不同种植方式下低山丘陵区茶园土壤有机质空间变异研究

Spatial Variability of Organic Matter in Tea Plantation Soil at Different Planting Patterns in Low Mountain and Hill Region

运用地统计学方法与GIS相结合,对坡面不同种植方式(横坡、顺坡)下低山丘陵茶园土壤有机质的空间变异进行了研究。结果表明:横坡种植与顺坡种植方式下土壤有机质含量都具有中等程度变异,变异系数分别为34.05%和20.59%。横坡、顺坡两种种植方式下土壤有机质含量具有强烈的空间相关性,C0/(C0+C)值分别为20.9%和24.8%;在横坡种植方式下有机质含量空间相关距离为42m,而在顺坡种植方式下空间相关距离为17m。横坡种植方式下土壤有机质在东西方向上表现出各向异性,与地形表现出很好的一致性;在顺坡种植方式下土壤有机质在东西、南北方向上都有明显的趋势特征,表现出各向异性。

Statistical methods and GIS technology were used for the analysis of the spatial variability, to reveal the spatial variability of soil organic matter at different planting patterns. The results indicated： （1） The coefficient of variation under transverse soil had a moderate variation, and also in the vertical soil. The coefficients of variation were 34.05% and 20.59%. （2）The soil organic matter had a strong spatial correlation under transverse and vertical soil, and the rates of nugget to sill were 20.9% and 24.8%. And the range of spatially dependent was 42m at transverse soil, but at vertical soil the range of spatially dependent was 17m. （3） The spatial variability of soil organic matter trends to isotropy in east- west direction under transverse soil, and showed the trend as same as topography. But under transverse cultivation, the content of soil organic matter showed trend analysis in east- west and north- south direction.