Changes in wind erosion over a 25-year restoration chronosequence on the south edge of the Tengger Desert, China: implications for preventing desertification
Changes in wind erosion over a 25-year restoration chronosequence on the south edge of the Tengger Desert, China: implications for preventing desertification
复制标题
中国腾格里沙漠南缘风蚀25年恢复时序变化：对防治荒漠化的启示
DOI：
10.1007/s10661-017-6183-0
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发表时间：
2017-08
影响因子：
3
通讯作者：
Fang Chen
中科院分区：
文献类型：
--
作者：
Quanlin Ma;Jeffrey S.Fehmi;Dekui Zhang;Baoli Fan;Fang Chen
Wind erosion is a primary cause of desertification as well as being a serious ecological problem in arid and semi-arid areas across the world. To determine mechanisms for restoring desertified lands, an unrestored shifting sand dune and three formerly shifting sand dunes (desertified lands) that had been enclosed and afforested for 5, 15, and 25 years were selected for evaluation on the south edge of the Tengger Desert, China. Based on sampling heights between 0.2 and 3 m, the critical threshold average wind speed was 6.5 m s−1at 2 m where the sand transport rate was reduced from 285.9 kg m−2h−1on the unrestored dunes to 9.1 and 1.8 kg m−2h−1on the sites afforested and enclosed for 5 and 15 years, respectively. The percentage of wind eroded area was reduced from 99.9% on the unrestored dune to 94.5, 9.0, and 0.5% on the sites afforested and enclosed for 5, 15, and 25 years, respectively. Wind erosion was effectively reduced after 15 years. Although there were different driving factors for wind erosion mitigation on the different restoration stages, an increase in the vegetation cover, surface roughness, soil shear strength, soil clay content, organic matter, and reduction in the near-surface wind speed were the primary variables associated with the restoration chronosequence. We conclude that reducing the wind speed and developing a biological crust through vegetation restoration were the critical components for restoration of desertified land.
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DOI：
--
发表时间：
2008
期刊：
Journal of Anhui Agricultural Sciences
影响因子：
--
作者：
Zhao Pei-yi
通讯作者：
Zhao Pei-yi
DOI：
--
发表时间：
2008
期刊：
Research of Soil and Water Conservation
影响因子：
--
作者：
Mao Shi-long
通讯作者：
Mao Shi-long
影响因子：
3.2
作者：
R. Lorenz
通讯作者：
R. Lorenz
影响因子：
6.2
作者：
J. Rajot;S. Alfaro;L. Gomes;A. Gaudichet
通讯作者：
J. Rajot;S. Alfaro;L. Gomes;A. Gaudichet
影响因子：
--
作者：
T. Edition;R. P. C. Morgan;Msepr
通讯作者：
T. Edition;R. P. C. Morgan;Msepr