The present experiment was conducted to investigate the effects of combinations and proportions of combination-treated wheat straw (CW), maize straw silage (MS) and concentrate (CC) on rumen fermentation of dairy cows in vitro. CW, MS and CC were grouped in pairs, and 6 proportions (0:100, 20:80, 40:60, 60:40, 80:20 and 100:0) were set in each group. After the best combination of CW-MS was determined, the best combination of CW-MS was grouped with CC at the 6 proportions. Three replicates were set in each group. Fermentation characteristics were determined by short-term artificial rumen technique. The results showed as follows: there was no significant difference in pH among all treatments (P>0.05), and NH3-N concentration ranged within normal limits; the best combinations were CW:MS=40:60, CW:CC=60:40 and MS:CC=60:40, and the best combination of CW-MS:CC=80:20 considering indices of microbial protein (MCP) and volatile fatty acid (VFA) concentrations. In conclusion, the best combination of CW, MS and CC is 32:48:20.
SUN Guoqiang
,
LV Yongyan
,
CAI Lifeng
,
CUI Haijing
. Effects of Combinations and Proportions of Combination-Treated Wheat Straw, Maize Straw Silage and Concentrate on Rumen Fermentation of Dairy Cows in Vitro[J]. Chinese Journal of Animal Nutrition, 2013
, 25(1)
: 69
-76
.
DOI: 10.3969/j.issn.1006-267x.2013.01.010
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