西南岩溶石山地区土地资源脆弱性研究意义及应用前景

碳酸盐岩出露造成的成土慢、土层薄、土被不连续、土壤贫瘠等，使土地资源存在本质的脆弱性；在人类胁迫下，土地资源极易蜕变，如土地资源损毁、土地退化、土壤污染等，存在特殊的脆弱性。土地资源脆弱性使得土地资源易产生水土流失、石漠化等生态环境问题，承受自然灾害能力低，使岩溶山区的社会经济发展和生态环境的协调性差，可持续发展能力弱。因此，开展岩溶石山地区土地资源脆弱性研究。对岩溶石山地区水土资源的可持续利用、岩溶水土流失防治、石漠化形成演化与治理、岩溶生态环境整治与重建均有着重要科学意义与广泛应用前景。

Study Meaning and Application Potential of the Vulnerability of Land Resources in Karst Stone Mountainous Areas in Southwest China

Karst mountainous areas in Southwest China possess a typical characteristics of vulnerable entironment, such factors as lower velocity of soil engendering, thin soil layer, and its discontinuity, leanness caused by outcrop carbonate stone directly result in intrinsic vulnerability of which, moreover, destroying, degradation and contamination of land or soil by artificial reasons create the special vulnerability.Vulnerability of land resources makes soil erosion and rocky desertification happen easily, and diffcult to resist natural calamities, harmony between social economy and entironment becomes weak accordingly.Influencing ingredients and mechanisms of the vulnerability of land resources can be analyzed from geology, hydrogeology, soil and entironment throgh investigation on actuality and entironment in karst stone mountainous areas, index system and criterion of grade evaluation in the areas should be founded on the base of which to perform impersonal evaluation and environmental effects of land resources vulnerability, which can supply scientific foundation for decision-making in soil management, soil restoration, applicability evaluation, and have significance in sustainable use of land, and prevention and cure of soil erosion and karst rocky desertification, and renovation and reconstruct of karst entironment