Characteristics of changes in soil components and trace element contents during the reversal of desertification in Mu Us Sandy Land
By constructing the DDI of desertification index in Mu Us Sandy Land in 2021 by remote sensing in-terpretation,and classifying the land in Mu Us Sandy Land into five desertification types according to the natural fracture method,namely non-,light,moderate,heavy and very heavy desertification,representing different stages of desertification reversal,and applying the spatial instead of temporal method to collect samples and con-duct laboratory analysis on different desertification types of soils according to the inversion results.In order to re-veal the process of reversal of desertification in Mu Us Sandy Land and its effects on soil components and effec-tive state Cu,Fe,Mn and Zn contents.The results show that the desertification of the Mu Us Sandy Land revers-es from 1986 to 2021,and the desertified land area shrinks from 47 877.81 km2 in 1986 to 45 914.06 km2 in 2021,with a reversal rate of 56.11 km2 per year,and the implementation of a series of projects is effective in re-building the ecosystem of the Mu Us Sandy Land;as the desertification decreases,the soil particle size fraction the process of reversal of desertification is essentially the process of soil fine-grained and enrichment of trace ele-ments;due to the unevenness of the implemented projects,the degree of reversal of Mu Us Sandy Land has been different since 1980,and the representative areas with significant reversal of desertification are Zhaoshao Town-ship in Ertok Banner,Garutu Sumu in Uttarakhand Banner,and Taig Sumu in Ijinholo Banner,whose soil clay particles,powder particles and effective Cu,Mn and Zn increased significantly,and the content of soil sand grain and effective Fe decreased significantly.Obviously,the reversal process of desertification in the Mu Us Sandy Land has resulted in a finer soil structure and a significant improvement in soil quality.
desertification reversalsoil fractiontrace elementsMu Us Sandy Land
NETL
NSTL
万方数据
维普
