草甸白浆土有效磷的空间变异性

土壤养分通常具有较大的空间变异性，且变异规律随土壤类型和养分的变化而变化。对黑龙江省密山市长期试验点的草甸白浆土通过经典统计学方法和地统计学方法0～20cm和20～40cm两层土壤有效磷的变异性进行了分析。经典统计学分析结果表明草甸白浆土有效磷具有中等至较强程度的变异。地统计学结果表明草甸白浆土有效磷最大相关距离在85m左右，两层土壤的块金方差/基台值分别为47.63%和34.87%具有中等至较强程度的空间相关性。

Spatial Variability of Available Phosphor of Meadow Albic Bleached Soil

Soil nutrients often appear great variability in spatial, and their variability characteristic change with the types of soil and nutrient. The variability characteristic of available phosphor of meadow albic bleached soil is analyzed by traditional statistics and geo-statistics technique. The soil samples were collected at two layers(0-20cm and 20-40cm) from a long-term test field in Mishan city Heilongjiang province long-term. The result from traditional statistics shows that the variability available phosphor of meadow albic bleached soil is between moderate and strong degree. The result from geo-statistics shows that the major range of available phosphor of meadow albic bleached soil is 85m around. the radios of nugget to still of to layers is 47.63% and 34.87% respectively, so the spatial correlation of them is between moderate and strong degree.