茶树根际土壤铝形态演变规律及其影响因素  

Evolvement of Aluminum Forms and Its Effect Factors in Tea Rhizospheric Soil

作　　者：刘少坤[1] 周卫军[1] 苗霄霖[1] 杨威[1] 杨君[1] 郭子川[1] 

机构地区：[1]湖南农业大学资源环境学院,长沙410128

出　　处：《土壤》2014年第5期881-885,共5页Soils

基　　金：国家自然科学基金项目(41071204)资助

摘　　要：茶树是典型的喜酸聚铝植物,为了弄清茶树根际土壤铝的形态特征及其演变规律,本文采集了湖南省不同茶厂、不同母质和不同种植年限的茶树根际土壤,研究了茶树根际土壤铝的形态演变规律及其影响因素。结果表明,不同茶厂由于地域、母质、种植年限等的差异,茶树根际土壤铝形态含量有明显的差异,含量变化为腐殖酸铝>铝的水合氧化物和氢氧化物≈交换态铝>无机吸附态铝;除腐殖酸铝外,其他3种形态铝含量均以第四纪红色黏土发育的茶树根际土壤的含量最高,且不同形态铝含量有随着茶树种植年限延长而增高的趋势。土壤交换性酸与水解性酸对茶树根际土壤铝形态有显著的影响,而与p H的关系不大;土壤有机质含量影响茶树根际土壤铝形态特征,与无机吸附态铝呈显著正相关关系,与腐殖酸铝有极显著正相关关系。The evolvement of aluminum （Al） forms and its effect factors were studied in tea rhizospheric soil collected from different tea factories, parent materials and planting ages, in order to understand further the form character and evolvement rule of Al in tea rhizospheric soil, due to characterizing favor acid soil and accumulation Al in tea growth. The results showed the obvious difference of different A; forms, their change order was humic acid Al（HL） 〉 Al of hydrous oxide and hydroxide （OHL） exchangeable Al （EL） 〉 inorganic adsorption Al （IL）, because of the difference of location, parent material, planting age and etc at tea factory. Beside HL, the content of other three forms Al was the greatest in the tea rhizospheric soil derived from the quaternary red clay, while an increase trend was observed with increase of planting ages. The significantly effect of soil exchangeable acidity and hydrolytic acidity on different Al forms was found, however the significant correlation was not observed between pH and Al forms. The content of soil organic matter affected Al forms, showed significantly positive correlation with IL and extremely significantly positive correlation with HL in tea rhizospheric soil.

关 键 词：茶园 根际土壤 铝形态 演变 影响因子 

分 类 号：S158.4[农业科学—土壤学] S153.4[农业科学—农业基础科学]