【摘要】 采用传统统计与地统计学相结合的方法,对太湖典型地区宜兴市大浦镇湖滨公路以东50hm2蔬菜地耕层土壤养分及pH空间变异特征进行了研究。结果表明,研究区域8种不同土壤因子的空间变异结构存在较大差异,全P、全N、NH+4-N、速效P和速效K有明显的空间变异结构,其中,速效P经对数转化后符合线性有基台模型,NH+4-N经对数转化后符合线性无基台模型,其他均符合指数模型;全P、NH+4-N、速效P和速效K具有中等的空间相关性,土壤pH和全N有强烈的空间相关性;8种土壤因子的空间自相关范围具有明显差异,土壤NH+4-N的变程最大,为1226m,速效P和速效K的变程分别是587和498m,其他土壤因子变程为84～201m。更多还原

【Abstract】 In the present investigation,156 top layer soil samples （0-20 cm） were taken in a regular grid of 50 m by 50 m at 50 hm2 area of vegetable plot located at the east part of Taihui road in Dapu town,Yixing city.Characteristics of spatial variability of soil nutrients and pH were studied by using traditional statistics and geo-statistics.The results showed:there were obvious differences between eight soil nutrients in spatial variation-structure.Semivariograms for available soil P fitted linear model,NH+₄-N fitted linear model,others fitted exponential model.Spatial correlation in total nitrogen and pH lay in intensity.Total P,available P,NH+₄-N,available K,available N were moderate.There were obvious differences between eight soil nutrients in correlated distance.NH+₄-N had largest correlated distance of all,about 1 226 m.NH+₄-N spatial correlation was violent in relative large scale.While available P and available K had middle correlated distance,about 587 m and 498 m.The correlated distance of others was in the range of 84-201 m.更多还原