田间条件下毛白杨无性系光合和蒸腾特性研究  

STUDY ON THE PHOTOSYNTHESIS AND TRANSPIRATION OF POPULUS TOMENTOSA IN FIELD

作　　者：符军 符毓秦 刘玉媛 高建社 

机构地区：[1]陕西省林业科学研究所

出　　处：《陕西林业科技》1995年第3期1-6,10,共7页Shaanxi Forest Science and Technology

摘　　要：测定了８个毛白杨无性系净光合速率、蒸腾速率、蒸腾效率和气孔阻力等生理指标，反映出它们抗旱性上的差异。毛白杨无性系净光合速率和蒸腾速率与其叶片形态特征和解剖特征有着密切关系。毛白杨各无性系单位面积日同化量之间的差异，来源于它们在１２：００ｐｍ─２：００ｐｍ时，对逆境忍受能力的差异和时至４：００ｐｍ时叶细胞膨压恢复能力的差异。短时间内测定的净光合速率不能作为预测树木生长量大小的直接指标。According to photosynthetic rate transpiration rate,transpiration efficiency and stomatic resistance of 8 clones of Populus tomentosa,the rought resistant is made clear.The paper reports that photosynthetic rate and transpiration rate of the clones of Populus tomentosa relate to the anatomic characteristics of leaves closely.The difference of assimilation rate is due to the difference of sufferance ability in adverse circumstances during 12:00pm-2:00pm and restoration ability of expansio-pressure of leaf cells. Photosynthetic rate that is tested in a short time cannot be used to foretell the growth quantity.

关 键 词：毛白杨 无性系 光合速率 蒸腾速率 

分 类 号：S792.117[农业科学—林木遗传育种]