in neutral detergent fiber digestibility between groups ( P > 0.05). Gas production was significantly higher in the experimental groups than in the control group ( P < 0.05), but there was no significant difference among the five experimental groups ( P > 0.05). There were no significant differences between groups in terms of pH value, ammonia–nitrogen (NH ₃-N) concentration, total volatile fatty acid concentration, or levels of acetic, propionic, butyric, isobutyric, or isovaleric acids (P > 0.05). In conclusion, the silage mix with 70% moisture content (79.45∶20.55 ratio of rape to corn straw) had the best effects on in vitro fermentation. However, the ideal proportion of rape to be included in mixed silage for Tan sheep needs to be determined using feeding experiments.
- rape,
- Tan sheep,
- in vitro fermentation,
- degradability,
- in vitro gas production,
- NH₃-N,
- VFA

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References

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Effects of mixed silage containing corn straw and rape on the in vitro fermentation characteristics of rumen fluid from Tan sheep

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