Spatial response of water repellency to physicochemical properties in peach (Prunuspersica) orchard brown soil in Yimeng Mountains
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    Abstract:

    Peach (Prunuspersica) orchard is a type of land use typical of brown soil in the Yimeng mountains. Soil water repellency (SWR) and soil physicochemical properties, such as soil moisture, soil organic content and soil texture, in the peach orchard brown soil before and after rainfall were analyzed to explore spatial response of SWR of the soil to variation of its physicochemical properties. Soil moisture content and SWR was measured in-situ and a total of 100 topsoil samples were collected, too, in a 1 m×1 m grid pattern for analysis of contents of soil organic matter, sand, silt and clay. On such a basis, classic statistics, geostatistics and spatial correlation analysis were coducted. Results show that the SWR in studied brown soil was strong under the condition of lasting drought and decreased significantly after rainfall, and the SWRs before and after rainfall were both moderate in variability and strong in spatial autocorrelation, showing an exponential pattern in distribution with significant anisotropy. Under the joint function of structural and random variations, especially the structural variation, spatially the SWR was distributed in band following the direction of ploughing and its minimum codomain in vertical direction was 1.4 m. Soil texture was the main factor influencing spatial variability of SWR. SWR was positively related with silt content, but negatively with sand and clay contents in spatial distribution, showing an order of silt > sand > clay in degree of spatial correlation with SWR. SWR was also negatively related with soil moisture in spatial distribution. The negative relationship was quite weak before rainfall and became significant after rainfall.

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Sun Qiqi, Liu Qianjin, Yu Xingxiu, Li Jianhua, Zeng Zhaopeng. Spatial response of water repellency to physicochemical properties in peach (Prunuspersica) orchard brown soil in Yimeng Mountains[J]. Acta Pedologica Sinica,2014,51(3):648-655.

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History
  • Received:May 09,2013
  • Revised:December 23,2013
  • Adopted:December 26,2013
  • Online: February 27,2014
  • Published: