农田防护林网格内光照分布规律  

Light Distribution Law in Farmland Shelterbelt

作　　者：黄守科[1] 冯靖宇 

机构地区：[1]北京林业大学,北京100083 [2]湖南省水利水电勘测设计研究总院

出　　处：《东北林业大学学报》2013年第8期46-51,共6页Journal of Northeast Forestry University

基　　金：国家林业局林业公益性行业科研专项项目(200804008)

摘　　要：为更好的反映农田防护林网格内光照强度的变化规律,以许昌县250 m×400 m的农田防护林为研究对象,对林网内不同时段不同方位的光照强度数据进行了分析研究。研究表明,林带对林网东侧区域光照强度影响范围在(0.3～2.0H)(H为树高);林带对林网西侧区域光照强度最大能影响到(0.3～1.5)H;林带对林网南侧区域光照强度影响范围最大能达到(1.0～1.7)H;林带对林网北侧区域光照强度影响范围在0.5H内。An experiment was conducted to reflect the variation of light intensity inside a 250 m×400 m tarmland shelterbelt in Xuchang County and study the light intensity data in different directions and time of one day. The influence area by light intensity is between 0.3H and 2H （H is the tree height） in east side of shelterbelt, between 0.3H and 1.5H in the west side, between 1. OH and 1.7H in the south side, and less than 0.5H in the north side, respectively.

关 键 词：农田防护林 遮荫 光照强度 

分 类 号：S727.24[农业科学—林木遗传育种]