滇东南石漠化山地不同退耕还林模式土壤地力变化初探

Preliminary Study on Land Capacity Change of Different Returning Cultivated Land to Forest, Model Soils at Karst Mountains Desertification Area in Southeastern Yunnan

通过对滇东南西畴县石漠化山地12种不同退耕还林模式的土壤进行定点观测和地力变化的分析,初步结果表明：土壤物理性状有很大改善,土壤抗蚀性和储水性增强,土壤养分提高,土壤吸收保存养分离子能力增强。对于提高地力而言,墨西哥柏＋金银花、花椒＋白枪杆、川滇桤木＋红三叶、川滇桤木林、花椒＋大白脉根和墨西哥柏＋紫花苜蓿等6种模式较佳,值得在石漠化山地推广。

A preliminary study on the land capacity change of twelve returning cultivated land to forest models in Xichong county of southeastern Yunnan was conducted by ocean weather station observation. The premilinary results showed that the soil physical property has been greatly improved, the nutrition, corrosion stability and storing water capacity of soil are maken better, which resulted by returning cultivated land to forest for many years. In term of land capacity improvement, Cupressus lusitanica ＋ Lonicera japonica, Zauthox ylum bung eanum ＋ Fraxinus malacoph ylla , Alnus f erdinandi- coburgii ＋ Alnus f erdinandi - coburgii , Alnus f erdinandi - coburgii , Zauthox ylum bungeanum ＋ Lotus uli ginosus ev. Crasslands and Cu pressus lusitanica ＋ Medicago sativa are better models,which are worth popularizing in katst mountains desertification area.