【摘要】 以香蕉种植区127hm2香蕉地为研究对象,网格法(100m×100m)采集表层(0~30cm)土样170个,采用传统统计和地统计学相结合的方法,研究土壤pH及速效钾的空间变异特征。结果表明:土壤pH和速效钾有明显的空间变异结构;pH变异函数符合线性模型,速效钾符合指数模型,pH和速效钾具有中等的空间相关性;土壤速效钾与pH呈极显著正相关,表明研究区域内土壤钾素的有效性受土壤pH的明显影响,土壤pH的升高或降低是导致土壤速效钾变化的主要原因之一。通过研究土壤速效钾的空间变异性,获取香蕉地土壤速效钾、pH的连续分布图,为土壤钾养分分区管理及科学施肥提供依据。更多还原

【Abstract】 170 soil samples of plough layer(0～30 cm) were collected by 100m×100m grid sampling in a banana plantation with 127 hm~2 area,and the character of spatial variation of soil pH and available potassium were studied through traditional statistics and geostatistics.The results showed that the structure of spatial variation of soil pH and available potassium were obvious,the spatial variability of soil available potassium and pH was well fitted by exponential model and spherical model,respectively.The spatial correlation between available potassium and pH was moderate.The positive correlation between soil available potassium and pH was remarkable,it indicated that the availability of soil potassium was obviously affected by soil pH in banana plantation,the increase and decrease of soil pH is one of the main reasons,which result in the variety of soil available potassium.Continued distribution map of soil available potassium and pH were obtained through researching on the spatial variability of soil available potassium,and it could provide reference to the management and scientific fertilization of soil potassium nutrient.更多还原