论文部分内容阅读
通过浸提试验研究了不同浓度茶叶提取物、儿茶素和表没食子儿茶素没食子酸脂(EGCG)3种茶多酚(TPs)和不同p H下EGCG对漂洗水稻土和黄壤Si、Al和Fe活化的影响。结果表明:(1)随TPs浓度升高,土壤Si活化量在茶叶提取物和儿茶素作用下总体上均增加,在EGCG作用下却先增后减;Al、Fe活化量在各TP作用下均增加。同一浓度下,各TP活化Si的量均为漂洗水稻土>黄壤,活化Al或Fe的量均为黄壤>漂洗水稻土。(2)随EGCG溶液p H升高,Si活化量为漂洗水稻土降低,黄壤增加;Al、Fe活化量为2种土壤均增加。同一p H下,EGCG活化Si的量p H≤5.5时为漂洗水稻土>黄壤,p H=6.5时为黄壤>漂洗水稻土;活化Al、Fe的量均为黄壤>漂洗水稻土。综上,TPs浓度和p H对不同土壤Si、Al和Fe的活化有不同影响。
Three kinds of tea polyphenols (TPs) with different concentrations of tea extract, catechin and epigallocatechin gallate (EGCG) and EGCG at different pH were used to study the effect of Si and Al on rye paddy soil and yellow soil And Fe activation. The results showed that: (1) With the increase of TPs concentration, the amount of soil Si activation increased as a whole under the action of tea extract and catechin, but increased first and then decreased under the action of EGCG; Under the increase. At the same concentration, the amount of Si activated by each TP was rye paddy> yellow soil, and the amount of activated Al or Fe was yellow soil> rinsed paddy soil. (2) With the increase of p H of EGCG solution, the activation amount of Si decreased for rinsing paddy soil and yellow soil increased; the activation amount of Al and Fe increased for both soil types. Under the same p H, the amount of activated Si in EGCG was rye paddy> yellow soil when p H≤5.5, yellow soil was p r = 6.5, rye paddy soil was activated, and amount of activated Al and Fe were both yellow soil> rinsed paddy soil. In summary, TPs concentration and p H have different effects on the activation of Si, Al and Fe in different soils.