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林业科学 ›› 1995, Vol. 31 ›› Issue (1): 69-71.

• 研究简报 • 上一篇    下一篇

银杏光合特性的研究

孟庆伟,王春霞,赵世杰,赵兰勇   

  1. 山东农业大学 泰安 271018
  • 收稿日期:1993-07-30 出版日期:1995-01-25 发布日期:1995-01-25

STUDY ON THE CHARACTERISTICS OF PHOTOSYNTHESIS IN GINKGO BILOBA L.

Qingwei Meng,Chunxia Wang,Shijie Zhao,Lanyong Zhao   

  1. shandong Agricultural Universitg Taian 271018
  • Received:1993-07-30 Online:1995-01-25 Published:1995-01-25

关键词: 银杏, 光合特性, 光合"午休"

Abstract:

The results showed that the critical points of light compensation and saturation in Ginkgo seedlings were about 78μmol m-2S-1 and 1050μmol m-2S-1 respectively,which meant that Ginkgo was a light-demanding Plant.CO2 compensation point was 100μl 1-1.It was found that the suitable leaf tem perature for photosynthesis was about 26℃.Under normal cultivation conditions the diurnal change of photosynthetic rate showed a double peak curve. And a obvious midday depression.Stomatal limitatiion was main factor causing mid day depression of photosynthesis, but sometimes nonstomatal limitation was noted.Ecological factors causing stomatal limitation were mainly loW air relative humidity and high vapor pressure difference between the lelaves and air.However,high leaf temperature was muain factor other than stomatal limitation.The measures to alleviate or to decrease the midday depression of photosynthesis were also discussed

Key words: Ginkgo biloba L., Characteristics of photosynthesis, Midday depression of photosynthesis