荒漠化监测样地不同立地类型土壤有机质测定分析

Determination and Analysis of Soil Organic Matter in Different Site Types of Desertification Monitoring Plots

为了解榆林荒漠化监测样地不同立地类型土壤有机质含量,对不同立地类型样地的土壤有机质含量进行了测定分析。结果表明:不同立地类型土壤平均有机质含量(土壤表皮层0 cm)为固定沙地>沙化草地>半固定沙地;所测土壤样品中,土壤平均有机质含量在垂直分布上,随着土层深度的增加,有机质含量减少;不同立地类型地表植被种类和土壤有机质含量有着直接密切的关系。在生态建设中建议乔灌草混合种植,以达到更好地改善生态环境的目的。

In this study,the content of soil organic matter of different site types plots was determined and analyzed to understand the content of soil organic matter in different site types of Yulin desertification monitoring plots.The results showed as follows:the average soil organic matter content(soil epidermis layer 0 cm)of different site types was fixed sandy land>desertified grassland>semi-fixed sandy land;in the measured soil samples,the average soil organic matter was distributed vertically,and the organic matter content decreased with the increase of soil depth.There is a direct and close relationship between the types of surface vegetation and soil organic matter content of different site types,and it is recommended to mix shrubs and grasses in future ecological construction to achieve the purpose of better improving the ecological environment.