冬春季不同遮荫水平对香蕉假植苗单株生物量的影响  

Effects of Shading Levels on Biomass of Banana Seedlings in Winter and Spring

作　　者：谢平[1] 左清凡[1] 

机构地区：[1]湛江海洋大学农学院,广东湛江524088

出　　处：《中国农业气象》2001年第2期6-11,共6页Chinese Journal of Agrometeorology

摘　　要：将从培养瓶中移出的冬季 ( 12～ 1月 )或春季 ( 3～ 4月 )的香蕉组培苗置于大棚内 ,并在 4种遮荫水平下进行假植炼苗 ,相对光强分别为 10 0 % ( S10 0 ) ,33% ( S33) ,10 % ( S10 ) ,3( S3)的光照条件。结果表明 ,不同光照强度下 ,单株香蕉苗的鲜茎重、鲜叶重、鲜根重、总鲜重、干茎重、干叶重、干根重和总干重都存在显著差异 ,但不同的生物量性状对光照强度的反应程度不同。冬季或春季遮荫均不利于单株香蕉苗的物质生产 ,且随遮荫程度的加重 ,影响愈大。同时遮荫还改变物质运输分配到各器官的比例。此外 ,春季与冬季相比 ,春季地上部各器官物质积累大于冬季 。With four shading levels in winter or spring, banana seedlings obtained by tissue culture were planted in the big shed. The four light treatments were respectively 100%(S100), 33%(S33), 10%(S10) and 3%(S3). Results showed that the effects of banana seedlings at different light intensities were significantly different in fresh stem weight, fresh leaf weight, fresh root weight, total fresh weight, dry stem weight, dry leaf weight, dry root weight and total dry weight. The response of different biomass characters to light intensity was different. Shading in winter or spring was all not propitious to the substance production of banana seedling, and the more the shading was, the more the influence was. The proportion of photosynthate distributed to organs was also changed with light intensity. Moreover, the substance accumulated in aboveground organs in spring was more than that in winter, and the substance accumulated in root in winter was more than that in spring.

关 键 词：香蕉 光照强度 春季 冬季 遮荫水平 假植苗 单株生物量 

分 类 号：S161.1[农业科学—农业气象学]