【摘要】 为研究各类型土壤的肥力差异,初步分析了紫色土、黄棕壤、高山草甸土、石灰岩土、棕色针叶林土、棕壤、暗棕壤、红壤这8种典型土壤的腐殖质组成和性质。结果表明:仅红壤、黄棕壤的腐殖质含量属中等含量,其余6种均属高含量。腐殖质组成中,均以胡敏素占绝大多数,除暗棕壤和棕色针叶林土外,各土样中富里酸的有机碳的相对数量均大于胡敏酸的有机碳的相对数量。胡敏素含量与腐殖质、有机碳含量呈极显著相关(P<0.01)。8种典型土样的腐殖化程度由高到低依次为:棕色针叶林土>暗棕壤>棕壤>紫色土>石灰岩土>黄棕壤>高山草甸土>红壤。各土样胡敏酸的复杂程度和化学稳定性序列为棕壤>暗棕壤>黄棕壤>紫色土>红壤>棕色针叶林土>高山草甸土>石灰岩土。各土样中富里酸的缩合度、芳香度和化学稳定性由高到低依次为:石灰岩土>高山草甸土>黄棕壤>紫色土>棕色针叶林土>暗棕壤>棕壤>红壤。更多还原

【Abstract】 In order to study the nutrition of different soils,the composition and nature of humus from the following 8 soils: purple soil,yellow-brown soil,mountain meadow soil,limestone soil,brown coniferous forest soil,brown soil,dark brown soil,red soil,were analyzed.The results showed that the contest of humus was medium in red soil and yellow-brown soil,those were high in the other 6 soils.Humin was the main composition of humus.Except dark brown soil and brown coniferous forest soil,the relative quantities of the organic carbon in fulvic acid were sour more than those in humic acid.The humin content was significantly correlated with the contents of humus and organic carbon(P<0.01).The rank of humification degree of 8 soils was as follows: brown coniferous forest soil>dark brown soil>brown soil>purple soil>limestone soil> yellow-brown soil> alpine meadow soil> red soil.The ranks of complexity and chemical stability of humic acid were as follows: brown soil> dark brown soil> yellow-brown soil> purple soil> red soil> brown coniferous forest soil> alpine meadow soil> limestone soil.The ranks of the condensation degree,aromaticity and chemical stability of fulvic acid were as follows: limestone soil> alpine meadow soil> yellow-brown soil> purple soil> brown coniferous forest soil> dark brown soil> brown soil> red soil.更多还原