Effects of Different Dietary Fiber and Protein Levels on Nutrient Digestion and Metabolism, and Plasma Biochemical Indices of 12 Months Old Yanqi Horse

LIU Kai; LI Xiaobin; CHEN Xueji; XU Xiangjun; Aersilin; YANG Kailun

doi:10.3969/j.issn.1006-267x.2016.04.040

2016 , Vol. 28 >Issue 4: 1274 - 1284

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.04.040

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Effects of Different Dietary Fiber and Protein Levels on Nutrient Digestion and Metabolism, and Plasma Biochemical Indices of 12 Months Old Yanqi Horse

LIU Kai ,
LI Xiaobin ,
CHEN Xueji ,
XU Xiangjun ,
Aersilin ,
YANG Kailun

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1. College of Animal Science, Xinjiang Agricultural University, Xinjiang Key Laboratory of Meat & Milk Production Herbivore Nutrition, Urumqi 830052, China;
2. Mongolian Autonomous Prefecture Bayinguoleng Baoqi Stud Farm of Yanqi Horse, Yanqi 841100, China

Received date: 2015-11-03

Online published: 2016-04-11

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Abstract

This test mainly studied the effects of different dietary fiber and protein levels on nutrient digestion and metabolism, and plasma biochemical indices of 12 months old Yanqi horse. Twenty health Yanqi male horses with the age of 12 months old and the average body of(191±20) kg were randomly divided into 2 groups, each group of 6 horses. Used the method of staging group, trail group Ⅰ and trail group Ⅱ were arranged in stage 1, and trail group Ⅲ and trial group Ⅳ were arranged in stage 2. Horses in the 4 groups were fed with different fiber and protein level diets(the levels of fiber and protein in the diets were 76.59% and 6.81%, 74.21% and 7.88%, 71.82% and 8.94%, 69.41% and 10.01%, respectively). The digestion and metabolism experiment lasted for 21 d, comprised a 15 d adaptation period and 6 d trial period. The results showed that the intakes of dry matter(DM), organic matter(OM), crude protein(CP), calcium(Ca), phosphorus(P) of the Yanqi horse all showed increasing trends with the dietary protein level increasing, but the intakes of neutral detergent fiber(NDF) and acid detergent fiber(ADF) showed decreasing trends. The digestibility of the DM, OM, CP and Ca, and digestible energy(DE) and metabolism energy(ME) of Yanqi horse was increased with the dietary protein level increasing. Among them, the digestibility of Ca of trial groups Ⅱ, Ⅲ and Ⅳ was increased by 10.78%(P>0.05), 19.48%(P>0.05) and 7.46%(P>0.05) compared with trial group Ⅰ, respectively; the ME of trial groups Ⅱ and Ⅲ was significantly higher than that of trial groups Ⅰ and Ⅱ(P<0.05). In aspect of nitrogen, Ca and P metabolism, the retention rates of Ca and P of Yanqi horse were increased, but increasing the dietary protein level had no significant effect on nitrogen retention rate; the contents of total protein(TP), albumin(ALB), globulin(GLB), urea nitrogen(UN) and glutamine(Gln) in plasma were not significantly different among all groups(P>0.05). Therefore, increasing the dietary protein level can increase the intakes of nutrients, improve nutrient digestibility and retention, but can not affect plasma biochemical indices, and the optimal levels of fiber and protein in the diet are 69.41% and 10.01%, respectively.

Key words： diet; Yanqi horse; fiber; protein; digestion and metabolism; plasma biochemical indices

Cite this article

LIU Kai , LI Xiaobin , CHEN Xueji , XU Xiangjun , Aersilin , YANG Kailun . Effects of Different Dietary Fiber and Protein Levels on Nutrient Digestion and Metabolism, and Plasma Biochemical Indices of 12 Months Old Yanqi Horse[J]. Chinese Journal of Animal Nutrition, 2016 , 28(4) : 1274 -1284 . DOI: 10.3969/j.issn.1006-267x.2016.04.040

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