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园艺学报 ›› 2003, Vol. 30 ›› Issue (6): 742-744.

• 研究报告 • 上一篇    下一篇

夏季温室三药槟榔光合特性及不完全遮荫的影响

赵世伟1 刘东焕2 张佐双1 高荣孚2 刘玉军2   

  1. ( 1北京市植物园,北京100093; 2北京林业大学生物科学与技术学院,北京100083)
  • 收稿日期:2002-11-04 修回日期:2003-03-19 出版日期:2003-12-25 发布日期:2003-12-25

Photosynthetic Characteristics of Areca triandra Roxb.in Greenhouse in Summ er and the Effects of Partial Shading on Its Photosynthesis

Zhao Shiwei , Liu Donghuan2, Zhang Zuoshuang ,Gao rongfu ,and Liu Yujun2   

  1. ( Beijing Botanical Garden,Beijing 100093, Ch/na; Biological Science and Technological College of Beifing Forestry UniversityBei~ g 100083,Ch/na)
  • Received:2002-11-04 Revised:2003-03-19 Online:2003-12-25 Published:2003-12-25

摘要: 以热带观叶植物三药槟榔为材料,研究其光合特性以及夏季温室不完全遮荫的影响。结果表明:夏季温室内三药槟榔光合作用饱和有效辐射在200 300,mnol·mI2·S 之间,光合作用最适叶温在25℃左右。温室遮荫后的日均光合有效辐射比遮荫前降低了55%,平均气温和叶温降低3~4~C。遮荫前的强光高温下,三药槟榔有明显的光抑制现象,初始荧光(F0)明显上升。不完全遮荫措施使光抑制现象消失,F0没有明显上升,对日均光合速率影响也较小(日平均净光合速率降低12%)。对三药槟榔的生长有利。

关键词: 三药槟榔, 温室, 遮荫, 光合特性, 叶绿素荧光

Abstract: Gas exchan ge an d chlorophyll fluorescence were used to explore the photosynthesis of Areca triandra Roxb. in greenhouse before and after partial shading. It showed that light saturation photon flow density of Areca triandra Roxb. Was about 200—300~tmol·m一 ·s一 and optimal leaf temperature Was about 25℃ .The average daily photos yn thetically active solar irradian ce decreased by about 55% , while for the air an d leaf temperaturea decrease of about 3—4℃ were observed after shading compared with before shading.Distinct photoinh ibition of Areca triandra R0xb. Was observed before shading, however, there Was no obvious photoinhibition occurred after shading. The average daily net photosyn thetic rate of Areca triandra R0xb. Was only reduced by about 12% after shading. All these results indicated that partial shading Was be nefit for the growth of Areca triandra R0xb. in greenh ouse in summer.

Key words: Areca triandra R0xb., Greenh ouse, Partial shading, Photosyn th esis, Chlorophyll fluorescence