佳木斯市郊区不同土地利用方式下土壤微生物多样性

Microbial Diversity of Soil under Different Land Use Patterns in Jiamusi Suburb

[目的]测定不同土地利用方式下微生物的多样性及与p H、有机质含量、含水量、总磷含量的关系,探究佳木斯市郊区不同土地利用方式对土壤微生物的影响.[方法]通过稀释涂布平板法测定微生物数量,重铬酸钾氧化法测定有机质含量,硫酸-过氧化氢消煮紫外分光光度法测定总磷含量.[结果]菜地微生物总数、有机质含量、总磷含量、p H及含水量均高于田地.[结论]不同土地利用方式对微生物多样性的影响不同,减少化肥的使用,增施有机肥是实现土地资源可持续利用的重要途径.

[ Objective] The effects of different land use patterns on soil microbes were studied by measuring the diversity of microbes, and re-lationship between pH value, organic matter content, water content and total phosphorus and them in different land use patterns. [ Method] The amount of microorganisms was determined by dilution coating plate method, the content of organic matter was determined by potassium di-chromate oxidation method, and the total phosphorus content was measured by sulfuric acid-hydrogen peroxide digestion ultraviolet spectropho-tometry. [Results] Total number of microorganisms, organic matter content, total phosphorus content, pH and water content in vegetable land were higher than that of farmland. [ Conclusion] The effects of different land use patterns on microbial diversity were different, so reducing the use of fertilizer and increasing organic fertilizer was an important way to realize the sustainable utilization of land resources.