乌尔禾区不同土地利用方式下土壤化学性质的差异

研究以乌尔禾区为研究区,利用3S技术对研究区遥感影像进行分类、土壤采集以及对不同土地利用方式下土壤化学性质空间分布规律进行分析。结果表明：①土层深度小于20cm的土地利用方式下,有效P表现为其他用地最大;有效N表现为交通运输用地最大;有效K表现为其他用地最大;总盐度表现为其他用地最大;有机质含量表现为交通运输用地最大;pH表现为住宅用地最大。土层深度大于20cm的土地利用方式下,有效P表现为其他用地最大;有效N表现为交通运输用地最大;有效K表现为其他用地最大;总盐度表现为交通运输用地最大;有机质含量表现为林地最大;pH表现为住宅用地最大。②运用经典地统计学法对有效P,有效N有效K,总盐,有机质及pH之间进行相关性分析。结果表明,大于20cm土层中都未达到0.05的显著性水平;而小于20cm土层中有机质与pH的相关性关系达到了0.05的显著性水平（R=-0.812）,总盐与有效P的相关性关系达到了0.01的显著性水平（R=0.882）。

Differences of Soil Chemical Properties under Different Land Use Types in Or'hu District

Or'hu district of Karamay City in Xinjiang was selected as study area.With the support of RS,GIS and GPS technology,the remote sensing image was classified,soil was collected and the spatial distribution law of soil chemical properties under different use way was analyzed.The results showed that ① under the land use way of soil depth less than 20 cm,the maximum of available P,available N,available K,total salt,organic matter content,pH value was other land,transportation land,other land,other land,transportation land and residential land respectively.Under the land use way of soil depth more than 20 cm,the maximum of available P,available N,available K,total salt,organic matter content,pH value was other land,transportation land,other land,transportation land,forest land,residential land respectively.②The classic statistical method was adopted to carry out correlation analysis among available P,available N,available K,total salt,organic matter and pH value.The results showed that no significant at 0.05 level in soil above 20 cm,the correlation between organic matter and pH value was up to 0.05 significant level in soil layer less than 20 cm(R=-0.812),and the correlation between total salt and available P was up to 0.01 significant level(R=0.812).