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Proceedings Paper

Study on the spatial distribution of the content of potassium in the upper stream of the Hunhe River basin, northeastern China
Author(s): Ruichao Guo; Xianfeng Shi; Xingyuan He; Wei Chen; Xiaoyu Li; Weihang Ding
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Paper Abstract

Continuous soil nutrient data is the basic data of soil information system, soil nutrient spatial interpolation study becomes very important because it can affect the data reliability of soil nutrient data straightly. Kriging was used for analysing the spatial variability of soil K content in the upper stream of the Hunhe River basin, Liaoning Province which covers 53% of the total area of Qingyuan County, by employing geostatistical methods and GIS technique. The topsoil samples were collected at 217 locations in cropland or forest land. The results show that soil total K and available K are strongly spatially dependent, followed a normal distribution, with an arithmetic mean of 1.83%, 88.00 mg/kg and median of 1.82%, 79.52 mg/kg. Semivariograms showes that both the soil total K and available contents had strong spatial dependency, which might be attributed to intrinsic and extrinsic factors. The soil available K contents were the highest in secondary forest soils and lowest in non-irrigated farmland soils. The experimental variogram of soil K content has been fitted with an exponential model. Map of the soil K content was generated through interpolation of measured values by ordinary kriging.

Paper Details

Date Published: 5 February 2011
PDF: 8 pages
Proc. SPIE 7752, PIAGENG 2010: Photonics and Imaging for Agricultural Engineering, 77520L (5 February 2011); doi: 10.1117/12.887701
Show Author Affiliations
Ruichao Guo, Institute of Applied Ecology (China)
Graduate Univ. of the Chinese Academy of Sciences (China)
Xianfeng Shi, Qingyuan Manchu Autonomous County Watercourse Administrative Office (China)
Xingyuan He, Institute of Applied Ecology (China)
Wei Chen, Institute of Applied Ecology (China)
Xiaoyu Li, Institute of Applied Ecology (China)
Weihang Ding, Institute of Applied Ecology (China)
Graduate Univ. of the Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 7752:
PIAGENG 2010: Photonics and Imaging for Agricultural Engineering

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