| Spatial variability of soil electrical conductivity in Yantai orchard from April to November in 2005 was analyzed with the classical statistics and geo-statistics,and the Moran's I coefficient analysis and Kriging estimation were also processed.The results showed that soil electrical conductivity had obviously spatial variability,and semi-variance and Moran's I coefficient analysis accordantly illuminated that the spatial correlation range was large and the relativity was strong on 30 April,29 June and 16 November;while the spatial correlation range was small and the relativity was weak on 20 April,14 July and 16 August.The mean value and variation coefficient of soil electrical conductivity increased at first and then decreased as a whole;the electrical conductivity of surface soil at different periods was obviously different in spatial distribution,and the distribution fragmenting of soil electrical conductivity was very serious. |