香樟、枸树主茎水分传导能力分布研究  

A Study of Stem-Conductivity of Cinnammon Camphora (Linn.)Presl and Broussonetia Papyrifera (L.) L'Hert

作　　者：张光先[1] 张凤秀[1] 陈德万[1] 

机构地区：[1]西南农业大学基础科技学院,重庆400716

出　　处：《生物数学学报》2000年第2期194-200,共7页Journal of Biomathematics

摘　　要：本文从植物生长发育的机理发出，从理论推导出植物主茎传导能力与主茎长度、导管长度的关系式，导管越长，样品传导能力越大．香樟主茎长度大于18cm、枸树大于12cm时，传导能力随样品长度线性变化；较短时，传导能力随样品长度的缩短迅速增加，出现短路现象．试验测定了香樟、枸树主茎水分长距离运输的传导能力分布，结果与理论预示的完全一致：表明理论分析是正确可靠的，这一规律具有普遍意义．This paper is based on the growing theory of plants and derives theoretically that the longer the vessel length is, the greater the stem-conductivity is. When the stem is very long, the change between stemconductivlty and stem length is linear, when it is short, the stemconductivlty increase sharply with the decrease of stem length. The water stem-conductivity of contribution of cinnammon and Firiana platanitolia stems are measured in experiment, the results are the same as the theoretical results, it shows that : the theoretical analysls is reliabIe. This principle is generally arcepted.

关 键 词：传导能力 导管长度 植物水分运输 生物数学模型 

分 类 号：Q945.171[生物学—植物学] Q－332