荒漠区狭叶锦鸡儿灌丛的微气候特征  

Microclimate Characteristics of Caragana stenophylla Shrub Canopy in Desert Region

作　　者：刘哲[1] 梅续芳 张玮[1] 马成仓[1] 李清芳[1] 

机构地区：[1]天津师范大学生命科学学院,天津市动植物抗性重点实验室,天津300387

出　　处：《干旱区研究》2016年第2期308-312,共5页Arid Zone Research

基　　金：国家自然科学基金项目(31570453,31170381)

摘　　要：用手持微气候仪测定了内蒙古高原荒漠区狭叶锦鸡儿(Caragana stenophylla)灌丛内部、灌丛背风面、裸地(对照)的风速、温度、湿度指标,掌握了狭叶锦鸡儿灌丛导致的微气候特征,进而讨论微气候特征对新生苗形成和定居的意义。结果表明:狭叶锦鸡儿灌丛降低了灌丛内部和周围的风速,灌丛背风面的风速降低幅度比灌丛中心更大;灌丛减小了内部及周围的温度波动,使之保持平稳;灌丛提高了内部和周围的湿度,灌丛中心的湿度增加幅度比灌丛背风面更大;灌丛改变微气候的效应随灌丛体积的增大而增强。这些微气候特征有利于新生苗在灌丛内部的定居。In desert region,shrub canopy has an important influence on the survival and growth of shrub seedlings. Caragana stenophylla is one of the most common shrub species on the Inner Mongolian Plateau. In order to understand the microclimate characteristics caused by C. stenophylla shrubs,we investigated the temperature,humidity and wind speed within C. stenophylla shrub canopies and on the leeward side of shrubs and bare land（ contrast）. The results showed that C. stenophylla shrubs could reduce the wind speed and temperature fluctuation,but increase the humidity within C. stenophylla shrub canopies and on the leeward side of shrubs. The reduction of wind speed was greater on the leeward side of shrubs than within shrub canopies,while the increase of humidity was greater within shrub canopies than that on the leeward side of shrubs. The effects of C. stenophylla shrubs on microclimate characteristics enhanced as the size of C. stenophylla shrubs increased. These microclimate characteristics in shrubs were beneficial to the new shrub seedlings growing inside shrub canopies.

关 键 词：狭叶锦鸡儿(Caragana stenophylla) 灌丛 微气候 温度 湿度 风速 阿拉善左旗 

分 类 号：S793.9[农业科学—林木遗传育种]