重庆石灰岩地区植被恢复过程土壤酶活性与植物多样性的关系

Correlation Between Soil Enzyme Activities and Biodiversity During the Recovery Process of Vegetation in a Limestone Area

以空间代替时间选取石灰岩地区植被恢复过程的3个阶段(乔木林,灌木林和草本)进行土壤酶活性及其植物多样性研究,对探索石灰岩地区植被恢复过程的生态学机制有重要意义.结果表明,重庆石灰岩地区植被恢复过程中植物多样性增加,多样性指数各阶段大小依次为灌木林(S2)、乔木林(S3)、草本(S1),同样随着植被恢复土壤酶活性增强,各阶段土壤酶活性大小依次为灌木林(S2)、乔木林(S3)、草本(S1).相关性研究表明,群落植物多样性与碱性磷酸酶、蛋白酶、过氧化氢酶活性呈显著或者极显著相关性,但多酚氧化酶活性与各阶段多样性指数之间在C层土壤中表现不显著的负相关性.

Soil enzyme activities and plant biodiversity at different recovery phases（tree forest, shrub forest and herb）in a limestone area are investigated, using spatial sequence instead of temporal sequence, to study the ecological mechanism of restoration in limestone areas. The results show that biodiversity indexes increase with the restoring process of vegetation. Comparison of the biodiversity indexes at 3 restoring phases （herb, shrub forest and tree forest） indicates a sequence of shrub （S2） 〉tree forest （S3）〉 herb （S1）, and a similar sequence is noticed for soil enzyme activities. Significant or highly significant positive correlation exists between plant biodiversity and the activities of alkaline phosphatase, protease and peroxide hydrogenase while polyphenol oxidase displays a non-significant negative correlation with plant biodiversity in C layer of the soil.