Taking high activity microbial flora as samples ,which from sludge of digesters and pristine wetland selected in typical habitats of Heilongjiang province enriched in low temperatures ,taking mixture of cow dung and straw as raw material ,according to different proportion of TS to set up five matched groups ,the experi-ment on characteristics of biogas production in anaerobic digestion of mixture in alpine region was conducted under constant temperature of 20℃ .The results showed that mixed fermentation was an effective way to im-prove anaerobic fermentation .Biogas production showed best at cow dung and straw was 3 :1 ,the higher the proportion of straw ,the lower biogas production .Under the condition of the same of TS and temperature ,bio-gas production and content of biogas of the order were :T2> T3> T4> T5> T1 and T2> T5> T3> T4> T1 .% 选取黑龙江省典型生境沼气池污泥和原始湿地淤泥,经低温富集后活性较高的菌种样品,采用牛粪和稻秆混合作为原料,根据TS不同比例,设置5个配比组,在20℃恒定温度下,研究了寒区混料配比产沼气工艺特性.结果表明：混合发酵是提高厌氧发酵效果的有效方法.其中以粪草比3∶1产气效果最好,而稻秆比例越高,产气量越低.在保持相同发酵浓度和温度的条件下,其产气量以及甲烷含量的大小顺序为：T2>T3> T4> T5> T1,T2> T5> T3> T4> T1.
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