摘要
通过对新疆杨、速生杨沙地造林树种光合特性比较研究发现:(1)新疆杨、速生杨是高光能利用效率树种;新疆杨净光合速率平均值高于速生杨(中林-46);(2)新疆杨树种蒸腾速率受气温、空气相对湿度及水汽压的直接影响而变化的幅度大于速生杨(中林-46);(3)新疆杨水分利用效率高于速生杨(中林-46);(4)新疆杨和速生杨树种的光能利用效率,与水分竞争能力之间具有互补性,反映出这2种杨树对干旱环境的适应策略较强;(5)速生杨气孔导度均值大于新疆杨气孔导度,但是,新疆杨气孔导度值变化幅度较大。
Comparison tests of photosynthetic characteristics of Populus boUeana fast growing poplar（zhonglin-46） were conducted. The finding shows： （ 1 ） Populus bolleana and fast growing poplar（zhonglin-46） are the high efficiency of solar energy utilization; the mean net photosynthetic rate （P,） ofPopulus bolleana is higher than that of fast growing poplar（zhong- lin-46）, （2） the varied range of transpiration rate of Populus bolleana directly affected by temperature, relative humidity and water vapor pressure is bigger than that of fast growing poplar（ zhonglin-46）, （3）the water use efficiency of Populus bolleana is higher than that of fast growing poplar（ zhonglin-46）, （4）light use efficiency （LUE） and water competitive capacity（WCC） between the tree species of Populus bolleana and fast growing poplar are complimentary, which shows that drought-resistanee of these 2 species poplar trees to is stronger, and （5） the mean stomatal conductance （G.） of fast growing poplar is higher than that of Populus bolleana of which the varied range is great.
出处
《防护林科技》
2008年第3期25-28,共4页
Protection Forest Science and Technology
关键词
新疆杨
速生杨
光合特性
Populus bolleana
fast growing poplar（zhonglin-46）
photosynthetic characteristics
