林带冬季相结构因子对透风系数影响规律分析  

Impact of winter shelterbelt structure factors upon the ventilated coefficient

作　　者：王志刚[1] 刘芳[1] 辛智鸣[1] 郝玉光[1] 陈海玲[1] 

机构地区：[1]中国林业科学研究院沙漠林业实验中心,磴口015200

出　　处：《干旱区资源与环境》2013年第4期193-197,共5页Journal of Arid Land Resources and Environment

基　　金：中央级公益性科研院所基本科研业务专项(CAFYBB2011005-6)资助

摘　　要：为解决林带冬季相结构过于稀疏、透风系数过大的问题,文中引证分析了林带冬季相结构因子(树木形体尺度、林带线性密度、行数、宽度)、林带结构参数(疏透度、立木疏透度、林带地上生物体积密度)与透风系数的关系;总结了林带冬季相结构因子对透风系数的影响规律。从林带设计原理出发,归纳了通过调节结构因子获得较小透风系数的方法:1)增大树木的形体尺度;2)增大林带的线性密度;3)在线性密度一定时,尽可能把有限的栽植点(或苗木)安排在较少的栽植行内;4)在线性密度、行数一定时,尽可能减小林带宽度。其中林带行数和宽度对透风系数影响较小,简化计算时可忽略不计。这为林带结构管理提供了清晰的认识和简便的方法。In order to solve the problems that the structure of winter shelterbelt phase is too sparse and ventilated coefficient is too great,we cited relations among structure factors of winter shelterbelt phase（shape scale of trees,linear density of shelterbelt,shelterbelt rows,shelterbelt width）,shelterbelt structure parameters（transparence degree,transparence degree of standing tree,density of biomass volume of shelterbelt）and ventilated coefficient.Ventilated coefficient influenced by structure factors of winter shelterbelt phase were summarized.Based on the design principle of shelterbelt,Methods of acquiring small ventilated coefficient by regulating structure factors were induced：（1）Enlarging shape scale of trees;（2）Enlarging linear density of shelterbelt;（3）In the linear density of shelterbelt under the unchanged condition,fewer planting rows are arranged by limited planting points（or seedling）possibly;（4）In the linear density of shelterbelt and rows under the unchanged condition,decrease width of shelterbelt possibly.Because the rows and width of shelterbelt have a small influence on ventilated coefficient,they can be neglected in case of simple calculation.This research provide clear understanding and simple methods for structure supervision of shelterbelt.

关 键 词：农田防护林 透风系数 线性密度 行数 宽度 

分 类 号：S727.2[农业科学—林木遗传育种]