LAW OF TEMPORAL AND SPATIAL EVOLUTION OF PHYSICAL PROPERTIES OF SOIL RECLAIMED BY HYDRAULIC DREDGE PUMP IN MINING AREA
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    Abstract:

    This paper is to study the law of temporal and spatial evolution of the physical properties of soils reclaimed by hydraulic dredge pump in mining area. Taking Xuzhou mining area for example, soils of various times and depths of the reclaimed land by hydraulic dredge pump were studied. Results showed that in comparison with normal farmland soil, the soil texture tended to be clayey in the topsoil and sandy in the subsoil. The soil bulk density tended to be higher in the topsoil and lower in the subsoil. Meanwhile, the content of soil water-stable granular structure tended to be lower. As time went on, the reclaimed soil showed a decreasing trend in soil bulk density in the topsoil and an increaseing one in the subsoil whereas the content of water-stable granular structure increased. In the latter the 0.5-3 mm granular structure formed quicker. After 13 years of cultivation on the reclaimed land the soil bulk density and granular structure would have reached basically that of the normal farmland soil.

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Chen Long-qian, Deng Ka-zhong, Tang Hong, Liu Zheng-tian, De Jian-yuan, Li Yan-ming, Li Rong-lian. LAW OF TEMPORAL AND SPATIAL EVOLUTION OF PHYSICAL PROPERTIES OF SOIL RECLAIMED BY HYDRAULIC DREDGE PUMP IN MINING AREA[J]. Acta Pedologica Sinica,2001,38(2):277-283.

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History
  • Received:November 27,1999
  • Revised:December 17,2000
  • Adopted:
  • Online: February 25,2013
  • Published: