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为摸清贵州黄壤铝形态特征,采用连续提取法分析了贵州黄壤铝的不同形态并探讨其影响因素。结果表明,酸性黄壤中结晶态铝氢氧化物和原生、次生矿物态铝平均含量为68.67gkg-1,占总铝的97.58%;活性铝(包括交换态铝、吸附态羟基铝和有机络合态铝)平均含量为1.66gkg-1,仅占2.42%。在影响黄壤铝形态分布的土壤因子中,土壤类型对土壤交换态铝、吸附态羟基铝和剩余铝的影响排序为白鳝泥>黄泥土>黄砂泥土,对有机配合态铝为黄泥土>白鳝泥、黄砂泥土;母质对交换态铝和有机配合态铝的影响排序为砂页岩>白云岩>页岩>老风化壳,对吸附态羟基铝和剩余铝则为页岩>白云岩>砂页岩;交换态铝、吸附态羟基铝与土壤交换酸呈极显著正相关(r分别为0.870**和0.721**),有机络合态铝与土壤有机质呈显著正相关(r=0.668**),而与土壤交换酸呈极显著负相关(r=-0.761**)。
In order to understand the morphological characteristics of aluminum in Guizhou yellow soil, continuous extraction was used to analyze the different forms of aluminum in Guizhou yellow soil and to explore the influencing factors. The results showed that the average content of crystalline aluminum hydroxide, primary and secondary mineral aluminum in acidic yellow soil was 68.67gkg-1, accounting for 97.58% of total aluminum. The content of active aluminum (including exchangeable aluminum, aluminum hydroxyapatite and organic network The average content of aluminum is 1.66gkg-1, accounting for only 2.42%. Among the soil factors affecting the distribution of aluminum forms in yellow soil, the effects of soil types on soil exchangeable aluminum, adsorbed aluminum hydroxyaspartate and remaining aluminum were ranked as follows: eel mud> yellow soil> yellow sand soil, and organic aluminum as yellow soil> eel mud , Yellow sand soil; the influence of parent material on the exchangeable aluminum and organic complexation aluminum is ranked as sand shale> dolomite> shale> old weathering crust, while for the adsorbed hydroxy aluminum and the remaining aluminum, shale> dolomite> sand sheet (R = 0.870 ** and 0.721 **, respectively). There was a significant positive correlation between the organic aluminum in the organic complex and the organic matter in the soil (r = 0.668 ** ), But negatively correlated with soil exchange acid (r = -0.761 **).