长江中下游外滩人工林胁地效应及其对间作油菜产量的影响  

ShadeEffect ofP1antation onBeach1andofMidd1e and LowerrReaches of the Yangtze River and ItsInfluence upon Yield of Intercrop

作　　者：姚永康[1] 刘建栋[1] 康忠铭 孙启祥[1] 

机构地区：[1]安徽农业大学

出　　处：《安徽农业大学学报》1994年第S1期27-32,共6页Journal of Anhui Agricultural University

摘　　要：利用ＬＩ─１８００便携式分光光谱仪和ＬＩ─１８８Ｂ辐射量子照度仪对长江中下游外滩人工林辐射状况进行系统研究，结果表明，外滩胁地效应随树龄增长而增大，杨树展叶前后，胁地效应有一个较明显的由弱转强的变化，其特征是胁地面积明显增大，胁地光强迅速减弱，因胁地效应造成油菜产量下降的年递减率约为８％左右。采用整枝、改种阴生植物以及隔行砍伐杨树的方法可以改善人工林行间的光照条件使行间间种得以延续。The author used the LI一1800 Spectromete and the LI一188BQuantum photometer to measurethe volume of solur radiatioi1 in the poplar plantalioii near Yaiigtze River.The results show thatthe shade effect of tree is strengthened while the age of poplar tree adds.The character is that theshade area is expanded ai*the volume of solar radiation is reduced rapidly,Because the shade effect influences the growth of intercrop,The annual yield of rape reduced by 8%.Take some measure may in1prove the condition of solar radiation and let intercrop continue.

关 键 词：林油间作 胁地效应 辐照度 

分 类 号：S753.536[农业科学—森林经理学]