第六次全国荒漠化和沙化调查以第三次全国国土调查成果为底板,以2019年为基准年,全面查清了我国荒漠化和沙化的状况。通过简要介绍第六次全国荒漠化和沙化调查的基本情况,全国荒漠化和沙化土地状况和动态变化,结合相关资料分析了目前的防治形势并提出了对策建议。调查结果显示,截至2019年,我国荒漠化土地面积为25 737.13万hm²,沙化土地面积为16 878.23万hm²。与2014年相比,5年间全国荒漠化土地面积净减少378.80万hm²,年均减少75.76万hm²。沙化土地面积净减少333.52万hm²,年均减少66.70万hm²。

The Sixth National Survey on Desertification and Sandification was based on the results of the Third National Land Survey,using 2019 as the benchmark year.The results showed a comprehensive status of desertification and sandification in China.This paper presented a brief overview of this survey,the status and dynamic changes of desertification and sandification in China,conducted a comprehensive analysis of the current situation,and proposed some suggestions for combating desertification and sandification.The survey results showed that,until 2019,the desertification land area in China was 257.371 3 million hm² and the sandification land area was 168.782 3 million hm².Compared with 2014,the desertification area of China decreased by 3.788 0 million hm² with an average annual decrease of 757.6 thousand hm².The sandification area of China decreased by 3.335 2 million hm² with an average annual net reduction of 667 thousand hm².