Spatial Variability of Soil Phosphorus Based on Geostatistics

In this paper, the space variability of soil total phosphorus and available phosphorus at the depths of 0-12 cm ,12-20cm ,20-30cm in the Taihu Lake region of rice soil was examined by using traditional statistics with geostatistics methods. The results showed that: total phosphorus content was reduce while the depths increased, and available phosphorus content was first increased and then decreased with the depth increased. All three soil phosphorus coefficient of variation (57.53% -85.28%) far higher than the coefficient of variation available P (42.43% -64.42%), the semi-variable function of the variance variation C₀ / (C₀ + C) higher than 0.25, it indicate they have middle and weak correlation space and similar distance spatial structure .