%0 Journal Article
%T Digital modeling of light distribution within the crop canopy in jujube-wheat interplanting system<br>枣麦间作系统中光能在作物群体内分布的数值模拟
%A ZHANG Jixiang
%A WEI Qinping
%A LIU Kechang
%A LU Peiling
%A <br>张继祥
%A 魏钦平
%A 刘克长
%A 陆佩玲
%J 应用生态学报
%D 2003
%I 
%X On the basis of field observation and with the principles and methods of agricultural meteorology, the daily variations of the shadow width of jujube tree belts and the relative light intensity were analyzed in the jujube-wheat interplanting system, and the characteristics of vertical distribution of the light within the wheat canopy inside and outside the shadow were studied. The sunshine vertical distribution curves in the wheat canopy inside and outside the shadow were simulated by mathematical methods. The results showed that the shadow area of the south-north planting jujube tree belts was fairly wider, but the relative light illuminance was larger in early morning and late afternoon than at about noon. Although the sunshine vertical distribution in the wheat canopy inside and outside the shadow was obviously different, they both observed the decreasing law for Gauss Curve.
%K Shadow width
%K Relative light illuminance
%K Leaf area density function
%K Light wakening coefficient<br>遮荫宽度
%K 相对光照强度
%K 叶面积密度函数
%K 消光系数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=58ABD2BEFEBF2BEC&yid=D43C4A19B2EE3C0A&vid=F3583C8E78166B9E&iid=B31275AF3241DB2D&sid=D4A72ABDCEDCE1BD&eid=29C36F017AD88B64&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=3&reference_num=11