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| Effects of different reclamation patterns on the stability of soil water-stable aggregates of an opencast mine in Loess area |
| Received:November 22, 2016 |
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| KeyWord:reclaimed land;different reclamation patterns;vegetation restoration;soil water-stable aggregates;stability index |
| Author Name | Affiliation | E-mail | | WANG Yang-yang | College of Land Science and Technology, China University of Geosciences(Beijing), Beijing 100083, China | | | ZHAO Zhong-qiu | College of Land Science and Technology, China University of Geosciences(Beijing), Beijing 100083, China
Key Laboratory of Land Consolidation and Rehabilitation Ministry of Land and Resources, Beijing 100035, China | zhongqiuzhao@163.com | | YUAN Ye | College of Land Science and Technology, China University of Geosciences(Beijing), Beijing 100083, China | | | CHEN Lu-ming | College of Land Science and Technology, China University of Geosciences(Beijing), Beijing 100083, China | | | GUO An-ning | College of Land Science and Technology, China University of Geosciences(Beijing), Beijing 100083, China | |
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| Abstract: |
| To understand the effects of different reclamation patterns on the stability of soil water-stable aggregates, reclaimed dumps of the Antaibao opencast mine in Shuozhou, Shanxi Province, which is located in the northwest Loess Plateau of China, were chosen for this case study. Soils were sampled in four mixed forest reclamation patterns (Robinia pseudoacacia L. + Pinus tabulaeformis C., Robinia pseudoacacia L. + Ulmus pumila L. + Ailanthus altissima M., Robinia pseudoacacia L. + Caragana korshinskii K. + Hippophae rhamnoides L., Hippophae rhamnoides L. + Ulmus pumila L.) ;two types of pure forest reclamation patterns (Robinia pseudoacacia L. forest and Robinia pseudoacacia L. forest) ;the arable land. The original landform and un-reclaimed land were taken as control. The content of water-stable macro-aggregates, soil water-stable aggregates stability rate (WSAR), geometric mean diameter (GMD), mean weight diameter (MWD), and failure rate (PAD) were analyzed. The results showed that, after years of reclamation, the stability of soil water-stable aggregates has significantly improved.The values of DR0.25, WSAR, MWD, and GMD of aggregates ranked as：four mixed forest reclamation patterns>two pure forest reclamation patterns > un-reclaimed land, forest land > arable land.The PAD values of soil water stable aggregates showed the opposite order. The stability of soil water-stable aggregates was the best under the Robinia pseudoacacia L.+ Pinus tabulaeformis C. pattern. There was a significant positive correlation among DR0.25, WSAR, MWD, and GMD in the evaluation indices of the soil water-stable aggregates, and they all had extremely significant negative correlation with PAD. These results can provide some basis for land reclamation and soil remodeling of opencast mines in Loess areas. |
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