森林土壤有机质层中多酚类物质的生态反馈意义

对欧洲中部成熟云杉林分在改造和更新后土壤有机质层中多酚类物质（多酚、缩合单宁）以及与其它化学和生物性质变化的比较，探索了多酚类物质在森林生态系统中的调节功能。结果表明，多酚含量与有效离子交换量（ECEC）呈显著相关性，而与有机含量无显著相关。土壤净矿化率与多酚、有机质C、C/N无显著相关性，而同缩合单宁含量呈显著负相关。同时，土壤多酚含量与土壤可溶性N、C（1mol·L^-1KCl浸提）呈显著正相关。说明多酚类物质虽然在林木自身代谢中没有明显的生理作用，但在整个森林生态系统中的反馈意义应引起重视。

Ecological feedback significance of polyphenols in organic layer of forest soil

By comparing polyphenols (total polyphenols and condensed tannin) and other chemical and biological properties in soil organic layers during the transformation and regeneration of pure mature spruce stand in middle Europe, the functions of polyphenols in forest ecosystem were approached. The results showed that polyphenols concentration had a significant positive correlation with effective cation exchange capacity (ECEC), but no relation with organic C. The net N mineralization had no significant correlation with total polyphenols, organic C and C/N ratio, but had a significant negative correlation with condensed tannin. Polyphenols concentration also positively correlated with 1 mol.L.-1 KCl extractable C and N. It is suggest that although the polyphenols have no obvious physiological function in tree metabolism, it should be paid attention to its ecological feedback significance in the whole ecosystem.