海南岛土壤中的铅

铅对动植物是有毒的,土壤中铅的含量过高,会引起人、畜的地方性疾病。研究结果表明,海南岛土壤中铅的含量大多数在10—40mg kg~(-1)之间,属于正常范围值,但玄武岩发育的土壤含铅量偏高,在230mg kg~(-1)左右。该岛土壤中铅的含量往往随剖面深度的增加而增大。因成土条件的差异,土壤铅含量有一定的地理分异规律,东北部玄武岩地区土壤含铅量比其它地区高数倍,西部干热地区土壤含铅量往往比东部湿热地区高。土壤中铅含量与土壤母质、质地、pH值和土壤中化合物种类等因素有关,但以土壤母质的影响更为突出。

LEAD IN SOILS IN HAINAN ISLAND

Lead may be harmful to human body when it's content in soils goes beyond the normal level. The content of lead in soils of Hainan Island ranges from 6.20 to 262.20mg kg~(-1), and is often higher in lower layer of soils than in surface layer, higher in the west part of the Island than in the east part, and affected by a series of factors such as soil parent material, climate and soil property, etc., especially by soil parent material.