浙江古田山亚热带常绿阔叶林叶衰老物候影响因子研究

Studies on Affecting Factors of Leaf Senescence Phenology in a Subtropical Evergreen Broad-leaved Forest in Gutianshan, Zhejiang Province

摘要:

该文选取浙江省古田山亚热带常绿阔叶林72种木本植物，探究气候因素、系统发育关系和功能性状对亚热带常绿阔叶林叶衰老物候的影响。结果表明，叶变色期在9—12月，落叶期在10—12月。每月落叶物种数与月均温、月均降水量和月均日照时数没有显著相关性，每月叶变色物种数与月均温和月均日照时数呈弱相关；落叶性对叶变色期和落叶期具有显著影响；植物间系统发育关系对叶变色期和落叶期没有显著影响。因此，生物和非生物因子都会影响常绿阔叶树种的叶衰老，这对于提高秋季物候预测模型具有重要价值。

Abstract:

In order to explore the influencing factors of leaf senescence phenology in subtropical evergreen broad-leaved forest, the phylogenetic relationships, functional traits of 72 woody plants and climate factors were studied in Gutianshan subtropical evergreen broad-leaved forest in Zhejiang Province from November 2018 to February 2021. The results showed that the leaf coloration period was from September to December, and the leaf drop period was from October to December. There was no significant correlation between the number of leaf drop species and monthly average temperature, monthly average precipitation and monthly average sunshine duration. The monthly number of leaf coloration species had weak correlation with monthly average temperature and monthly average sunshine duration. The deciduous property had a significant effect on leaf coloration and leaf drop stages. The phylogenetic relationship among species had no significant effect on leaf coloration and leaf drop stages. Therefore, both biotic and abiotic factors could affect leaf senescence for evergreen broad-leaved species, which had an important value for improving the prediction models of autumn phenology.