根据土壤化学特征划分伏牛山亚热带北界

The boundary between subtropical zone and temperate zone is not only important in physical geography, but also attractive in agricultural production. Seven soil profiles studied in this paper are placed along the southern slope of Funiu Mountain at different heights above sea level.Many compositions and properties of these soils have been determined in laboratory. In this paper,the laws of migration and accumulation of soil materials on the southern slope of Funiu Mountain are discussed first, then the division of the boundary between subtropical zone and temperate zone in this area according to soil geochemistry is discussed with qualitative methods and mathematical classification method in which twelve selected indexes such as Km, Saf, Ba, β, Feo/Fet, Mno/Mnt and so on are used. The result indicates that the boundary between subtropical zone and temperate zone on the southern slope of Funiu Mountain is about 950 m above sea level.     

试从土壤腐殖质组成和性质论伏牛山南侧亚热带北界的划分

本文首先综述前人对伏牛山南侧热带北界划分的研究成果，并指出了产生分歧的原因。然后作者通过对伏牛山中段南坡不同海拔高度七个土壤剖面的野外调查和室内土壤腐殖质组成和性质的分析，选择各剖面点的海拔高度、有机碳、胡敏酸（HA）、富有酸（FA）、胡富比（HA／FA）、E4、E6、E4／E6等指标，运用聚类分析等方法，探讨了伏牛山南侧亚热带北界的划分。研究结果表明，该界线大约在拔1000m左右。