The invention provides a low-temperature degradation 
straw composite 
microbial agent containing 
Saccharomyces cerevisiae. The composite 
bacterial agent uses 6 strains, so that the corn stalk maturitydays can be increased by 2 to 3 days in an environment with the 
outdoor temperature of 1 to 6 DEG C, and then the composite 
bacterial agent is particularly suitable for northern regions. Compared withthe control group, the average 
milk yield of cows fed with corn 
straw treated with compound 
bacteria is increased by 8.9kg, the content of crude fibers in cow 
manure is decreased by 3.4%, and the average 
daily intake is increased by 2.3kg, because the compound 
bacteria for degrading lignocelluloses is added, and a large amount of 
Saccharomyces cerevisiae is contained in the compound 
bacteria, thecorn 
straw has soft texture and acid 
aroma, and the 
palatability is obviously improved to increase the 
appetite of 
livestock. Furthermore, the 
Saccharomyces cerevisiae can promote animal growth, regulate normal 
gastrointestinal flora and maintain microecological balance, thereby having the effects of improving gastrointestinal functions, increasing food digestibility and biological values, reducing 
serum cholesterol, controlling endotoxin, inhibiting the growth of 
spoilage bacteria in intestinal tracts and improving the 
immunity of bodies and the like so as to further increase the daily output.