安徽农业大学学报2011，Vol.38Issue(5)：713-717,5.DOI:34-1162/s.20110829.1432.025
3个杨树无性系蒸腾耗水特性研究
Transpiration characteristics of three poplar tree clones
摘要
Abstract
The characteristics of transpiration of 3 poplar clones which are NL 895,1-69 and WL1 were measured by LI-6400 portable photosynthesis system in May, July, August and October. The result indicated that the daily variation and annual variation of daily average transpiration rates of the 3 tested poplar tree clones were approximately the same, displaying single peak in May and October, and double-peak in July and August. The maximum and minimum values of their transpiration rates appeared in July and May. The monthly order of the daily average transpiration rates in each month were as follows: 1-69 (1.87, 7.61, 2.52 and 3.34 mmol·m-2·s-1> NL895 (1.71, 5.57, 1.79 and 2.71 mmol·m-2·s-1>WL1( 1.13, 3.55, 1.4 and 1.96 mmol·m-2·S-1. Correlation coefficient and direct path coefficient showed that all clones' transpiration rates had different degree correlation with environmental factors. The factors which affect transpiration rates are of the following order: Ta(air temperature)>RH(relative humidity)>Gs(stomatal conductance)>PAR(photosynthetic active radiation), in exception to NL895 and I-69 varieties in October, which is in the order of Gs>Ta>RH>PAR . The daily total transpiration quantities for single plant of three clone standard woods were listed as: NL 895,42 020.84g; I-69 , 61 866.03 g; WL1 , 23 346.43 g.关键词
杨树无性系/蒸腾速率/蒸腾量/环境因子Key words
poplar tree clone/ transpiration rate/ transpiration quantity/ environmental factors分类
农业科技引用本文复制引用
张栋,刘桂华,项艳,闫年,赵德斌,赵海燕..3个杨树无性系蒸腾耗水特性研究[J].安徽农业大学学报,2011,38(5):713-717,5.基金项目
国家科技支撑计划子课题(2009BAD6B06-1)和沿淮行蓄洪区防洪避灾林关键技术集成与推广(科技部农业科技成果转化资金项目)共同资助. （2009BAD6B06-1）
