保护地不同灌溉方法表层土壤pH小尺度的空间变异

Micro-Scale Spatial Variability of Surface Soil pH Under Different Irrigation Methods in Greenhouse

基于保护地定位灌溉试验，采用经典统计学和地统计学的方法，以网格取样方式采集不同灌溉方法（沟灌、滴灌、渗灌）表层土壤，研究微尺度下土壤pH值的空间变异特征及空间分布。结果表明；经6年灌溉，沟灌处理pH显著降低，沟灌和滴灌0～5cm土层土壤pH表现为中等空间自相关，而其5～10cm和渗灌0～5cm和5～10cm的土壤pH表现为弱空间相关，水分的供给方式和数量影响土壤pH的空间变异。

Based on 6-years irrigation experiment in greenhouse, micro-scale spatial variability and the distribution of surface soil pH were analyzed by combining classical statistic method with geostatistic method with a small grid-sampling technique under three irrigation methods （furrow irrigation, drip irrigation and subsurface irrigation）. The results indicated that, after 6-years irrigation, soil pH under furrow irrigation decreased significantly, soil pH （0 - 5 cm） under furrow irrigation and drip irrigation were medium heterogeneity, and soil pH （5 - 10 cm） of furrow irrigation and drip irrigation, soil pH （0 - 5, 5 - 10 cm） of subsurface irrigation which were weak heterogeneity. The supplying way and quantity of water by irrigation can affect the spatial variability of soil pH.