摘要
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**)。
Aluminum forms and their distribution characteristics in yellow soils in Guizhou were investigated by using sequential extraction method, and the relationships between different Al forms and soil types,parent materials or soil exchangeable acidity（Ex-A） were discussed. The results were as follows：in yellow soils inert Al（residual Al（Res-Al）was crystalline hydroxide Al and primary or secondary mineral Al accounting for 97.58%. Active Al （including exchangeable Al（Ex-Al）, adsorbed inorganic hydroxy-Al（Hy-Al） and organic complexed Al（Or-Al） only accounted for 2.42% and had great relationships with soil acidity and Al biotic-toxicity. Soil types, parent materials,soil organic matter and soil Ex-A were major factors of influencing distribution of Al forms. There were correlation between soil Ex-A and Ex-Al （r=0.870^＊＊）or Hy-Al （r=0.721^＊＊）, soil Or-Al and soil organic matter （r=0.668^＊＊）or soil Ex-A （r=-0.761^＊＊）.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第5期1044-1048,共5页
Chinese Journal of Soil Science
基金
贵州省"十一五"农业科技攻关项目(NY(2007)3017号)
贵州省农科院专项资金资助
中央补助地方科技基础条件专项资金项目(院所创能2007-012)
贵州省省级科研机构创新能力建设专项资金项目(2007)22号
关键词
土壤铝形态
交换态铝
吸附态羟基铝
有机络合态铝
剩余铝
Aluminum forms in soils
Exchangeable Al
Adsorbed hydroxy-Al
Organic complexed Al
Residual Al
