RESEARCH PAPER

Prediction Models of Dietary Nutrient Apparent Digestibility of Mutton Sheep & Goats Based on Database and Analysis of Influencing Factors

  • LI Jinhui ,
  • CHEN Jiaxin ,
  • YAN Hui ,
  • LIU Jie ,
  • WANG Liyan ,
  • TIAN Xingzhe ,
  • YANG Caihong ,
  • LIU Yueqin ,
  • JI Shoukun ,
  • ZHANG Yingjie
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  • 1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China;
    2. Shijiazhuang Academy of Agricultural and Forestry Sciences, Shijiazhuang 050041, China

Received date: 2021-11-16

  Online published: 2022-07-14

Abstract

The purpose of this study was to build a database by searching the literature, establish prediction models of nutrient apparent digestibility in mutton sheep & goats and analyze its influencing factors. By searching the literature databases of Web of Science, PubMed, CNKI, etc., the literatures containing nutrient apparent digestibility in mutton sheep & goat diets were collected, and the relevant data were extracted to construct the database. The prediction models of dry matter apparent digestibility (DMD), gross energy apparent digestibility (GED), crude protein apparent digestibility (CPD), neutral detergent fiber apparent digestibility (NDFD) and acid detergent fiber apparent digestibility (ADFD) were constructed by multiple regression method, the accuracy of the models was evaluated, and the influencing factors of nutrient apparent digestibility in mutton sheep & goats were analyzed by variance decomposition method. The results showed as follows:a total of 99 literatures and 4 179 data were included in this study, and a database containing DMD, GED, CPD, NDFD and ADFD and their potential influencing factors was constructed. The DMD, GED, CPD, NDFD and ADFD were (66.13±8.63)%, (63.81±10.23)%, (64.18±9.31)%, (52.57±12.13)% and (46.11±12.14)%, respectively. Correlation analysis showed that the nutrient apparent digestibility in mutton sheep & goats was affected by metabolic weight (MBW), relative body maturity (RM), average daily gain (ADG), dry matter intake (DMI), dietary metabolizable energy (ME), dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) contents. The prediction models of DMD, GED, CPD, NDFD and ADFD in mutton sheep & goats constructed in this study could explain 65.0%, 95.0%, 67.0%, 51.0% and 47.0% of the variation, respectively, the mean bias (MB) were 0.332, 6.346, -0.469, -0.073 and 0.098 percentage points, respectively, and the root mean square prediction error (RMSPE) were 7.1%, 23.1%, 8.3%, 17.5% and 20.2%, respectively. The variance decomposition results showed that MBW and DMI were the most important influencing factors of DMD; the main influencing factors of GED were RM and dietary DM content; the main influencing factors of CPD were DMI, ADG and MBW; the main influencing factors of NDFD and ADFD were dietary CP, DM contents, MBW and RM. In this study, the prediction models of nutrient apparent digestibility in mutton sheep & goats are obtained, and their main influencing factors are analyzed, which can provide parameters for the study of nutritional requirements and precise feeding of mutton sheep & goats in China.

Cite this article

LI Jinhui , CHEN Jiaxin , YAN Hui , LIU Jie , WANG Liyan , TIAN Xingzhe , YANG Caihong , LIU Yueqin , JI Shoukun , ZHANG Yingjie . Prediction Models of Dietary Nutrient Apparent Digestibility of Mutton Sheep & Goats Based on Database and Analysis of Influencing Factors[J]. Chinese Journal of Animal Nutrition, 2022 , 34(7) : 4540 -4549 . DOI: 10.3969/j.issn.1006-267x.2022.07.043

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