论文部分内容阅读
调查分析了我国南方亚热带林区不同母岩、不同林分下１４个样地的土壤和林木当年生叶及林地枯落物的微量元素状况，探讨了微量元素（硼、钼、铜、锌、铁、锰）的地球化学特性，及其在母岩———土壤———森林系统中的分布规律。结果表明，土壤微量元素全量大小主要取决于母岩类型、风化和土壤形成特点等因子。除岩性外，林分类型（杉木、火炬松和麻栎）对微量元素有效量的影响也是非常明显的。林地土壤中钼、铜、锌和锰４种元素的全量与有效量之间存在着明显的相关关系；而铁的全量和有效量之间无明显的线性或非线性关系；各林地土壤中硼的有效量均保持在０３０ｍｇ·ｋｇ－１左右，与其全量多少无关。不同母岩不但影响土壤中各微量元素的含量，而且也影响到相应林分枯落物层中的微量元素状况。
The trace elements in soils and forest litters of soils and forest litters under different rock masses and 14 plots under different stands in the southern subtropical forest of China were investigated and analyzed. The effects of trace elements (boron, molybdenum, copper, zinc, Iron, manganese) geochemical characteristics, and its distribution in the parent rock --- soil - forest system. The results show that the total amount of soil trace elements mainly depends on the type of rock, weathering and soil formation and other factors. In addition to lithology, the impact of stand type (fir, loblolly pine and oak) on the effective amount of trace elements is also evident. There was a significant correlation between the total amount and the effective amount of the four elements of molybdenum, copper, zinc and manganese in forest soils, while there was no obvious linear or nonlinear relationship between the total amount and the effective amount of iron. The effective amount were maintained at 0 30mg · kg-1 or so, regardless of the total amount of how much. Different mother rocks not only affect the content of trace elements in soil, but also affect the status of trace elements in litter of corresponding stands.