Based on the field survey and laboratory analysis, the soil humus composition in five soil types (yellow soil, red earth, moisture sandy soil, alpine meadow soil and purple soil) of tea garden in Wuyishan city were investigated. The results showed that the content of humic acid(HA), fulvic acid(FA) and Humin(HM) decreased with the soil depth. There were significant differences of humus composition among different soil types. The humus composition and carbon level in alpine meadow soil of tea garden were significantly higher than those in other soil types, followed by those in yellow soil and purple soil, the lowest was in red soil. Humin was the main composition of humus(57.06%-79.76%). Except alpine meadow soil, the proportion FA were more than those in HA. The △log K and E4/E6 value of FA was higher than HA. The △log K and E4/E6 value in alpine meadow soil and red soil were the lowest and highest, respectively. The soil humus composition were significantly correlated with soil organic carbon and phenol contents, total N, soil bulk density and soil porosity, but no significant correlated with C/N, pH value and soil moister. Thus, the major type of humus was humin in all five kinds of tea garden soils,alpine meadow soil belonged to the humic acid type soil, and others belonged to fulvic acid enriched soil.
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