Spatial Variability of Soil Nutrient Content in Phyllostachys edulis Stands in Songyang County

In December 2014 and January 2015, soil samples were collected at Phyllostachys edulis stands in 18 villages of Songyang county, Zhejiang province. Determinations were conducted on soil pH, content of organic matter, total nitrogen, available nitrogen, total potassium, available potassium, total phosphorus and available phosphorus. The result demonstrated that mean pH was 4.75±0.28, average organic matter content of 42.94±10.47 g/kg, average total nitrogen content of 2.15±0.96 g/kg, average available nitrogen content of 159.79±70.49 mg/kg. The average total phosphorus content, available phosphorus content, total potassium and available potassium content was 0.19±0.09 g/kg, 2.27±1.45 mg/kg, 10.01±2.95 g/kg, 2.27±1.45 g/kg, 61.28±26.6 mg/kg respectively. Statistical analysis showed that there were significant variations among soil nutrient contents. Analysis by semi-variogam resulted that distribution of total N and available P was in accordance with spherical model, that of organic matter, total P and total K with Gaussian model, and that of available N and available K with exponential model. The nuggest coefficient of each nutrient was 25%-75%, meaning a medium spatial autocorrelation. Based on analysis of comprehensive factors such as bamboo management, it concluded that the spatial variation of main nutrients in the soil of bamboo stands in Songyang was the result of interaction of natural process and management activities.