35种校园木本植物春季物候与高度和茎密度的关系

The relationship between 35 woody plant species' spring phenology to their heights and stem tissue densities on a campus

植物物候是最重要的植物功能性状之一,在植物群落演替和生态系统物质循环方面具有重要意义,但目前的研究多关注非生物因子对植物物候的影响.以河南大学校园内35种木本植物为研究对象,调查每种植物的春季物候(展叶时间、爆芽时间)、个体高度和茎密度;利用单因素方差分析和简单线性回归,探究不同物种间的物候差异以及物候指标与其他功能性状指标间的关系.结果显示,木本植物的爆芽期处在2月16日(第46.6天)到4月8日(第97.6天)之间,展叶期处在3月13(第71.6天)到4月21(第110天)之间,爆芽期和展叶期均存在显著的种间差异.植物爆芽期与展叶期、爆芽期与高度、展叶期与高度、爆芽期与茎密度、展叶期与茎密度之间均存在显著的正相关关系.本研究表明春季绿化最好在3月上旬之前进行;结果可为提高当地植被绿化提供数据支持,在功能生态学研究中也具有一定的理论意义.

Previous studies have mainly been concerned with the effect of abiotic factors on plant phenology, but few have investigated the effects of height and stem tissue density on plant phenology. This study chose 35 woody plant species on the campus of Henan University and investigated their spring phenological parameters including the bud sprouting and the leaf spanning times, and measured plant height and tissue density. A one-way analysis of variance （ANOVA） was used to determine differences in spring phenology among the various species. Simple linear regressions were used to determine the relationships between the phenological parameters and functional traits. The results showed that bud sprouting occurred from February 16th （DOY： 46.6） to April 8th （DOY： 97.6）. The leaf spanning occurred from March 13th （DOY： 71.6） to April 21st （DOY： 110）. Both bud sprouting and leaf spanning time varied significantly among species. Significant positive linear relationships were detected between bud sprouting and leaf spanning time, bud sprouting time and plant height, leaf spanning time and plant height, bud sprouting time and stem tissue density, and leaf spanning time and stem tissue density across the 35 selected species. The results indicate that the spring greening project should be completed before March 10th and that it has a theoretical value in functional ecology.