代乳粉对成年黔北麻羊瘤胃发酵及血浆生化指标的影响

韩娥; 吴文旋; 吴佳海; 王恒怡; 刘发翠

doi:10.11829/j.issn.1001-0629.2015-0749

代乳粉对成年黔北麻羊瘤胃发酵及血浆生化指标的影响

1.
贵州大学动物科学学院,贵州贵阳 550025
2.
1. 贵州大学动物科学学院,贵州贵阳 550025
3.
2. 贵州大学新农村发展研究院,贵州贵阳 550025
4.
5.
贵州省草业研究所,贵州贵阳 550006

基金项目:

贵州大学大学生创新创业训练计划项目(201510657012)

国家自然科学基金(31360563)

贵州山区牧草产业化生产技术研究集成与应用(黔科合重大专项字〔2014〕6017号)

贵州大学科技兴村人才培育基地建设项目

贵州省农业科技攻关项目(黔科合NY字[2009]3085)

摘要: 基于笔者所在课题组前期对饲喂代乳粉可以改善黔北麻羊羔羊生产性能的研究结果,本研究进一步分析代乳粉对瘤胃发酵及血浆生化指标的影响,以期为生产实践中应用代乳粉提供基础数据。本研究采用33拉丁方试验设计,将健康无病,体重、年龄一致的成年黔北麻羊6只分为3组(对照组、试验1组、试验2组),每组两个重复,每个重复1只羊,单笼饲喂。对照组饲喂基础饲粮,试验1组、试验2组在基础饲粮基础上分别添加2.5%、5%代乳粉。试验持续45 d,分3期,每期15 d,包括14 d预饲期和1 d采样期。结果显示,1)代乳粉对瘤胃液pH、微生物蛋白产量影响均不显著(P0.05);试验1组氨态氮浓度显著低于对照组(P0.05)。2)各组间瘤胃微晶纤维素酶、纤维二糖酶及木聚糖酶活数值差异均不显著(P0.05),但试验1组、试验2组羧甲基纤维素酶活水平显著高于对照组(P0.05)。3)试验1组、试验2组的瘤胃乙酸、丙酸、丁酸及总挥发性脂肪酸显著高于对照组(P0.05),试验2组数值高于试验1组;乙酸/丙酸显著低于对照组(P0.05)。4)试验2组血浆葡萄糖显著低于试验1组(P0.05)、总蛋白显著低于对照组(P0.05),其余血浆指标差异不显著(P0.05)。由此可见,补饲代乳粉可改善黔北麻羊瘤胃发酵参数及部分血浆生化指标;综合来看,以5%水平较好。

关键词:

English

Effects of milk replacer on rumen fermentation and plasma biochemical indices of adult Qianbeima goats

1.
College of Animal Science, Guizhou University, Guiyang 550025, China
2.
1. College of Animal Science, Guizhou University, Guiyang 550025, China
3.
2. Guizhou University,Institude for New Rural Development, Guiyang 550025, China
4.
5.
Guizhou Institute of Prataculture, Guiyang 550006, China

Received Date: 2015-12-29
Publish Date: 2016-10-19

Abstract: This study was conducted to evaluate the effects of milk replacer on rumen fermentation and plasma biochemical indices of Qianbeima adult goats based on our previous study revealing that milk replacer can improve growth performance of Qianbeima lambs. Six healthy goats were assigned to 33 Latin square design according to their age and body weight: control, treatment 1, and treatment 2. The goats in control were fed basal diet, while treatment 1 and treatment 2 were supplemented with 2.5%, 5% milk replacer, respectively. Experimental last 45 days including 3 phases with 14-day adaptation and 1-day sampling duration for each phase. The results showed that: 1) Feeding of nutritional fortifier had no significant difference (P0.05) for ruminal pH and MCP levels. The NH3-N concentration was found to be the lowest in treatment 1, which was significantly decreased than control (P0.05). 2) Ruminal activities of microcrystalline cellulose, cellobiase, and xylanase were unaffected for 3 treatments (P0.05), however, carboxymethyl cellulose level for treatment 1 and treatment 2 was significantly higher than control (P0.05). 3) Ruminal levels of acetic acid, propionate, butyrate, and total volatile fatty acid (TVFA) in treatment 1 and 2 were higher than control (P0.05); while A/P was decreased (P0.05). 4) Treatment 2 had a decreased (P0.05) plasma Glu level than treatment 1 and a decreased TG level than control. The other plasma metabolites (UN, TP, Alb, TC, and Cr) were unaltered by nutritional fortifier addition (P0.05). It was suggested that milk replacer could improve rumen fermentation parameters, cellulose activity, VFA levels, and some plasma metabolites for goats. Overall, addition of 5% level milk replacer was recommended in the practice.

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代乳粉对成年黔北麻羊瘤胃发酵及血浆生化指标的影响

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Effects of milk replacer on rumen fermentation and plasma biochemical indices of adult Qianbeima goats

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