海南省琼中县橡胶园土壤磷素空间变异特征及磷肥分区管理分析

Spatial Variability and Regionalized Management of Soil Phosphorus Nutrients in the Rubber Plantation in Qiongzhong county

运用地统计学和GIS相结合对琼中县橡胶同土壤磷素营养进行了空间变异特征及分区管理研究。结果表明．琼中县胶园各土层土壤全磷和有效磷含量的最大相关距离是17．23～52．09km．全磷含量以大块状变异为主，有效磷含量各等级的分布为大、小块状交叉分布；琼中县橡胶园0～20cm土层、20～40cm土层全磷含量处于第五等级的极低水平的比例分别为91．22％和82．8％．0～20cm土层有效磷含量多数处于中等偏上水平．而20-40cm土层有效磷含量处于第5等级及以下的极低水平的比例为60．6％：应用空间叠加方法．进行了橡胶园土壤磷素管理分区．琼中县胶园可分为11个管理分区．在胶园施肥管理中应根据不同管理分区的特点采取不同的磷素营养管理措施．

Geostatistics combined with GIS were applied management of soil phosphorus（P）in Qiongzhong County. of Total P, available P in content in different soil layers to analyze the spatial variability and regionalized The results showed that the maximum correlative distance were between 17.23 km and 52.09 km. Spatial variability of total P was large block scale, and spatial variability of available P was large block scale and small lock scale. Percentage of total P in soil（0-20 cm） and soi1（20-40 cm） under five level was 91.22% and 82.8%. Available P in soil （0-20 cm） distributed mainly in medium to high level, but percentage of available P in soil （20-40 cm） under five level was 60.6%. By overlaying method of the space, regionalized management maps of the soil P content was drawed. The rubber plantation was divided into 11 management units. Thus this study provided a basis for the effective use of soil and fertilizer to carry out according to the management unit.