贵州喀斯特地区土壤障碍因素分析及其调控对策

Soil Restrictive Factors Analysis and Countermeasures in Guizhou Karst Region

喀斯特环境是一种脆弱性很强的生态环境,在贵州集中连片分布,碳酸盐类岩石出露达13×104km2,占全省土地总面积的73.6%,是我国喀斯特地貌最发育的省份。论述了喀斯特生态环境的脆弱性及其土壤障碍因素,提出大量施用有机肥,合理施用石灰,调整种植结构,扩种绿肥和防治水土流失是喀斯特地区土壤培肥的主要措施,对西部大开发与退耕还林还草的实施有一定指导意义。

Karst is one of the weakest kind of ecological environments and one of the main factors that restrict economic development in south - west China, especially in Guizhou province. Karst accounts for 73. 6% of total land area. Although many researches on karst environment have been done, there is little study on the soil quality. Therefore, this paper first expounds the basic features of karst eco - environmental fragilities in Guizhou, its causes and mechanism of soil restrictive factors, then puts forward the main countermeasures, which should be the application of efficient lime, adjusting plant structure, planting green manure and the control of soil and water losses. There are important meanings for the west development and de - farming and reafforestation in Karst region according to the requirements of eco - environment construction in western China.