Spatial variability of soil water repellency and soil physical-chemical properties in saline-alkaline field
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    Abstract:

    Based on the measurement of two hundred and eighty four soil samples taken in grid patterns of three different scales (with intervals of 50 m, 5 m and 0.5 m separately between sampling points) in a saline-alkaline field in Manasi County, Xinjiang, spatial patterns of soil water repellency and soil physical-chemical properties were analyzed by means of classical statistics, spatial autocorrelation theory, geostatistics and fractal theory. Results indicate that 1)both soil water repellency and pH followed a normal distribution while the other soil properties a lognormal distribution, and most of the soil properties studied varied to a moderate degree regardless of scales; 2)Moran’s I coefficients of all the soil properties were quite similar in variation, which ranged from -0.8 to 0.6 at all the three scales; 3)most semi-variance theoretical models of the soil properties could be fit with spherical models at all the three scales; and 4)within a certain range, the soil properties showed fractal features, and their fractal dimensions varied in the range from 1.75 to 1.96. The findings indicate that soil water repellency and soil physical-chemical properties are somewhat different in spatial distribution at different scales.

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guolijun, Li Yi. Spatial variability of soil water repellency and soil physical-chemical properties in saline-alkaline field[J]. Acta Pedologica Sinica,2011,48(2):275-285.

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History
  • Received:March 03,2010
  • Revised:July 10,2010
  • Adopted:August 24,2010
  • Online: August 31,2010
  • Published: