文献类型： 外文期刊

作者： Xue, Ligang ¹ ; Wang, Dan ² ; Zhang, Fangyu ³ ; Cai, Liyuan ⁴ ;

作者机构： 1.Jilin Agr Sci & Technol Univ, Coll Anim Sci & Technol, Changchun 130118, Peoples R China

2.Jilin Agr Univ, Coll Vet Med, Changchun 130118, Peoples R China

3.Jilin Acad Agr Sci, Inst Anim Husb & Vet Med, Changchun 130033, Peoples R China

4.Huazhong Agr Univ, Coll Anim Sci & Technol, Dept Anim Nutr & Feed Sci, Wuhan 430070, Peoples R China

关键词： goats; prophylactic feeding; Clostridium butyricum; Saccharomyces cerevisiae; heat stress; rumen fermentation; growth performance

期刊名称：ANIMALS （ 影响因子：3.231； 五年影响因子：3.312 ）

ISSN： 2076-2615

年卷期： 2022 年 12 卷 18 期

页码：

收录情况： SCI

摘要： Simple Summary Heat stress occurs when goats are exposed to high environmental temperatures and humidity for a long period. Heat stress could adversely affect the rumen fermentation and growth performance of goats. Dietary supplementation with Clostridium butyricum, Saccharomyces cerevisiae, and their mixture were effective ways to alleviate the effects on the rumen fermentation and growth performance of heat-stressed goats. In this study, these two probiotics and their mixture were supplemented in goats for a period before heat stress. The results showed that these probiotics effectively alleviate the adverse effects of heat stress by promoting rumen fermentation and growth performance. Therefore, this study provides a reference for applying these two probiotics at the optimum timing to alleviate the adverse effects of heat stress on goats. This study aimed to investigate the effect of the prophylactic feeding of Clostridium butyricum (CB), Saccharomyces cerevisiae (SC), and their mixture before the onset of heat stress on the rumen fermentation and growth performance of goats, and subsequently, on heat stress status. Forty-eight male Macheng Black x Boer crossed goats (22.25 +/- 4.26 kg) were divided into four groups-the control group (fed the basal diet), and the CB (0.05% CB added to the basal diet), SC (0.60% SC added to the basal diet), and Mix (0.05% CB and 0.60% SC added to the basal diet) groups-and fed for fourteen days. Then, these goats were kept in a heat stress environment (with a temperature-humidity index of 87.04) for fourteen days. Then, the parameters of rumen fermentation and growth performance were measured. The results showed that the pH values, the activities of cellulolytic enzymes (avicelase, CMCaes, cellobiase, and xylanase), and the concentrations of ammonia-N, total volatile fatty acid, acetic acid, propionic acid, and butyric acid were significantly increased (p < 0.05) in the rumens of the CB, SC, and Mix groups compared to those of the control group. Moreover, the average daily gain and the digestibility of dry matter, neutral detergent fiber, and acid detergent fiber were significantly increased (p < 0.05) in the CB, SC, and Mix groups compared to those of the control group. These results suggest that these two probiotics and their mixture effectively alleviate the adverse effects of heat stress on rumen fermentation and growth performance via prophylactic feeding.