This study was conducted to investigate the effects of different exogenous oligosaccharides on rumen microflora of dairy goats. Six Laoshan dairy goats with an average body weight of (32.80±2.45) kg, fitted with permanent rumen cannula, were used in a staging and grouping design. The goats were fed a basal diet (control group) and the basal diet supplemented with 1% mannose-oligosaccharides (group MOS), galactomannan-oligosaccharides (group GMOS), xylo-oligosaccharides (group XOS), isomalto-oligosaccharides (group IMO) and fructo-oligosaccharides (group FOS), respectively. The experiment consisted of 4 stages with 23 d in each stage and 14-day pre-experimental period followed with 9-day experimental period per stage. Rumen liquid was collected for the analysis of number of total bacteria, cellulose-decomposing bacteria, protozoa and fungi after 0 h(before feeding), 2, 4, 6, 8 and 10 h(before feeding) of feeding in the morning. The results showed as follows: compared with the control group, the number of rumen liquid total bacteria in experimental groups trended to increase, but only that in the group MOS (0 h) was significantly increased (P<0.05); the number of rumen liquid cellulose-decomposing bacteria in experimental groups was increased, and that in groups MOS (0 h), GMOS (0, 2 and 4 h) and FOS (0, 2 and 4 h) was significantly higher than that in the control group (P<0.05); the number of rumen liquid protozoa in experimental groups was increased, and that in groups MOS (2 and 4 h) and XOS (4 h) was significantly increased (P<0.05); the number of rumen liquid fungi in experimental groups was increased, and there were significant increments in groups GMOS and FOS (0 h, P<0.01), as well as in groups MOS (2 h), IMO (2 h), FOS (2 h), MOS (4 h)and FOS (6 h)(P<0.05). The number of rumen liquid total bacteria, cellulose-decomposing bacteria and protozoa trended to decrease at first and then increase, but that of fungi showed an opposite trend. The results indicate that different exogenous oligosaccharides have different effects on rumen microflora, furthermore, the improvements of mannose-oligosaccharides, galactomannan-oligosaccharides and fructo-oligosaccharides on rumen liquid cellulose-decomposing bacteria, protozoa, and fungi are more obvious.
QI Ru, WEN Jianxin, CHENG Ming, WANG Wenxing, XIAO Yu, CHU Yongkang, LIN Yingting
. Different Exogenous Oligosaccharides Affect Rumen Microflora of Laoshan Dairy Goats[J]. Chinese Journal of Animal Nutrition, 2012
, 24(2)
: 349
-357
.
DOI: 10.3969/j.issn.1006-267x.2012.02.023
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