动物营养学报Issue(6)：1467-1476,10.DOI:10.3969/j.issn.1006-267x.2014.06.006
真胃灌注不同水平淀粉对泌乳后期奶牛采食量、泌乳性能、胃肠道发酵和血液代谢的影响
Effects of Graded Abomasal Starch Infusion on Feed Intake, Lactation Performance,Gastrointestinal Fermentation and Blood Metabolism of Lactating Cows
摘要
Abstract
This experiment was performed to assess the effects of infusion of graded starch in abomasum on feed intake,lactation performance,gastrointestinal fermentation and blood metabolism of lactating cows. Four Holstein cows fitted with permanent ruminal cannulas were arranged into four groups by a 4×4 Latin square de-sign. Cows were infused with 0,800,1 600 and 2 400 g / d starch in abomasum,respectively. The experiment lasted for 7 days,which was consisted of a 5-day pre-experimental period and a 2-day experimental period. The results showed as follows:1)dry matter intake of dairy cows was not affected by abomasal starch infusion at different levels(P>0.05);with the increase of abomasal starch infusion level,digestive energy intake( P =0.022)and net energy for lactation intake(P = 0.014)were linearly increased,while starch apparent digesti-bility was linearly decreased(P = 0.029). 2)With the increase of abomasal starch infusion level,milk fat per-centage(P = 0.024)and yield(P = 0.022)were quadratically increased,those in 1 600 g / d group reached the highest. 3)Butyric acid concentration in fecal fluid in 800 g / d group was significantly lower than that in 1 600 and 2 400 g / d groups(P<0.05),and total volatile fatty acid concentration was significantly lower than that in control group and 1 600 g / d group( P<0.05). 4)Ruminal fermentation and blood metabolism indices were not affected by abomasal starch infusion at different levels( P>0.05). In conclusion,milk fat percentage is quadratically increased with the increase of abomasal starch infusion level,and the peak amount of rumen es-caped starch that can be utilized by dairy cows at late lactation period is 1 600 g / d.关键词
淀粉灌注/采食量/泌乳性能/血液代谢/泌乳奶牛Key words
starch infusion/feed intake/lactation performance/blood metabolism/lactating cows分类
农业科技引用本文复制引用
邹杨,李胜利,曹志军,杨占山..真胃灌注不同水平淀粉对泌乳后期奶牛采食量、泌乳性能、胃肠道发酵和血液代谢的影响[J].动物营养学报,2014,(6):1467-1476,10.基金项目
国家自然科学基金项目 （）
