刺槐木质部栓塞与生理生态特性研究  

Robinia Xylem Embolism and Its Ecophysiological Characteristics

作　　者：张丹[1] 张硕新[1] 

机构地区：[1]西北农林科技大学林学院

出　　处：《渭南师范学院学报》2006年第5期43-47,共5页Journal of Weinan Normal University

基　　金：国家自然基金项目(30170766)

摘　　要：在不同的土壤水分含量和不同的测定时间条件下,对刺槐的一系列生理生态指标:净光合速率、气孔导度、蒸腾速率、水势、大气温度、相对湿度、光合有效辐射以及导水率进行测定,探求刺槐木质部发生栓塞的影响因子.研究结果表明:木质部导水率损失在不同的土壤含水量以及不同的测定时间条件下是有显著性差异的;刺槐的导水率损失与净光合速率、气孔导度、水势、蒸腾速率、光合有效辐射、大气温度显著相关.Under the condition of different soil humidity and measuring time, a series of ecophysiological indexes, such as net photosynthetic rate, transpiration rate, stomatal conductance, the flow of water, atmospheric temperature, relative humidity, photosynthetic available radiation, and hydraulic conductivity are measured in order to find the factors which cause robinia xylem embolism. The results show that loss of hydraulic conductivity of robinia xylem embolism is different under the condition of different soil humidity and loss of hydraulic conductivity is related with net photosynthetic rate, transpiration rate, stomatal conductance, the flow of water, atmospheric temperature, relative humidity, photosynthetic available radiation, and hydraulic conductivity.

关 键 词：生理生态指标 木质部栓塞 木质部导水率损失 

分 类 号：S792.26[农业科学—林木遗传育种]