摘要
为探索影响林冠截留量各因素的主次关系,利用灰色系统理论,对重庆市缙云山不同类型天然林地内影响林冠截留量的因素进行了灰关联分析。不同植被类型的林冠截留能力大小依次为:针阔混交林>阔叶林>毛竹林。对于毛竹林,各因素对林冠截留量影响的大小顺序依次为:降雨强度>降雨量>气温>风速>空气湿度;对于针阔混交林,各因素影响大小依次是:降雨量>气温>风速>空气湿度>降雨强度;对于阔叶林,各因素影响大小依次是:降雨强度>降雨量>气温=风速>空气湿度。影响毛竹林、针阔混交林和阔叶林林冠截留量的主要是降雨过程,蒸散过程对针阔混交林林冠截留量起着重要作用。
To probe into the primary and secondary relation of factors influencing canopy interception, based on the grey system theory, a grey correlation analysis on factors influencing canopy interception was made, using the data measured in different forestlands of Jinyun mountain, Chongqing. The results showed that the priority of canopy interception capability of different vegetation types was mixed broadleaf-conifer forest 〉 broadleaved forest 〉 Phyllostachys pubescens forest. For Phyllostachys pubescens forest, the influencing priority of analyzed factors was rainfall intensity 〉 precipatation 〉 temperature 〉 wind velocity 〉 air humidity. For mixed broadleaf-conifer forest, the priority was precipatation 〉 temperature 〉 wind velocity 〉 air humidity 〉 rainfall intensity. For broad-leaved forest, the priority was rainfall intensity 〉 precipatation 〉 temperature = wind velocity 〉 air humidity. The canopy interceptions of Phyllostachys pubescens forest, mixed broadleaf-conifer forest and broad-leaved forest were mainly influenced by the process of rainfall. The process of evapotranspiration was important to the canopy interception of mixed broadleaf-conifer forest.
出处
《中国水土保持科学》
CSCD
2005年第3期69-72,共4页
Science of Soil and Water Conservation
基金
国家重点基础研究发展计划"长江上游环境变化与产水产沙作用机制"(2003CB4152023)
