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为摸清贵州省中部黄壤中锰的组成特征,采集了22个代表性黄壤表土样品,用连续提取法研究了黄壤锰的形态组成,并探讨影响锰形态的土壤因素。结果表明,黄壤中结晶态锰氧化物和原生、次生矿物态锰平均含量为346.1 mg kg-1,占总锰的66.1%;活性锰(包括交换态锰、易还原态锰和有机态锰)平均含量为195.6 mg kg-1,仅占33.9%。不同土属的黄壤中不同形态锰含量:黄泥土>黄砂泥土>白鳝泥;交换态锰、易还原态锰和剩余锰为老风化壳>白云岩>页岩>砂页岩;有机态锰含量:老风化壳>页岩>白云岩>砂页岩。交换态锰、易还原态锰与土壤pH呈极显著负相关(r分别为-0.793**和-0.913**),有机态锰与土壤pH呈极显著负相关(r=-0.770**)。
In order to understand the composition of manganese in the yellow soil of central Guizhou Province, 22 representative yellow soil samples were collected. The morphological composition of yellow soil was studied by continuous extraction method and the soil factors affecting the morphology of manganese were discussed. The results showed that the average contents of manganese and its primary and secondary manganese minerals in yellow soil were 346.1 mg kg-1, accounting for 66.1% of the total manganese. Active manganese (including exchangeable manganese, readily-reducible manganese and organic manganese ) Averaged 195.6 mg kg-1, accounting for only 33.9%. Different forms of yellow soil in different soil genus different forms of manganese content: yellow soil> yellow sand soil> eel mud; exchangeable manganese, easily reduced manganese and the remaining manganese for the weathering crust> dolomite> shale> sand shale; organic manganese content : Old Weathering Shell> Shale> Dolomite> Sand Shale. Exchangeable manganese and easily reduced manganese showed extremely significant negative correlation with soil pH (r = -0.793 ** and -0.913 **, respectively). There was a significant negative correlation between organic manganese and soil pH (r = -0.770 **) .