Spatial Variability of Soil Characteristics on Woodland and Infiltration Processes for Different Vegetation Types
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    Abstract:

    For the sustainable development and ecological construction in the Jinyun Mountain,it is important to describe the spatial variability of soil properties on slope woodland and infiltration processes for different vegetation types.Soil moisture,electrical conductivity and pH for 80 soil samples were measured,and the spatial variability was studied on the grids of 2m×2 m.Results showed that data of each variable fitted normal distribution,and there is a significant correlation between electrical conductivity and pH(α=0.01).The mean of CV% for each variable along the longitudinal slope was greater than that on the horizontal one.Soil moisture within different rows in both longitudinal and horizontal slope directions was not significantly influenced,whereas electrical conductivity and pH in the longitudinal slope direction were significantly influenced(α=0.01).The data were then analyzed using theory of geostatistics.It was found that soil moisture had a floating feature in both slope directions,and pH not only had the floating feature in the horizontal direction,but also showed the pure nugget effect in the longitudinal direction.Electrical conductivity showed a spatial structure in the horizontal direction,but did not have spatial relativity for the larger stochastic variability.The experiments on infiltration process in five standard lands demonstrated that steady-state infiltration rates in cultivated land and broad-leaved forest were 4.81 mm/min and 3.15 mm/min,respectively,and were 14 times and 9 times higher than that in coniferous-leaved forest,respectively.The amounts of 1h cumulated infiltration in cultivated land and broad-leaved forest were 1 365.58 mm and 518.46 mm,respectively,and were 37 times and 14 times higher than that in coniferous-leaved forest,respectively.

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王峰,石辉.林地土壤性质空间变异性与土壤入渗过程的研究[J].水土保持通报英文版,2007,(1):15-19

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History
  • Received:November 16,2005
  • Revised:September 07,2006
  • Adopted:
  • Online: November 26,2014
  • Published: