黄土高塬沟壑区苹果林冠截留特征  

Canopy Interception Characteristics of Apple Trees in Gully Region of Loess Plateau

作　　者：杨文强[1] 王艳萍[1] 张青峰[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《水土保持通报》2013年第2期93-96,共4页Bulletin of Soil and Water Conservation

基　　金：中国科学院知识创新工程项目"长武县水资源状况;降水集蓄模式与旱作农田生产力适度开发技术"(KSCX-YW-09-07)

摘　　要：以黄土高塬沟壑区的典型代表长武塬为研究区,基于对45场降雨的实测数据,分析了苹果林的林冠截留特征,量化了林冠对降雨的分配比例。结果表明,17年生苹果林穿透雨量、树干径流量、林冠截留量分别占大气降雨量的75%～97%,0.2%～1.6%,2%～25%。穿透雨量与降雨量呈凹形抛物线关系,树干径流量与降雨量的关系可近似用直线方程表达,由三次多项式表达的林冠截留量与降雨量关系与实测值的拟合程度最高。Changwuyuan as a representative landform in the gully region of Loess Plateau was selected as the study area of this study. We analyzed canopy interception characteristics of apple trees and quantified canopy allocation of rainfall based on field observations during 45 rainfall events. The results showed that throughfall, stemflow and canopy interception accounted for 75-97%, 0.2%-1.6%, and 2%-25% of the total rainfall, respectively. The relationship between throughfall and total rainfall could be described roughly by a parabolic curve with upward opening and that between stemflow and total rainfall by a linear equation. The relationship between canopy interception and total rainfall was cubic polynomial, which had the highest fitting degree with the observed values.

关 键 词：苹果林 林冠截留 穿透雨量 树干径流量 

分 类 号：S715.2[农业科学—林学]