期刊
AEOLIAN RESEARCH
卷 50, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.aeolia.2020.100646
关键词
Soil texture; Cultivation effect; Oasis expansion; Cultivation years; Particle size distribution; Wind erosion
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA20030102]
- National Natural Science Foundation of China [41971017]
- National Thousand Talents Program, China [Y772091001]
- Chinainitiated the Belt and Road Special Project [131965KYSB20170038]
A field survey and remote sensing monitoring were conducted to explore the effects of oasis expansion on soil texture in arid desert regions in Xinjiang, Northwest China. Results showed that clay and silt content increased while sand content decreased in cultivated lands with cultivation years. However, in some plots, clay and silt content in croplands were lower than in adjacent uncultivated lands.
To explore the cultivation effects on soil texture at local and regional scales during the expansion of oases, a field survey combined with remote sensing monitoring was conducted in the arid desert regions in Xinjiang, Northwest China. We evaluated possible changes by comparing cultivated and uncultivated lands in 2019 with paired reference lands from the Second National Soil Survey of China. The results showed that the clay content and the silt content in cultivated land increased with cultivation years (p < 0.05), while the sand content decreased. A comparison of the clay plus silt content between 2019 and the late 1970s revealed the accumulation of fine particles in the center of oases and the removal of fine particles at their edges. Our results also demonstrate that sand content increased in the newly reclaimed land, the uncultivated land at the edge of the oases, and the sandy land. A comparison of 15 paired reference samples indicated that in most plots, clay content and silt content in croplands are higher than in adjacent uncultivated lands, although some plots showed a decreasing trend, implying that agricultural cultivation dose not always increase fine particles. We conclude that the initial difference in soil texture before reclamation and reclamation history jointly result in differences in soil texture between cultivated and adjacent uncultivated lands. During oasis expansion, the reclamation of the sandy land can reduce wind erosion, suggesting that appropriate agricultural reclamation and conservation measures can mitigate the adverse effects of changes in soil texture.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据