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Effects of land use type on soil nutrient distribution in northern agro-pasture ecotone

Liu, Q.; Tong, Y.

Ying Yong Sheng Tai Xue Bao 16(10): 1849-1852

2005

ISSN/ISBN: 1001-9332
PMID: 16422501
Document Number: 585108
Soil samples under five land use types were collected from Duolun County in the northern agro-pasture ecotone. Chemical analysis showed that soil nutrient content was the lowest in farmland, medium in grassland, and the highest in woodland, indicating that reclamation accelerated the decomposition of soil organic matter and the further loss of soil nutrients. To investigate the effects of land use type on soil organic matter, available phosphors, available nitrogen and total nitrogen, soils from four different land use types in the catchments with slopes steeper than 15 degrees were sampled and analyzed. Vertically, the content of soil nutrients from slope bottom to its top was two times higher in land use type cropland-grassland-woodland than in grassland-woodland-cropland. Such a difference indicated the positive effects of the former land use type on soil nutrient retention. Therefore, selecting this optimal land use type in studied area could improve local eco-environment and economic benefits.

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