Correlation Analysis Between in Vitro Gas Production and Effective Degradation Rate of Common Concentrates for Mutton Sheep in Southern Xinjiang

MA Shaonan, XU Guishan, WANG Xiaohui, ZHANG Kai, PAN Xiaoli, MA Tao, DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2018.03.030

2018 , Vol. 30 >Issue 3: 1052 - 1062

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.03.030

Molecular Nutrition

Correlation Analysis Between in Vitro Gas Production and Effective Degradation Rate of Common Concentrates for Mutton Sheep in Southern Xinjiang

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1. College of Animal Science, Tarim University, Alar 843300, China;
2. Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
3. Key Laboratory of Tarim Animal Husbandry Science and Technology, Xinjiang Production and Construction Corps, Alar 843300, China

Received date: 2017-09-12

Online published: 2018-03-05

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Abstract

In order to explore the simple method for evaluating effective degradation rate (ED) of dry matter (DM) of concentrate, the correlation analysis between in vitro gas production(GP) and ED of common concentrates for mutton sheep in southern Xinjiang was carried out. Six kinds of protein feedstuffs and 7 kinds of energy feedstuffs were used as experimental material. GP and ED of DM were detected by in vitro GP method and continuous artificial rumen fermentation method. In the meantime, the effects of common nutrients on ED of DM as well as the correlation between GP and ED of DM were analyzed. Estimation models based on GP and common nutrients to predict ED of DM were established. The results showed as follows:1) potential GP and 8, 16, 24, 30, 36 and 48 h GP had positive correlations with ED of DM (P<0.05); the correlation efficiencies of prediction models of ED of DM based on potential GP, and GP at 24 and 36 h were higher, and the coefficients of determination (R²) were 0.553, 0.613 and 0.612, respectively. 2) In results of correlation analysis between common nutrient contents and ED of DM, ED of DM had significantly negative correlations with neutral detergent fiber (NDF) (P<0.05) and acid detergent fiber (ADF) contents (P<0.01); single factor and two factors estimation models for ED of DM were established based on ADF and NDF contents, and the two factors estimation model[ED_IVDMD=88.481-0.484ADF-0.231NDF (P<0.01, R²=0.855)(ED_IVDMD was ED of DM)] had higher R². In conclusion, in vitro GP method can replace the nylon bag method to estimate ED of DM, and make a quick, reasonable and effective evaluation on the degradation characteristic of common concentrate feedstuffs for mutton sheep; fiber content in feedstuffs can be used to predicate degradation rate of other main nutrients in rumen.

Key words： in vitro gas production; continuous artificial rumen fermentation; gas production; effective degradation rate of dry matter; concentrate; estimation model

Cite this article

MA Shaonan, XU Guishan, WANG Xiaohui, ZHANG Kai, PAN Xiaoli, MA Tao, DIAO Qiyu . Correlation Analysis Between in Vitro Gas Production and Effective Degradation Rate of Common Concentrates for Mutton Sheep in Southern Xinjiang[J]. Chinese Journal of Animal Nutrition, 2018 , 30(3) : 1052 -1062 . DOI: 10.3969/j.issn.1006-267x.2018.03.030

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