河南新乡8种园林树种叶片持水性能及其与叶片性状的相关性分析
2025-08-21于梓浩刘涵璐史鑫宇杨荣昊杨迪源周瑞金
中图分类号 S688 文献标识码A 文章编号 1007-7731(2025)15-0042-05
DOI号10.16377/j.cnki.issn1007-7731.2025.15.011
Analysis of leaf water holding capacity and its correlation with leaf traits of 8 garden tree species in Xinxiang,Henan Province
YU Zihao1LIU Hanlu1SHI Xinyu1YANG Ronghao1YANG Diyuan1ZHOU Ruijin1,2 ('College of Horticulture and Landscape Architecture, Henan Institute of Science and Technology, Xinxiang 453003, China; (20 2 Xinxiang Key Laboratory of Fruit Tree Germplasm Resources and Genetic Breeding,Xinxiang 453003, China)
AbstractTo screen tree species with strong water holding capacity,the indoor extraction method wasadopted to analyzethe leaf characteristics such as leaf length,leaf water holdingrate,water absorption rate,water lossrate and waterlossrateof8gardentree species including Cercis chinensis.The water retentionrateand immersion timeof the leaves,the waterloss rateand waterlosstime,the water absorptionrateand immersion timeof the leaves,and the water lossrateand waterloss time werefunctively fittdtoanalyzethecorrelation between theleafcharacteristicsand the water retention performance.The results showed that,(1) the maxium leaf water holding rates ofthe8garden tree species,from high to low,were as follows: Diospyros lotus (346.27%)gt;Fraxinus chinensis (345.23%)gt; Rosa chinensis (314.87% )gt;Cercischinensis (282.13% )gt;Chaenomeles speciosa (229.47%)gt;Photinia serratifolia (198.60%)gt;Buxus sinica var. parvifolia (179.20% )gt;Buxusmegistophylla (150.27% ); the maxium water loss rates of leaves,from high to low,are as follows:Diospyros lotus (56.49% ) gt; Photiniaserratifolia (55.86% ) gt; Chaenomeles speciosa( 52.77% ) gt; Rosa chinensis (52.56% ) gt; Cercis chinensis (49.76% ) gt; Buxus sinica var. parvifolia (49.34% ) gt; Fraxinus chinensis (45.60%)gt;Buxus (204 megistophylla (41.73%) ).(2)With the increase of soaking time,the water holding rate and water loss rate of the leaves of the8 garden treespecies showed alogarithmic function relationship,while the water absorptionrate and waterloss rate showed a power function relationship.(3)The maximum water holding capacityof leaves was closely related to the specific leaf area.Inconclusion,the waterholding capacityof Diospyros lotus,Fraxinus chinensis and Rosa chinensis was relativelygood,andtheyhadastrongabilitytoconserve watersources.Theresearchresultsprovideareferenceforthe selection of tree species to optimize the water conservation function of urban green spaces.
Keywords garden tree species; leaf; water holding capacity; conserve water sources
城市园林绿化具有涵养水源、保持水土、防风固沙以及生态修复等功能,是城市园林建设的重要组成部分。干旱灾害在一定程度上影响了农业生产、生态环境。维持树木正常生长需要消耗大量水资源,随着城市绿化率的提高,城市绿化用水需求持续增加。植物对水分的需求与其形态特征、生长状况、生理变化以及所处环境条件等存在密切联系。叶片是植物与外界环境开展物质、能量交互的关键器官,其含水量体现了植物对水分环境的适应能力[2-3]。因此,筛选保水能力强且需水量少的园林绿化树种对于提升城市绿化水平具有重要意义。
张惠云等采用室内浸泡等方法探究了勾儿茶等20种常见灌木树种叶片形态与持水的关系,结果表明,叶片最大持水率是自然持水率的 2.59~ 5.34倍,持水量随浸水时间对数增加,持水速率随吸水时间幂函数降低, 0.25h 时勾儿茶吸水速率最大、刺鼠李最小,构树叶片持水能力较强,川陕花椒较弱。王丁等5研究发现,随着干旱胁迫强度的增加,6种树种在不同生长时期的叶片水势均呈下降趋势,以生长旺期叶片水势的下降幅度最大。刘海涛等对比分析了青海共和盆地4个林龄乌柳的水分生理特征及叶片性状参数,发现4年生乌柳的水分利用效率较高。
本研究以河南科技学院(河南新乡)校园绿地内的紫荆(Cercischinensis)等8种园林树种叶片为研究对象,采用室内浸提的方法,对各树种叶片的持水性能和失水性能进行比较,筛选出持水能力相对较强的树种,为其在城市绿地中的应用提供参考。……
