东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2013年
8期
46-51
,共6页
农田防护林%遮荫%光照强度
農田防護林%遮蔭%光照彊度
농전방호림%차음%광조강도
Farmland shelterbelt%Shading%Light intensity
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。
為更好的反映農田防護林網格內光照彊度的變化規律,以許昌縣250 m×400 m的農田防護林為研究對象,對林網內不同時段不同方位的光照彊度數據進行瞭分析研究。研究錶明,林帶對林網東側區域光照彊度影響範圍在(0.3~2.0H)(H為樹高);林帶對林網西側區域光照彊度最大能影響到(0.3~1.5)H;林帶對林網南側區域光照彊度影響範圍最大能達到(1.0~1.7) H;林帶對林網北側區域光照彊度影響範圍在0.5H內。
위경호적반영농전방호림망격내광조강도적변화규률,이허창현250 m×400 m적농전방호림위연구대상,대림망내불동시단불동방위적광조강도수거진행료분석연구。연구표명,림대대림망동측구역광조강도영향범위재(0.3~2.0H)(H위수고);림대대림망서측구역광조강도최대능영향도(0.3~1.5)H;림대대림망남측구역광조강도영향범위최대능체도(1.0~1.7) H;림대대림망북측구역광조강도영향범위재0.5H내。
An experiment was conducted to reflect the variation of light intensity inside a 250 m ×400 m farmland 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 1.0H and 1.7H in the south side, and less than 0.5H in the north side, respectively.