畜牧与饲料科学Issue(9)：41-46,6.
日粮不同NFC/NDF比对奶山羊瘤胃pH值、挥发性脂肪酸及乳酸含量的影响
Effects of Different Dietary NFC/NDF Ratios on Ruminal pH,VFA and Lactate Content in Dairy Goats
摘要
Abstract
To explore the effects of different dietary NFC/NDF ratios on ruminal fermentation parameters,6 Guanzhong dairy goats with permanent rumen cannula were divided into 4 groups （4 trial periods） and each period lasted for 10 d according to self-contrast experiment design.The goats were fed diets with different NFC/NDF ratios,which were 1.02 （periodⅠ）,1.24 （periodⅡ）,1.63 （periodⅢ） and 2.58 （periodⅣ）,respectively.The results showed that with the increase of dietary NFC/NDF ratios,ruminal pH decreased,at the same time, the rate and degree of pH decline and duration time for pH lower than 5.2, 5.5,5.8 and 6.0 were increased.Ruminal propionate,butyrate and TVFA content tended to increase,while ruminal acetate content and A/P ratio tended to decrease.Plasma acetate, propionate,butyrate and TVFA content tended to increase.When NFC/NDF ratio was 2.58,duration time of ruminal pH between 5.2 and 5.5 could last for more than 7 h per day.In this case,ruminal lactate content remained at a low level,blood and ruminal TVFA content increased significantly （P0.05）.The results indicated rumen fermentation pattern was changed with the increase of dietary NFC/NDF ratios which caused acid environment in rumen;the accumulation of TVFA was the main reason for pH decrease but not lactate itself;when NFC/NDF ratio was 2.58,SARA occurred in dairy goats.关键词
日粮NFC/NDF比/奶山羊/瘤胃/pH值/挥发性脂肪酸/乳酸/亚急性瘤胃酸中毒Key words
dietary NFC/NDF ratios/dairy goats/rumen/pH/VFA/lactate/SARA分类
农业科技引用本文复制引用
胡红莲,卢德勋,刘大程,珊丹,李胜利,张春华,石岩..日粮不同NFC/NDF比对奶山羊瘤胃pH值、挥发性脂肪酸及乳酸含量的影响[J].畜牧与饲料科学,2011,(9):41-46,6.基金项目
国家自然科学基金 （）
内蒙古自治区自然科学基金 （）
