遮阴处理条件下艾纳香的光合特性研究  

Photosynthetic Characteristics of Blumea balsamifera Under the Condition of Shading Treatment

作　　者：陈威晓[1] 王玉梅[2] 陈蕊[2] 

机构地区：[1]海南大学,海南海口570203 [2]海南省环境科学研究院,海南海口570206

出　　处：《安徽农业科学》2012年第29期14237-14239,共3页Journal of Anhui Agricultural Sciences

摘　　要：[目的]研究遮阴处理条件下艾纳香的光合特性。[方法]在盆栽条件下,以1层(7%～10%)、2层(15%～20%)、4层(30%～40%)3种不同遮阴处理的艾纳香叶片为对象,用Li-6400型便携式光合作用测定系统对其叶片光合作用日变化、光响应曲线进行比较测定,阐述光合作用对艾纳香光浓度的响应特征。[结果]1层遮阴艾纳香叶片的光合速率(Pn)日变化呈双峰曲线型,峰值在10:30和13:30,"谷底"出现在12:30,有明显的"午休"现象;2层遮阴和4层遮阴的艾纳香光合作用微弱,整个白天一直在0值附近上下波动。艾纳香药用植物光合速率值大小顺序为1层遮阴艾纳香>2层遮阴艾纳香>4层遮阴艾纳香;光合速率(Pn)响应的大小顺序为1层遮阴艾纳香>2层遮阴艾纳香>4层遮阴艾纳香。[结论]1层遮阴艾纳香的光合速率值明显高于其他2种光照处理,表现出明显的高光合效率特性;叶片对不同强度光合有效辐射的光响应特征有明显差异。[Objective] To study the photosynthetic characteristics of Blumea balsamifera（Linn.） DC under the condition of shading treatment.[Method] Under pot culture,B.balsamifera leaves with 1（7%-10%）,2（15%-20%）,and 4（30%-40%） layers of shading were studied.Li-6400 portable photosynthesis system was used to detect and compare the photosynthesis daily change of leaves,and the response curve.Photosynthetic characteristics of photosynthesis to the light concentration of B.balsamifera were studied.[Result] Daily change of photosynthetic rate（Pn） in one layer shading treatment showed double-peak curve;while the photosynthesis in 2-layer and 4-layer treatment were relatively weak,and fluctuated around 0 in the whole daytime.Photosynthetic rates of B.balsamifera in three treatments were in the order of 1-layer shading 〉 2-layer shading 〉 4-layer shading.The responses of photosynthetic rate（Pn） were in the order of 1-layer shading 〉 2-layer shading 〉 4-layer shading.[Conclusion] Photosynthetic rate of1-layer shading of B.balsamifera was significantly higher than other 2 shading treatments,showing significant characteristics of high photosynthetic rate.Leaves had different photoresponse characteristics to different photosynthetic active radiations.

关 键 词：艾纳香(Blumea balsamifera(Linn.) DC) 光照强度 光合作用 光合生理特性 

分 类 号：S567.239[农业科学—中草药栽培]