| 不同类型园林植物群落冠层的截留能力研究 |
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| 引用本文： | 庞维华,孙雅婕,刘建军.不同类型园林植物群落冠层的截留能力研究[J].水土保持通报,2022,42(4):49-55. |
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| 作者姓名： | 庞维华 孙雅婕 刘建军 |
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| 作者单位： | 西北农林科技大学 风景园林艺术学院, 陕西 杨凌 712100 |
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| 基金项目： | “十二五”国家科技支撑计划项目“困难立地植被恢复技术研究与示范”（2015BAD07B02） |
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| 摘 要： | 目的] 对不同类型园林植物群落冠层截留能力进行研究，为选择冠层截留效果最优的植物群落配置提供理论依据。方法] 选取7种不同结构的植物群落采用实测法分别测定林外降雨量、林下穿透雨量、树干茎流量，再利用水量平衡法求得冠层截留量，进行分析对比。结果] 单层针阔混交林的冠层截留率达到了49.86%，截留效果最好。单层阔叶灌木截留率为23.66%，截留效果最差。林外降雨量与林下穿透雨量、树干茎流量、冠层截留量呈线性正相关，拟合系数R2均在0.9左右。对冠层特性与冠层截留能力进行相关性分析的结果为，叶面积指数、郁闭度、冠层厚度、绿化覆盖面积和三维绿量与穿透率呈负相关，与截留率呈正相关。结论] 园林植物群落冠层对雨水有一定的截留能力，且不同类型的群落有一定的差异性，单层阔叶灌木的截留率最低，单层针阔混交林的截留率最高;叶面积指数与郁闭度越高、冠层越厚、绿化覆盖面积与三维绿量越大，园林植物群落的冠层截留能力越好。
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| 关 键 词： | 冠层截留 叶面积指数 植物群落结构 树干茎流 |
| 收稿时间： | 2021/12/16 0:00:00 |
| 修稿时间： | 2022/3/11 0:00:00 |
Canopy Interception Ability of Different Types of Garden Plant Communities |
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| Pang Weihu,Sun Yajie,Liu Jianjun.Canopy Interception Ability of Different Types of Garden Plant Communities[J].Bulletin of Soil and Water Conservation,2022,42(4):49-55. |
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| Authors: | Pang Weihu Sun Yajie Liu Jianjun |
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| Institution: | College of Landscape Architecture, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: | Objective] The canopy interception ability of different types of garden plant communities was determined in order to provide a theoretical basis for selecting the plant community with the best canopy interception effect.Methods] We selected seven plant communities with different structures, and measured actual throughfall and stem flow. We used the water balance method to obtain canopy interception.Results] The greatest canopy interception rate (49.86%) was observed for a single-layer coniferous and broad-leaved mixed forest. The lowest interception rate (23.66%) was observed for a single-layer broad-leaved shrub canopy. The throughfall, stem flow, and the canopy interception were linearly and positively correlated with rainfall amount (R2 of about 0.9). Leaf area index, canopy closure, canopy thickness, green coverage area, and three-dimensional green quantity were negatively correlated with penetration rate, and positively correlated with interception rate.Conclusion] The canopy of a garden plant community has the ability to retain rainwater, and different types of communities have different abilities. The interception rate of the single-layer broadleaved shrub canopy was the lowest, and that of the single-layer coniferous and broadleaved mixed forest was the greatest. Greater leaf area index and canopy density, thicker canopy, larger green cover area and three-dimensional green quantity all lead to greater canopy interception capacity of a garden plant community. |
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| Keywords: | canopy interception leaf area index plant community structure stem flow |
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