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土壤中磷素的含量对土壤肥力和茶叶品质起着至关重要的作用,探讨土壤磷素含量的空间分布特征及其影响因素,可以为茶园管理和茶叶品质的提升提供理论指导。以江苏省东山镇和浙江省溪龙乡两个优质名茶种植区为例,在遥感影像和DEM数据的基础上,应用地统计学方法,对比研究了两个茶园土壤速效磷含量的空间异质性特征。结果表明:(1)按土壤肥力等级标准,东山镇和溪龙乡速效磷含量的平均水平均较高,利于茶叶生长;(2)东山镇和溪龙乡速效磷含量的变异系数分别为0.46和0.52,均属于中等强度变异;(3)空间插值结果显示,东山镇和溪龙乡速效磷在空间上都具有相连成片的特征,但东山镇速效磷呈阶梯状分布特征,而溪龙乡速效磷则呈辐射状分布特征;(4)东山镇和溪龙乡速效磷的块基比值分别为0.343和0.142,表明溪龙乡速效磷受随机性因素的影响较东山镇的小,而受结构性因素的影响较东山镇的大。
The content of phosphorus in soil plays an important role on soil fertility and tea quality. The discussion on the spatial distribution of soil phosphorus content and its influencing factors can provide theoretical guidance for tea plantation management and tea quality improvement. Taking Dongshan Town in Jiangsu Province and Xilong Town in Zhejiang Province as an example, based on remote sensing images and DEM data, geostatistics methods were used to study the spatial differences of available phosphorus in two tea plantations Qualitative characteristics. The results showed that: (1) According to soil fertility level, the average available phosphorus content in Dongshan and Xirong Township were higher, which was benefit to the growth of tea. (2) The variation coefficients of available phosphorus in Dongshan and Xirong Townships were 0.46 And 0.52, all belong to moderate intensity variation. (3) The spatial interpolation results showed that available phosphorus in Dongshan and Xixiang Township was spatially connected, but the available phosphorus in Dongshan was in a ladder-like distribution. (4) The ratio of available P in Dongshan and Xixiang Township was 0.343 and 0.142, respectively, indicating that available phosphorus in Xilong Township is less affected by random factors than that in Dongshan Township, and Affected by the structural factors larger than the town of Dongshan.