喀斯特石漠化地区人工生态经济林土壤营养特性典型研究

人工营造大面积的生态经济林是喀斯特石漠化防治的重要措施,生态经济林的可持续经营直接关系到石漠化治理工程的成败。本文关注土壤营养特性对生态经济林经营的影响,以贵州典型喀斯特石漠化地区花江峡谷成功经营的顶坛花椒林为例,分析了喀斯特石漠化地区造林前为荒地和耕地的种地类上人工生态经济林林下土壤的营养背景,各主要大量营养元素和微量营养元素种类的全量和有效态含量及其垂直变化特性,并重点探讨了未受到应有重视的喀斯特石漠化地区石灰土金属微量元素有效性低下问题及其机理。本文为喀斯特石漠化地区生态经林造林树种遴选及后期管护和施肥决策,尤其是微量元素的合理施用提供依据。

A Typical Research on Soil Nutrition Peculiarity of Artificial Ecological Economic Forest in Karst Desertification Area

Widespread artificial forestation for ecological economic forest is an important measure of Karst Desertification control. Ecological economic forest sustainable management is directly related to success or failure of desertification control. This article focuses on the influence of soil nutrient peculiarity of ecological economic forest management. Base on the successful operation case of Zanthoxylump lanispinum var. dintanensis forest in Huajiang canyon,a typical karst desertification area of Guizhou,the paper analyses soils including wasteland,two types of farming land,nutrient background under the ecological economic forest on Karst desertification area,and the amount and effective content of several kinds of main nutrient and micronutrient elements,and their vertical change. The paper focuses on the problem and mechanism of low efficient metal trace elements in lime soil. This paper provides basis for selecting tree species of ecological economic forest,management and fertilizer,especially reasonable application to trace elements on the Karst desertification area.