【摘要】 利用地统计学工具对浙江省上虞市海涂围垦区土壤电导率和有机质进行了空间变异性研究,同时利用多时相陆地卫星影像进行了围垦区范围变化和土地利用变化监测。结果表明,土壤特性由于生产管理实践的不同而发生了较大的变异,最新围垦的土壤具有较好的异质性,而较早围垦的土壤的异质性较差,其中电导率整体随围垦历史的增加呈明显的下降趋势,其变异程度最大,而土壤有机质则随围垦历史的增加呈上升趋势。从1969年到1996年,样区内新增围垦土地15668 hm2。不同时期围垦的土地,其主要利用类型有着明显的差异,从新围垦区裸露的盐碱地和水产养殖塘,逐步过渡到棉花田及老围垦区的水稻田和果园,反映了该地区土壤特性变异对土地利用类型的影响。更多还原

【Abstract】 Spatial variability of coastal saline soil electrical conductivity and organic matter in Shangyu County in Zhejiang province were studied using geostatistical analysis,and the change of endykement and land use type were detected based on the multi-temporal Landsat imagery.The results indicated that coastal saline soil properties have changed greatly due to the different management practice,the soil in newly reclaimed region has better heterogeneity than that in early reclaimed region.Soil electrical conductivity as a whole have declined distinctly with the increase of reclamation history and has the largest coefficient of variation,whereas soil organic matter presents an ascending trend with the increase of reclamation history.The area of increased land was up to 15668 ha from the year of 1969 to the year of 1996 in the studied region.The main land use types have obvious difference in different reclaimed region,from bare saline field to aqua-farm pond,to cotton field,to paddy field and to orchard,these transitions reflect the effect of the soil properties particular soil salinity variability on land use type.更多还原