摘要
[目的]筛选降解秸秆的优势菌。[方法]通过室内试验模拟秸秆在土壤中的状态,观测不同时期秸秆上微生物的变化及不同土层中碱解氮和总糖含量的变化。[结果]秸秆降解40 d时,优势菌中真菌所占比例较大,降解60 d时,细菌优势菌所占比例较大,其中菌株j-15、14和木霉12的数量占优势;第2层土壤中细菌数量最多,其次为第3和第6层,表层和底层土壤中细菌数量最少;表层土壤中真菌种类较多,第2和第3层土壤中木霉占绝对优势,其他菌层以毛霉为主。[结论]第3层土壤中优势菌较多,碱解氮和总糖含量最高;分离出的细菌以球菌为主,真菌以木霉为主。
[ Objective ] The study was to select the dominant degrading microorganisms of straw. [ Method ] The changes of microorganisms on straw and the contents of available nitrogen and total sugar in different soil layers were observed through laboratory simulation on straw state in soil. [ Result ] After 40 d of degradation, the ratio of fungi to dominant microorganisms was bigger. After 60 d of degradation, the ratio of bacteria to dominant microorganisms was bigger, in which the number of strains j-15, 14 and trichoderma12 was predominated. The bacterial number in the second soil layer was the most, and the following was that in the third and the sixth soil layers, and that in surface and subsurface soil was the least. Fungi species in surface soil was more, and the trichoderma in the second and the third soil layers occupied absolute predominance, other fungus layers were dominated by mucor. [ Conclusion ] Dominant microorganisms in the third soil layer were more, and the contents of available nitrogen and total sugar in this soil layer were the highest. The selected bacteria was dominated by cocci, the selected fungi was dominated by trichoderma.
出处
《安徽农业科学》
CAS
北大核心
2010年第1期19-20,55,共3页
Journal of Anhui Agricultural Sciences
关键词
秸秆
优势菌群
自然降解
Straw
Dominant microflora
Natural degradation
