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当前位置: 首页 > 文章 > 2种行道树光合特性研究 现代农业科技 2017 (17) 141-143
Position: Home > Articles > Study on Photosynthetic Characteristics of Two Street Trees Modern Agricultural Science and Technology 2017 (17) 141-143

2种行道树光合特性研究

作  者：
胡勇;宣文良;王希春
单  位：
安徽农业大学动物科技学院;安徽省利辛县程家集镇农林水综合服务站
关键词：
行道树;广玉兰;二乔玉兰;光合特性
摘  要：
本文对广玉兰、二乔玉兰2种行道树的光合特性进行了测定。结果表明,自然状态下,广玉兰、二乔玉兰光合曲线呈双峰型,发生明显的"午休"现象,但二者光合速率的峰值和谷值有一定差异。广玉兰的谷值较低,为3.07μmol CO_2/(m~2·s);二乔玉兰的谷值相对较高,为5.45μmol CO_2/(m~2·s)。广玉兰和二乔玉兰的光补偿点分别为23.87、17.80μmol CO_2/(m~2·s),而两者的光饱和点为1 500、1 200μmol CO_2/(m~2·s)左右,分别显示了两者对弱光的利用和对强光的适应能力。
译  名：
Study on Photosynthetic Characteristics of Two Street Trees
作  者：
HU Yong;XUAN Wen-liang;WANG Xi-chun;Integrated Service Centres of Chengjiaji Town of Lixin County in Anhui Province;College of Animal Science and Technology ,Anhui Agricultural University;
关键词：
street trees;;Magnolia grandiflom.L;;Magnolia×soulangeana(Lindl.)Soul.-Bod;;photosynthetic characteristics
摘  要：
In this paper,the photosynthetic characteristics in leaves of two evergreen species(Magnolia grandiflom.L and Magnolia×soulangeana(Lindl.)Soul.-Bod.) were determined.The results indicated that under natural conditions,the diurnal variations of net photosynthetic rate of Magnolia grandiflom.L and Magnolia×soulangeana(Lindl.)Soul.-Bod. had a typical midday depression pattern,but the peak and valley two photosynthetic rate value was different,the Magnolia grandiflom.L valley value was low with 3.07 μmol CO_2/(m~2·s),Magnolia×soulangeana(Lindl.) Soul.-Bod Valley value was relatively high with 5.45 μmol CO_2/(m~2·s).The light compensation point of Magnolia grandiflom.L and Magnolia×soulangeana(Lindl.)Soul.-Bod. was23.87 and 17.80 μmol CO_2/(m~2·s),respectively. The light saturation point of the two evergreen species was 1 500 and 1 200 μmol CO_2/(m~2·s),which showed the use to weak light and the adaptability to blaze light.

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