The objective of this experiment was to investigate the effect of increasing dietary NFC/NDF on populations of B. fibrisolvens, S. bovis and M. elsdenii in the rumen of dairy goats induced subacute rumen acidosis (SARA). Six lactating Guanzhong dairy goats fitted with permanent rumen fistulae were used in an auto case-control design. This experiment consisted of four experimental periods, with ten days in each period. Goats were fed 4 diets with different NFC/NDF (1.02,1.24,1.63 and 2.58, respectively). The induction of SARA was conducted by gradually increasing dietary NFC/NDF. Real-time PCR was used to detect the populations of B. fibrisolvens, S. bovis and M. elsdenii. The results showed as follows: 1) the number of B. fibrisolvens and M. elsdenii was both increased with the gradual increasing of dietary NFC/NDF, and when NFC/NDF reached the level of 2.58, the number of M. elsdenii was significantly increased （P＜0.01）, whereas the number of B. fibrisolvens was significantly decreased （P<0.01）. 2) The number of S. bovis was significantly decreased with the gradual increasing of dietary NFC/NDF (P＜0.05), however, during SARA occurrence period, the number of S. bovis returned to the level in the experimental initial stage. The results indicated that there was no difference in the number of S.bovis at the induced stage of SARA，however, the number of B. fibrisolvens was sharply decreased，whereas the number of M. elsdenii which is a kind of aciduric bacteria was significantly increased.［Chinese Journal of Animal Nutrition, 2011, 23（10）：1716 -1724］
ZHAO Peiting,LIU Dacheng,GAO Min,HU Hong,ian3HAN Haoqi,ZHOU Xiangli,DENG Weikang,WANG Pengfei
. Effect of Different Dietary NFC/NDF on Populations of B. fibrisolvens,
S.bovis and M.elsdenii in Rumen of Dairy Goats[J]. Chinese Journal of Animal Nutrition, 2011
, 23(10)
: 1716
-1724
.
DOI: 10.3969/j.issn.1006-267x.2011.10.011
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