重庆市主城区22种常见绿化树种凋落叶的持水特性

编号 lyqk009656

中文标题 重庆市主城区22种常见绿化树种凋落叶的持水特性

作者 王芳  林敦梅 

作者单位 重庆大学三峡库区生态环境教育部重点实验室 重庆 400044

期刊名称 中国城市林业 

年份 2021 

卷号 19

期号 6

中文摘要 文章以重庆市主城区22个常见绿化树种为研究对象,通过蒸馏水浸泡法测定凋落叶的持水特性;再通过测定不同树种凋落叶的性状,分析其与凋落叶持水特性之间的关系。结果表明:随着浸泡时间的增加,所有树种凋落叶的吸水量呈对数增加;不同树种凋落叶的标准持水力(浸泡1 h)和最大持水力(浸泡24 h)均存在显著差异(P<0.001),其中黄葛树的标准持水力最大(90.5±2.1)%,鸳鸯茉莉的最大持水力最大(268.0±22.5)%,而蚊母树的标准持水力(5.8±0.4)%和最大持水力(21.3±2.3)%均最小;标准持水力和最大持水力均与叶干物质含量呈显著负相关关系,最大持水力还与比叶面积呈显著正相关关系,说明叶的性状可以预测其凋落叶的持水力特性。基于研究结果,在城市绿地中选择种植鸳鸯茉莉、红背桂、金丝桃、栀子花等灌木,以及黄葛树、广玉兰等乔木将更有利于提高城市森林凋落物层的水源涵养能力。研究结果可为提升城市绿地水源涵养功能的树种选择提供参考。

关键词 绿化树种  凋落叶  叶片性状  持水特性  水源涵养 

基金项目 重庆市研究生科研创新项目凋落物分解机制对城市污染河流生态修复的指示作用（CYS19038）

英文标题 Water Holding Capacity of Leaf Litters from 22 Common Greening Tree Species in Chongqing

作者英文名 Wang Fang, Lin Dunmei

单位英文名 Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China

英文摘要 In this study, we measure leaf litter water holding capacity of 22 greening tree species which are widely planted in the core area of Chongqing by using steam distillation method, and also test their leaf traits, in order to analyze the relationships between leaf traits and water holding capacity of leaf litters. The results show that leaf litters' water absorption increases logarithmically with soaking time, and the standard water holding capacity (soaking 1 hour) and maximum water holding capacity (soaking 24 hour) of leaf litters of different tree species differ significantly (P<0.001). Among the 22 species tested, Ficus virens has the highest standard water holding capacity (90.5±2.1)% and Brunfelsia acuminata has the highest maximum water holding capacity (268.0±22.5)%, while Distylium racemosum is the tree species which is lowest in both standard water holding capacity (5.8±0.4)% and maximum water holding capacity (21.3±2.3)%. Standard water holding capacity and maximum water holding capacity are both significantly negatively correlated to leaf dry matter content, and maximum water holding capacity is also significantly positively correlated to specific leaf area. This result suggests that leaf traits can be used to predict the water holding capacity of leaf litters. Based on the results, we recommend B. acuminata, Excoecaria cochinchinensis, Hypericum monogynum, Gardenia jasminoides, F. virens and Magnolia grandiflora as the priority greening tree species in order to increase the litter layer capacity of water conservation in urban forest. This study provides some suggestion for the selection of greening tree species to improve the water conservation function of urban green space.

英文关键词 greening tree species;leaf litter;leaf trait;water holding characteristics;water conservation

起始页码 15

截止页码 20

投稿时间 2021/3/28

作者简介 王芳(1992-),女,硕士,研究方向为植物凋落物生态学。E-mial:823626992@qq.com

通讯作者介绍 林敦梅(1986-),男,博士,副教授,研究方向为植物生态学。E-mail:lindunmei@cqu.edu.cn

E-mail lindunmei@cqu.edu.cn

DOI 10.12169/zgcsly.2021.03.28.0003

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