石漠化土地利用成因分类

The land use genesis classification of karst rockification

基于黄平县2004年的石漠化和土地利用数据，定量研究黄平县各区不同等级石漠化土地中土地利用类型的分布规律和不同土地利用类型的石漠化发生率。结果表明：不同等级石漠化与不同土地利用类型存在着相关性，石漠化土地中以灌木林地、低覆盖度草地、未利用地、山区旱地、石质旱地等土地利用类型占较大比例；轻度石漠化土地中以稀疏草坡和中密度草坡为主，中度石漠化土地以未利用地和低、中覆盖度草坡和石质旱地为主，强度石漠化土地以石质旱地和未利用地为主，但这种空间关联因区域而异。进而对轻度、中度和强度石漠化作出了按发生的土地利用类型的分类，因此，黄平县及其Ⅰ～Ⅴ区轻度、中度和强度石漠化的恢复治理也应以相应的土地利用类型为重点。

Based on land rockification and land use datum in 2004, the land use types distribution law in different grade rockification and occurrence ratio of rockification in different land use types in Huangping county were researched quantitatively. Results indicated that there is a relativity among different grade rockification and land use types, the shrub-land, sparse coverage grass slopes, unused land, slope cropland and rocky dryland have a higher occurrence ratio of karst rockification. Slight rockification was dominated by sparse and moderate coverage grass slopes, moderate rockification was dominated by unused land, moderate coverage grass slopes and rocky dry-land, intense rockification was dominates by rocky dry-land and unused land. But these spatial correlations among land use patterns and different grade rockification varied with districts. Furthermore, the slight, moderate and intense rockification are classified as land use types, so the restoration and reconstruction of slight, moderate and intense rockification land should be emphasised corresponding land use patterns in Huangping County and its Ⅰ～Ⅴ subarea.