温度对EGCG和柠檬酸活化土壤硅铝铁锰的影响  

Effects of EGCG and Citric Acid on Mobilization of Soil Mineral Elements at Different Temperatures

作　　者：何刚[1,2] 袁大刚[1] 张俊思[1] 母媛 张东坡[1] 王昌全[1] 

机构地区：[1]四川农业大学资源学院,成都611130 [2]宜宾市农业局土壤肥料站,四川宜宾644099

出　　处：《土壤》2015年第6期1163-1169,共7页Soils

基　　金：国家自然科学基金面上项目(41372130)资助

摘　　要：通过浸提试验研究了温度对浓度均为5 mmol/L的表没食子儿茶素没食子酸脂(EGCG)和柠檬酸活化漂洗水稻土和黄壤矿质元素的影响。结果表明:随温度升高,EGCG和柠檬酸对2种土壤Si、Al、Fe和Mn的活化量均不同程度增加,表明EGCG和柠檬酸活化土壤矿质元素的能力在高温季节将得以增强。相同温度下,从元素间比较来看,EGCG和柠檬酸对2种土壤元素的活化量大小均为Al>Si>Fe(Mn),表明EGCG和柠檬酸作用下土壤Al较Si、Fe和Mn更易活化;柠檬酸对2种土壤Fe、Mn的活化量均为Fe>Mn,而EGCG对漂洗水稻土为Fe>Mn,对黄壤则为Mn>Fe;从土壤间比较来看,EGCG和柠檬酸对2种土壤Si的活化量均为漂洗水稻土>黄壤,对Al、Fe和Mn的活化量则为黄壤>漂洗水稻土;从酚与酸的比较来看,柠檬酸对2种土壤Si、Al、Fe的活化量均显著高于EGCG,表明柠檬酸比EGCG对土壤Si、Al和Fe有更强的活化能力。Extraction experiments were performed to estimate the effect of temperature of EGCG and citric acid on mobilization of Si, Al, Fe and Mn in Bleached Paddy Soil and Yellow Earth. The obtained data demonstrated that： the amount of Si, Al, Fe or Mn mobilized by EGCG or citric acid from 2 soils increased with increasing temperature overall, which indicated that both EGCG and citric acid can improve the amount of mineral elements mobilized, especially in the season of high temperature. At the same temperature, the comparisons among the amount of mobilized elements showed that EGCG or citric acid mobilized the decreasing amounts of mineral elements in the following order of Al 〉 Si 〉 Fe （Mn）, indicating that Al was more easily mobilized than Si, Fe or Mn. The amounts of Fe mobilized by citric acid from 2 soils were larger than that of Mn, similarly, the amount of Fe mobilized by EGCG were also larger than that of Mn from Bleached Paddy Soil, while for Yellow Earth, the opposite phenomenon that EGCG mobilized more Mn than Fe was observed. Meanwhile, with regard to the 2 different soils, the amount of Al, Fe or Mn mobilized by EGCG or citric acid was always higher for Yellow Earth compared to the Bleached Paddy Soil, but the amount of Si mobilized was higher for Bleached Paddy Soil. Moreover, as far as EGCG and citric acid were concerned, citric acid was found to mobilize significantly more Si, Al or Fe than EGCG from 2 soils, suggesting that citric acid had stronger ability in mobilizing soil Si, Al and Fe.

关 键 词：温度 EGCG 柠檬酸 矿质元素 活化 

分 类 号：S153[农业科学—土壤学]