辽西地区5种造林树种苗期光合特性比较研究  

The comparative studies on the photosynthetic characteristics in seedling stage of five kinds of afforestation species in western Liaoning

作　　者：曹颖 

机构地区：[1]辽宁省林业种苗管理总站,辽宁沈阳110036

出　　处：《辽宁林业科技》2016年第4期12-13,25,共3页Liaoning Forestry Science and Technology

摘　　要：以辽西地区山杏、臭椿、刺槐、油松、樟子松实生苗为研究对象,在生长季节测定它们的光合特性。结果表明:山杏的净光合速率日变化曲线为双峰型,而其他树种呈单峰型变化;阔叶树种净光合速率平均值高于针叶树种,臭椿较其他树种具有更高的潜在光合生产能力。各树种蒸腾速率,从高到低排序依次为臭椿>山杏>刺槐>樟子松>油松。5个树种气孔导度与蒸腾速率的日变化曲线具有明显的相关性,气孔导度平均值由高到低排序依次是臭椿>刺槐>樟子松>山杏>油松,表明油松、山杏阻止水分从气孔散失的能力较强,具有优良的抗旱基础。This article chose Prunus sibirica,Ailanthus altissima,Robinia pseudoacacia,Pinus tabulaeformis,P. sylvestris var. mongolica as the research object. These afforestation species have important ecological value in western Liaoning. In the growing season,we determined and studied the photosynthetic characteristics which would be the physiological base of these trees＇ drought resistance. The main results were as follows：The daily variation curve of photosynthetic rate on Armenniaca sibirica was double-peak type,but other species＇ was single-peak type.Compared average photosynthetic rate value of the five species,broadleaf species is higher than the coniferous species. It showed that Ailanthus altissima had higher potential photosynthetic productivity than other species. Compared average transpiration rate value of the five species,The order from high to low was Ailanthus altissima〉Prunus sibirica〉Robinia pseudoacacia〉Pinus sylvestris var. mongolica〉P. tabulaeformis.The daily variation curve of five species＇ stomatal conductance and transpiration rate presented significant relevance.The order of average stomatal conductance value from high to low was Ailanthus altissima〉Robinia pseudoacacia〉Pinus sylvestris var. mongolica〉Prunus sibirica〉P. tabulaeformis.It showed that Pinus tabulaeformis and Prunus sibirica had the stronger ability which prevented water to be lost from stomatal. And they had the excellent foundation of drought resistance.

关 键 词：辽西地区 造林树种 光合特性 

分 类 号：S664.233[农业科学—果树学]