稻田土壤养分的空间变异性研究  

Investigation on Spatial Variability of Soil Nutrients in Paddy Field

作　　者：高玉蓉[1] 许红卫[1] 周斌[1] 

机构地区：[1]浙江大学环境与资源学院农业资源科学系,浙江杭州310029

出　　处：《土壤通报》2005年第6期822-825,共4页Chinese Journal of Soil Science

基　　金：国家自然科学基金项目(40101014);浙江省教育厅项目

摘　　要：本研究以嘉善县陶庄农场内一块5.1hm2的水稻田为研究区,区内不规则采样,共128个采样点.以土壤的pH、有机质、全磷、全氮、碱解氮、速效钾和速效磷含量为研究对象,研究其相应的统计规律,结果表明土壤各养分属性的变异系数在6.3%～35.61%之间,pH为5.3%;采用地统计的半方差函数分析,发现有机质,全氮,碱解氮和速效钾在一定范围内存在空间相关性;采用克立格方法进行最优内插,绘制了养分含量分布图,并对其空间变异进行了初步分析.A 5.1 hectare paddy field in the Taozhuang farm at Jiashan county was selected for the study. Abnormity sampling method was adopted and there was 128 sampling points in this field. The statistical laws of soil pH, organic matter （OM）, total phosphorus （TP）, total nitrogen （TN）, alkaline hydrolyzable nitrogen （AHN）, available potassium （AK） and available phosphorus （AP） were analyzed, and the results indicated that the variation coefficient of soil nutrients was between 6.3% and 356.1%, pH was 5.3%. Using the geostatistical method of semivariogram, we found that organic matter, total nitrogen, alkaline hydrolyzable nitrogen and available potassium were correlated in a given spatial range. Using the group maps of the soil nutrients with Kriging, a preliminary evaluation for the spatial variability of those nutrients was made.

关 键 词：土壤养分 地统计学 空间变异 克立格插值 半方差函数 

分 类 号：S153.6[农业科学—土壤学]