Effects of Diets with Different Ratios of Non-Fibrous Carbohydrate to Neutral Detergent Fiber on Morphological Development of Compound Stomach of Plateau Type Tibetan Sheep

ZHOU Li; LI Xueqing; WANG Zhiyou; HOU Shengzhen; YANG Baochun; GUI Linsheng

doi:10.3969/j.issn.1006-267x.2021.02.039

2021 , Vol. 33 >Issue 2: 986 - 998

DOI: https://doi.org/10.3969/j.issn.1006-267x.2021.02.039

Effects of Diets with Different Ratios of Non-Fibrous Carbohydrate to Neutral Detergent Fiber on Morphological Development of Compound Stomach of Plateau Type Tibetan Sheep

ZHOU Li ,
LI Xueqing ,
WANG Zhiyou ,
HOU Shengzhen ,
YANG Baochun ,
GUI Linsheng

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1. College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China;
2. College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China

Received date: 2020-07-06

Online published: 2021-02-04

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Abstract

This experiment was conducted to investigate the effect of diets with different ratios of non-fibrous carbohydrate to neutral detergent fiber (NFC/NDF) on the morphological development of compound stomach of plateau type Tibetan sheep. Thirty healthy 4-month-old Tibetan sheep with 2 to 4 parities under similar body weight [(26.38±0.43) kg] were randomly divided into six groups according to gender: three raw groups (M1 group, M2 group and M3 group) and three ewe group (F1 group, F2 group and F3 group), and each group had five sheep. They were fed diets with NFC/NDF of 2.20 (concentrate to forage ratio of 70:30, F1 group and M1 group), 1.39 (concentrate to forage ratio of 50:50, F2 group and M2 group) and 0.92 (concentrate to forage ratio of 30:70, F3 group and M3 group), respectively. The feeding experiment was conducted for a period of 105 d, including 15 d pre-test period and 90 d test period. The results showed as follows: 1) for the tissue morphology of rumen, the corneum thickness, granular layer thickness, nipple length, nipple width, muscular thickness and central muscular thickness of rams were negatively correlated with dietary NFC/NDF; the corneum thickness, granular layer thickness, nipple length, nipple width and muscular thickness of ewes in F3 group were significantly greater than those in F1 group (P<0.05). 2) For the tissue morphology of reticulum, the corneum thickness, granular layer thickness and nipple width of rams in M3 group were significantly greater than those in M1 group (P<0.05); the corneum thickness, granular layer thickness, papilla length, papilla width and central muscular thickness of ewes in F3 group were significantly greater than those in F1 group (P<0.05). 3) For the tissue morphology of omasum, the corneum thickness, granular layer thickness, papilla length, papilla width, muscular thickness and central muscular thickness of Tibetan sheep increased with the decrease of dietary NFC/NDF. The central muscular thickness of ewes in F3 group was significantly greater than that in F1 group (P<0.05). 4) For the tissue morphology of abomasum, the corneum thickness, mucosal layer thickness, submucosa thickness and muscular thickness of rams in M3 group were the highest, and the submucosa thickness of rams in M2 group and M3 group was significantly greater than that in M1 group (P<0.05); the mucosal layer thickness, submucosa thickness and muscular thickness of ewes in F3 group were significantly greater than those in F1 group and F2 group (P<0.05). In summary, dietary NFC/NDF has effects on the tissue morphology of rumen, reticulum, omasum and abomasum of plateau type Tibetan sheep, and the morphological development of compound stomach of the Tibetan sheep fed diet with NFC/NDF of 0.92 is better than the Tibetan sheep fed diets with NFC/NDF of 2.20 and 1.39.

Key words： dietary concentrate to forage ratio; NFC/NDF; plateau type Tibetan sheep; compound stomach; tissue morphology

Cite this article

ZHOU Li , LI Xueqing , WANG Zhiyou , HOU Shengzhen , YANG Baochun , GUI Linsheng . Effects of Diets with Different Ratios of Non-Fibrous Carbohydrate to Neutral Detergent Fiber on Morphological Development of Compound Stomach of Plateau Type Tibetan Sheep[J]. Chinese Journal of Animal Nutrition, 2021 , 33(2) : 986 -998 . DOI: 10.3969/j.issn.1006-267x.2021.02.039

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