莱州湾南岸不同土地利用和土地覆被下土壤盐分含量特征

运用经典统计学和地统计学的方法研究了莱州湾南岸地区不同土地利用和土地覆被下土壤盐分含量的特征及分布情况。研究结果表明：不同空间位置不同层位的土壤盐分含量差异性较大;土壤盐分含量表现出盐田＞棉花＞林地＞杂草＞大豆＞玉米的现象;除林地60～90 cm土壤盐分变异系数具有强变异外,其它各层土壤盐分含量均具有中等变异性;表层土壤盐分含量具有中等空间自相关性,其它土层土壤盐分含量具有强的空间自相关性;研究区各层土壤盐分的空间分布均表现出条带状和斑块状格局,以轻盐渍化和中度盐渍化为主。

Characteristics of Soil Salinity Under the Cases of Different Land Use and Land Covers in the Southern Coastal Area of the Laizhou Bay

The characteristics and distributions of soil salinity under the cases of different land use and land covers in the southern coastal area of the Laizhou Bay are studied by using both the classical and the geological statistics.The results reveal that the soil salinity differs distinctly at different positions and in different layers.The salinity of the soils increases in the order of salt-land〉cotton-land 〉 wood land 〉 weed land 〉 soyland 〉 corn-land.The variation coefficients of the soil salinity in all layers of the lands are moderate,except for the woodland in which the 60-90 cm layer varies strongly.The salinity of the surface soils shows a moderate spatial autocorrelation,whereas other layers of the soils show a strong one.The distributions of the soil salinity in different layers in the study area generally show a band- and/or a patchy-like pattern,which is dominated with slight and moderate salinization.