热带农业工程2025，Vol.49Issue(6)：46-52,7.
不同冠幅蒙古扁桃灌丛的穿透雨特征及其影响因素
Throughfall Characteristics and Influencing Factors of Amygdalus Mongolica Shrubs with Different Canopy Sizes
摘要
Abstract
Canopy rainfall redistribution represents a key driving factor of shrubland ecological evolution in arid areas,crucial for understanding hydrological cycles and water budgets in these ecosystems.Through field observations of Amygdalus mongolica shrubs with varying canopy sizes,this study analyzes throughfall characteristics and main influencing factors while quantifying effective precipitation reaching the soil and its spatial distribution.The results showed that:(1)Smaller-canopy shrubs exhibit greater throughfall(66.87%-72.08%of gross rainfall),with significant differences across rainfall gradients(P＜0.05);A.mongolica almonds demonstrates lower throughfall than other arid-region plants;(2)Throughfall correlates strongly with rainfall characteristics(rainfall amount and duration)but not intensity,showing negative correlation with leaf area index,positive correlation with canopy thickness,and significantly positive correlation with mean atmospheric pressure(P＜0.05);(3)Rainfall thresholds for throughfall and stemflow initiation are 0.53 mm and 0.72 mm,respectively,indicating minimal soil moisture replenishment from events＜0.80 mm.These results advance understanding of vegetation impacts on local hydrology and support modeling rainfall redistribution to enhance water-use efficiency in arid regions.关键词
蒙古扁桃/冠层截留损失/穿透雨/树干茎流/降雨特征Key words
Amygdalus mongolica/canopy interception loss/throughfall/stemflow/rainfall characteristics分类
农业科技引用本文复制引用
郭立明,李帆,杨健,刘超,曹晔,丁万全,徐志鹏..不同冠幅蒙古扁桃灌丛的穿透雨特征及其影响因素[J].热带农业工程,2025,49(6):46-52,7.基金项目
宁夏自然科学基金项目(No.2023AAC02020) （No.2023AAC02020）
中央引导地方项目(No.2022FRD05001) （No.2022FRD05001）
宁夏林业调查规划院项目"宁夏基于水分平衡条件下碳汇营造林优选植被群调查". （）
