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关中地区常绿阔叶植物叶片截留特征
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(xibeinonglinkejidaxue fengjingyuanlinyishuxueyuan, shanxi yangling 712100)

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Characteristics of Leaf Rainfall Interception of Evergreen Broad-Leaved Plants in the Guanzhong of Shaanxi
SUN Yajie, LIU Jianjun

(college of landscape architecture and arts, northwest a&f university, yangling, shaanxi 712100, china)

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为探究关中地区不同常绿阔叶植物的叶片截留能力,以关中地区16种常绿阔叶植物的叶片为试验对象,采用浸泡法测定植物叶片的表面截留量和内部截留量,探究了叶片单叶截留能力,以及与性状因子之间的关系。结果表明:叶片形态因子(叶面积、叶厚、叶长、叶宽)及叶片功能因子(LDMC,SLA)对叶片截留影响较大,叶片形态因子、SLA与截留能力呈正相关,LDMC与叶片截留能力呈负相关。与功能因子相比,叶片形态因子影响更大,与叶片截留量之间呈复合函数关系。根据叶片性状因子及截留能力综合分析,得出叶片形态较大、LDMC较小、SLA中等水平的植物截留能力最佳。研究可为园林植物种类的选取提供参考,对利用园林植物的截留作用来缓解城市中水资源问题,促进海绵城市建设有一定价值。
This research outcome can provide guidance for the selection of garden planting, and will assist to alleviate urban water shortages and promote the construction of sponge cities. The aim of this study is to investigate the leaf interception capacities(LIC)of 16 evergreen broad-leaved plants in the Guanzhong of Shaanxi. The leaves of the evergreen broad-leaved plants were collected and analyzed based on the proposed method by submerging leaves to obtain the surface water storage amount and the maximum water storage amount that can be used to measure the LIC of single leave and explore its relationships with the factors of characteristics. The results show that leaf morphological factors(leaf area, leaf thickness, leaf length, and leaf width)and leaf functional factors such as leaf dry matter content(LDMC)and specific leaf weight(SLA)have the great influence on LIC. Leaf morphological factors and SLA are positively correlated with LIC, while LDMC is negatively correlated with LIC. Compared with the functional factors, leaf morphological factors have the greater effect, and the relationship between leaf morphological factors and LIC can be described by a composition function. According to this study, it is concluded that the plant species with larger leaf area, smaller LDMC and medium SLA have the highest LIC.
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