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本文采用分析对比法测定了土壤中好气性细菌、放线菌、霉菌以及土壤蓝藻的细胞量;还测定了包括好气性固氮菌、纤维素分解菌、硝化细菌和氨化细菌四类群具有生理活性的微生物。同时,对土壤的主要农化性状进行了分析。试验表明,土壤肥力状况同微生物数量呈正相关。土壤肥力差异是灌漠土>黑垆土>黄绵土。亚高山草甸土虽然含有机质较多,微生物总量却较小。各类土中的微生物总数多达一亿个/克干土以上。其中细菌约占95%,放线菌占4%,霉菌和蓝藻较少。灌漠土和黑垆土含有较多的好气性固氮菌、纤维素分解菌,表明了该类土壤具有良好的肥力性状和熟化程度较高。
In this paper, the amount of aerobic bacteria, actinomycetes, molds and soil cyanobacteria in soil were determined by the method of analysis and comparison. The four groups including Aerobic Azotobacter, Cellulolytic Bacteria, Nitrifying Bacteria and Ammonia Bacteria were also assayed for their physiological activities Of microorganisms. At the same time, the main agronomic characters of soil were analyzed. Tests showed that soil fertility status and the number of microorganisms was positively correlated. The difference of soil fertility is irrigated desert soil> black soil soil> loess soil. Although sub-alpine meadow soil contains more organic matter, the total amount of microorganisms is smaller. All kinds of soil in the total number of microbes up to 100 million / g dry soil above. About 95% of which bacteria, actinomycetes accounted for 4%, less mold and cyanobacteria. Irrigated desert soil and black sand soil contain more aerobic azotobacter, cellulose decomposing bacteria, indicating that the soil has good fertility traits and a higher degree of maturation.