[Spatial variability of soil total K and available N in Shenyang urban area].
Geostatistics combined with geographical information system (GIS) was applied to analyze the spatial variability of soil total K and available N in urban area of Shenyang City. The results showed that the theoretical semivariogram models of soil total K was best described by an exponential model, while soil available N was best fitted by a Gaussian model. The ratios of nugget to sill of soil total K and available N were 10.65% and 17.96%, respectively, indicating that there existed significant spatial correlations between soil total K and available N, and the spatial variability was mainly caused by structural factors. The spatial distributions of soil total K and available N in urban area of Shenyang were analyzed by kriging interpolation, and it was found that the content of soil total K had no definite spatial distribution pattern, while the content of soil available N was higher in the around and lower in the middle of the city.
Zhang
Hong-Wei
HW
College of Land and Environment, Shenyang Agricultural University, Shenyang 110161, China. zhw666happy@126.com
Wei
Zhong-Yi
ZY
Wang
Qiu-Bing
QB
D002681:China; D002947:Cities; D004784:Environmental Monitoring; D040362:Geographic Information Systems; D008962:Models, Theoretical; D009584:Nitrogen / Q000032:analysis*; D011188:Potassium / Q000032:analysis*; D012987:Soil / Q000032:analysis*
D012987:Soil; D009584:Nitrogen; D011188:Potassium