岳麓山风景区坡面林地土壤理化特征评析  

Review and Analysis of Soil Physical and Chemical Characteristics on Woodland Slope in Yuelu Mountain

作　　者：王玲[1] 吕殿青[1] 覃志斌[1] 王宏[1] 侯旭磊[1] 刘小梅[1] 

机构地区：[1]湖南师范大学资源与环境科学学院,中国长沙410081

出　　处：《湖南师范大学自然科学学报》2011年第2期84-88,共5页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(40801083);湖南省重点学科资助项目(2008001);湖南省教育厅青年项目(09B061)

摘　　要：以岳麓山林地坡面为研究区域,室内试验确定不同坡位土壤的容重、孔隙度、含水量、有机质量分数与pH值,运用统计等方法分析5个理化性质的坡面空间分异特征.结果表明,土壤容重在1.320～1.524 g.cm-3之间,坡下容重大于坡上坡中,孔隙度在44%～51%之间,小孔隙比例大,坡上坡中孔隙度大于坡下.岳麓山坡面土壤由于在持续降雨后表层含水量高达70%以上,土壤体积发生膨胀,膨胀系数为166%.土壤有机质量分数在2.4%～4.2%之间,大小顺序为坡上>坡中>坡下.pH值在4～4.34之间,岳麓山林地属强酸性土壤,适宜酸性植物生长.有机质量分数和pH值呈显著负相关关系,坡面理化性质空间变异不明显.Woodland Slope in Yuelu Mountain was chosen as studied area in this work. Soil bulk density, porosities, water content, organic matter and pH value were measured in the lab. Spatial heterogeneity in slope about the five soil physical and chemical characteristics was studied by statistical method. The results show that soil bulk densities change from 1. 320 to 1. 524 g ·cm^-3 and are higher in the lower slope than that in upper slope and middle slope. The soil porosities are between 44% and 51% and are lower in the lower slope than that in upper slope and middle slope. Surface sol water mass contents are more than 70% after continuous rainfall. Soil volume swells and swelling coefficient is 166%. Soil organic matter is probably between 2.4% and 4.2% and the order of organic matter contents is upper slope, middle slope and lower slope. The pH values are from 4 to 4.34. It denominates that the soil of Yuelu Mountain is the strongly acidic soil and suitable for acidic plants growing and developing. A negative correlation in significant level exists between organic matter contents and pH values. Spatial heterogeneity in slope about soil physical and chemical characteristics is no obvious difference.

关 键 词：岳麓山 容重 土壤含水量 有机质 

分 类 号：S152.7[农业科学—土壤学]