Meta分析方法优化泌乳奶牛日粮碳水化合物平衡指数

doi:10.11843/j.issn.0366-6964.2014.09.011

摘要/Abstract

摘要：

利用Meta分析方法优化泌乳奶牛日粮粗饲料中性洗涤纤维(FNDF)及瘤胃可降解淀粉(RDS)供应，旨在为保障奶牛的瘤胃健康与高产提供理论依据。作者整理39篇关于日粮FNDF及RDS调控泌乳奶牛瘤胃健康及泌乳性能的文献。以日粮FNDF与RDS比值(CBI_R)及二者采食量之差(CBI_D)分别作为碳水化物平衡指数(CBI)，采用Meta分析方法研究CBI与瘤胃pH、瘤胃发酵参数、乳脂率及饲料效率的回归关系。分析表明，CBI_D和CBI_R与上述指标呈较好的线性或二次回归关系。日粮CBI_D和CBI_R分别高于1.09 kg•d^－1和1.28可使瘤胃pH≥6.16，减小亚急性瘤胃酸中毒发生的概率；保证较高泌乳效率(≥1.5)、乳脂率(≥3.5%)及正常瘤胃发酵模式(乙酸丙酸比≥2.2∶1~3∶1)的CBI_D和CBI_R范围分别为－0.42~0.99 kg•d^－1和0.93~1.30。本研究通过Meta分析方法获得保证瘤胃健康及高效生产日粮CBI_D和CBI_R范围，二者均能较好反映瘤胃健康及生产性能参数的变化。

Abstract:

The objective of the present study was to optimizing the dietary forage NDF (FNDF) and rumen degradable starch (RDS) content and ratios by using the meta-analysis in dairy cows.We collected 39 peered review manuscripts，which were related to FNDF or RDS content on rumen health and milk performance in dairy cows.In this study，we adopted FNDF to RDS ratio (CBI_R) or their intake difference (CBI_D) as carbohydrate balance indexes (CBI)，and evaluated their regression relationship to the ruminal pH，fermentation characteristics，milk fat and feed efficiency.The results revealed that the CBI_R and CBI_D showed strong linear or quadratic correlation with the dependent variables.Dietary CBI_R and CBI_D above 1.28 or 1.09 kg•d^－1 could minimize the risk of subacute ruminal acidosis，respectively.To obtain appropriate feed efficiency (≥1.5)，milk fat (≥3.5%) and acetate to propionate ratio (2.2:1-3:1) in dairy cows，the CBI_D and CBI_Rshould be set in the range of －0.42-0.99 kg•d^-1 and 0.93-1.30，respectively.In this study，the appropriate CBI_D and CBI_R ranges were calculated based on meta-analysis，the CBI_Dand CBI_Rcan reflect the change of rumen health and performance of dairy cow.

中图分类号:

S816.4

李飞，徐明，曹阳春，孙菲菲，杨昕涧，姚军虎，李东清. Meta分析方法优化泌乳奶牛日粮碳水化合物平衡指数[J]. 畜牧兽医学报, 2014, 45(9): 1457-1466.

LI Fei，XU Ming，CAO Yang-chun，SUN Fei-fei，YANG Xin-jian，YAO Jun-hu，LI Dong-qing. Meta-analysis to Optimizing Dietary Carbohydrate Balance Index in Lactating Dairy Cow[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2014, 45(9): 1457-1466.

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