The Spatio-Temporal Variability of Available P and Total K in Cultivated Soil of Xinhui District in Guangdong Province

Geostatistical methods were used in combination of GIS to analyze the spatial distribution char- acteristics of total K and available P in cultivated soils in Xinhui district, Guangdong Province, over 20 years from 1982 to 2003. The results showed that the content of total K and available P significantly increased with the cultivation and fertilizer application in the past 20 years; the content of total K in the south significantly increased; the total K and available P in cultivated soils had moderate spatial relativity ; the range of the total K and available P had relationships with the chemical action of soil nutrients.