【摘要】 采用TOC 5000A总有机碳仪测定了福建主要森林类型土壤溶解有机碳(DOC)的含量,分析了土壤溶解有机碳与土壤因子的关系。结果表明:南方酸性森林土壤中,DOC与有机碳总量、全氮、全磷、碱解氮、有效磷和速效钾等养分因子之间呈极显著或显著的正相关关系,因而可以作为评价土壤肥力性状的生物学指标。土壤DOC与土壤中有机络合态铁、有机络合态铝和活性羟基铝之间呈极显著或显著的正相关。土壤中有机碳是影响土壤中铝和铁的溶出及迁移的一个重要因子。土壤DOC与pH值之间在一定的范围内呈极显著的负相关关系,因而土壤中铝的吸附、保持及溶解铝的排出受到溶液中DOC的强烈控制。土壤DOC与交换性铝之间无显著相关性。表2参14更多还原

【Abstract】 The dissolved organic carbon(DOC)of forest soil in Fujian Province was tested with TOC 5000A Organic Carbon Instrument.The relationship between soil DOC and soil factors were analyzed.The findings show that there is a very significant positive correlation between the concentration of DOC and the concentrations of organic carbon,total nitrogen,total phosphourus,available nitrogen,available phosphorus and available potassium.So DOC can be used as an index of soil fertility.A very significant positive or a positive correlation is found between the DOC concentration of soil and the concentration of organic iron,organic aluminum and active aluminum,which means that soil DOC is one of the important factors controlling the migration of aluminum and iron in soil.A very significant negative correlation is found between the concentrations of DOC and soil pH value.In the acid forest soil of south China,the absorption,maintenance and release of aluminum and iron are strongly controlled by DOC.There is no significant correlation between soil DOC and exchangeable aluminum.更多还原