云南省岩溶地区石漠化土地动态变化研究

Dynamic Change of Rocky Desertification Land in Karst Area of Yunnan Province

将云南省岩溶地区第四次石漠化监测成果与第一次监测进行对比分析研究。结果表明,2006—2021年16年间,云南省石漠化土地面积减少116.86万hm^(2),减少40.56%,年均减少7.30万hm^(2),年均减少率为2.53%;云南省石漠化土地面积呈下降趋势,石漠化程度减轻趋势明显。国家和地方实施的石漠化综合治理工程、森林抚育工程、长江珠江防护林工程、生态公益林建设、退耕还林(草)工程等生态修复类工程在石漠化土地面积及程度变化中起到主要作用。

The results of the fourth rocky desertification monitoring in karst areas of Yunnan Province were compared and analyze with the first monitoring.The results showed that from 2006 to 2021,the area of rocky desertification in Yunnan Province decreased by 1.1686 million hm^(2),a decrease of 40.56%,with an average annual decrease of 73000 hm^(2) and an average annual decrease rate of 2.53%;the land area of rocky desertification showed a downward trend,and the degree of rocky desertification decreased obviously.The state and local governments have implemented forest and grass management and protection projects,and ecological restoration projects such as the comprehensive control project on rocky desertification,the forest tending project,the shelterbelt project along the Yangtze River and Pearl River,the construction of ecological public forest,and the project of returning farmland to forest(grassland)have played a leading role in the change of the area and degree of rocky desertification land.