模拟酸雨对萱草光合特性的影响  

Effect of Simulated Acid Rain on Photosynthetic Characteristics in Hemerocallis

作　　者：魏湘萍[1] 于晓英[1] 熊旋[1] 侯志勇[1] 谢荣[1] 洪晓晓[1] 

机构地区：[1]湖南农业大学园艺园林学院,湖南长沙410128

出　　处：《北方园艺》2009年第6期175-177,共3页Northern Horticulture

基　　金：湖南省教育厅资助项目(04C286)

摘　　要：采用人工喷洒的方法,研究了不同pH值(2.0、3.5、5.0、6.5)的模拟酸雨对6个萱草属光合特性的影响。用LI-6400型便携式光合作用测定系统对萱草的光合特性进行测定,在研究光合指标与抗酸性关系的基础上,采用隶属函数法对6种萱草属进行综合评价。结果表明:与对照相比,pH 3.5酸雨降低了萱草的光补偿点、光饱和点,在pH 3.5～2.0强酸雨胁迫下,6个萱草属植物材料受伤严重,但材料之间有一定差异,它们的受伤程度依次为:野生重瓣萱草<玫瑰红萱草<黄花菜<大花萱草<金娃娃萱草<折叶萱草。Through the artificial sprinkling method, impact of simulated acid rain with various pH values （2. 0,3. 5,5. 0,6. 5） on photosynthetic system was studied. The photosynthetic characteristics of live mature leaves in HernerocaUis plants were determined with the LI-6400 portable photosynthesis system, on the basis of the relationship between photosynthesis and acid-fast indicator, the comprehensive evaluation of the six Hemerocallis handled by subordinate function method. The results showed that,,The light compensation point and saturation point of HemerocaUis fell down under pH 3. 5. With the strong acid rain stress in pH 3. 5-2. 0, six Hemerocallis species materials were seriously injured, but there were differences between the materials, the extent of their injuries were Hernerocallis fulvavar Florepleno%HemerocaUis f ulva var. rosea〈 Hemerocallis citrine 〈 Hemerocallis h ybrida 〈 Hemerocallis fulva〈 Hemerocallis plicata Stapf.

关 键 词：萱草 模拟酸雨 光合特性 净光合速率 蒸腾速率 

分 类 号：S682.19[农业科学—观赏园艺]