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对云南东南部的文山岩溶地区土壤资源利用现状及其土壤特性,以及土壤利用方式改变对生物多样性和生态环境造成的影响进行了分析研究,结果表明:植被覆盖较好的土壤呈垂直规律分布,土层深厚,阔叶林下A层平均厚度17cm。土体为A-B-C-D完整构型,土壤发育良好。<0.001mm的粘粒10～60%。土壤C/N平均比值阔叶林下19 17,针叶林和针阔混交林下10.4。阔叶林土壤有机质平均含量115.7gkg-1,为亚热带肥力较高的土壤,但植被类型改变为针阔混交林则降为77.4gkg-1,改变为针叶林降至55.9gkg-1,改变为坡耕地则降至14.9gkg-1,反映了岩溶地区人为活动影响下的土壤退化趋势。
The current situation of the utilization of soil resources and their soil characteristics in Wenshan karst area in southeastern Yunnan and the impact of changes in soil use patterns on biodiversity and ecological environment were analyzed. The results showed that the soil with better vegetation coverage showed a vertically regular distribution , Deep soil, A layer of broad-leaved forest under the average thickness of 17cm. Soil A-B-C-D complete configuration, soil development is good. <0.001mm cosmids 10 to 60%. The average soil C / N ratio was 19 17 in broadleaf forest, 10.4 in coniferous forest and mixed coniferous and broadleaf forest. The average content of soil organic matter in broad-leaved forest was 115.7gkg-1, which was the soil with high fertility in subtropical zone. However, the change of vegetation type to coniferous-broad-leaved mixed forest was 77.4gkg-1 and that of coniferous forest decreased to 55.9gkg-1 For sloping arable land dropped to 14.9gkg-1, reflecting the karst area under the influence of human activities of soil degradation.