冀北山地南麓油松蒙古栎混交林土壤物理性质研究

Study on Soil Physical Properties of Mixed Forest of Pinus tabuliformis and Quercus mongolica in the Southern Foothills of Mountainous Area of Northern Hebei Province

为明确冀北山地南麓油松蒙古栎混交林土壤物理性质,并探究其水土保持能力,选取油松纯林、蒙古栎纯林、油栎混交林为研究对象,对其土壤物理性质进行差异分析。结果表明:土壤容重均值以油松纯林(1.26 g·cm^(-3))>油栎混交林(1.21 g·cm^(-3))>蒙古栎纯林(1.08 g·cm^(-3));土壤总孔隙度均值以油松纯林(42.39%)<油栎混交林(43.32%)<蒙古栎纯林(51.53%);土壤最大持水率与土壤毛管持水率呈现出相同的大小关系为蒙古栎纯林>油栎混交林>油松纯林;土壤孔隙度随土层深度的增加均呈现出递减的态势,而土壤容重对土层深度的增加体现出递增的变化趋势。

In order to clarify the soil physical properties of mixed forest of Pinus tabuliformis and Quercus mongolica in the southern foothills of mountainous area of northern Hebei Province,and to explore its water and soil conservation ability,Pinus tabuliformis pure forest,Quercus mongolica pure forest and mixed forest of Pinus tabuliformis and Quercus mongolica were selected as the research objects,and their differences in soil physical properties were analyzed.The results showed that the mean soil bulk density was as follows:Pinus tabuliformis pure forest(1.26 g·cm^(-3))>mixed forest of Pinus tabuliformis and Quercus mongolica(1.21 g·cm^(-3))>Quercus mongolica pure forest(1.08 g·cm^(-3)).The mean total soil porosity was as follows:Pinus tabuliformis pure forest(42.39%)mixed forest of Pinus tabuliformis and Quercus mongolica>Pinus tabuliformis pure forest.Soil porosity decreased with the increase of soil depth,while the soil bulk density showed increasing trend with the increase of soil depth.