北江流域森林土壤磷空间分布特征研究

Spatial Distribution Characteristics of Phosphorus in Forest Soil in Beijiang River Basin

研究基于实地采样的结果,对北江流域森林中174个样本点进行土壤化验,并利用空间插值进行空间分析,结果显示,各土壤层含磷量存在差异,表层土壤磷含量的平均水平显著高于其他土壤层,且随土壤深度增加,含磷量逐渐降低。同时,4个土壤层磷含量均存在相似的态势。4个土壤磷含量呈现西北-东南方向含量较高,西南-东北方向含量较低,中部磷含量较多,外部磷含量下降,总体呈现西北-东南对称分布的空间分布。

In this study,based on the results of field sampling of 174 sample points in the beijiang river forest soil assays,and use the spatial interpolation in spatial analysis,the results showed that the phosphorus content of each soil layer was different,and the average level of phosphorus content of surface soil was slightly higher than that of other soil layers,and with the increase of soil depth,the phosphorus content gradually decreased,the degree of dispersion decreased,and the spatial variability gradually weakened.The phosphorus content of the four soils was higher in the northwest to southeast direction,and lower in the southwest to northeast direction.The phosphorus content of the four soils was higher in the central direction,and the phosphorus content of the four soils was significantly decreased in the outer direction,and the overall spatial distribution was symmetrical from northwest to southeast.