Effect of β-carotene on selected indices of in vitro rumen fermentation in goats
Three goats fitted with rumen fistula were used as donors of rumen fluid. Substrates were incubated in vitro with buffered rumen fluid for 24 h. Different levels of P-carotene (five groups: 10, 50,100,200, 500 mg/1) were added as five treatment groups to determine whether it affected rumen fermentation in vitro as compared with blank samples used as controls. NH3-N concentrations with 50,100 and 200 mg β-carotene/1 group were found significantly lower than that in blank samples (P＜0.01). Microbial protein concentrations in all β-carotene-added groups were higher than in blanks, while those found in 200 and 500 mg/1 groups were significantly higher (P＜0.05 and 0.01, respectively). Total VFAs seemed not to be affected by added β-carotene (P＞0.05), although propionate and butyrate concentrations changed. It is concluded that β-carotene can enhance the utilization of NH3-N by rumen microorganisms and thus promote their growth in vitro.
β-carotene rumen fermentation goat in vitro
H.-X.Yan L.-S.Sun G.-Q.Zhao
College of Animal Science and Technology, Yangzhou University Yangzhou 225009, P.R.China
国际会议
The 7tb International Symposium on the Nutrition of Herbivores(ISNH-7)(第七届国际草食动物营养研讨会)
北京
英文
1081-1085
2007-09-16（万方平台首次上网日期，不代表论文的发表时间）