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林业科学 ›› 2002, Vol. 38 ›› Issue (1): 44-49.doi: 10.11707/j.1001-7488.20020107

• 论文及研究报告 • 上一篇    下一篇

增施CO2气肥对国槐幼苗生长与生理特性的影响

冷平生 马世超 李树蓉 郭平   

  1. 北京农学院园林系,北京102206;北京市林业局,北京100029
  • 收稿日期:1999-10-08 修回日期:1900-01-01 出版日期:2002-01-25 发布日期:2002-01-25

EFFECTS OF CO2 ENRICHMENT ON GROWTH AND PHYSIOLOGICAL PROPERTIES OF SOPHORA JAPONICA L. SEEDLINGS

Leng Pingsheng,Ma Shichao,Li Shurong,Guo Ping   

  1. Department of Forestry, Beijing Agricultural College Beijing 102206;Beijing Municipal Forestry Bureau Beijing 100029
  • Received:1999-10-08 Revised:1900-01-01 Online:2002-01-25 Published:2002-01-25

摘要:

用BEM 1系统自动测控CO2 浓度,在塑料大棚内对国槐实生幼苗进行600、800、1000、1500和2000μmol/mol5水平CO2 气肥试验,每天施气3~5h ,持续80d。试验结果表明,CO2 气肥显著促进国槐幼苗的生长,以1500μmol·mol-1 CO2 气肥促生效果最佳,与对照比较,干重增加41.45% ,淀粉含量增加44.95% ,光合速率增加160% ;CO2 气肥同时使气孔阻力增加,这可能有利于提高植物水分利用率;CO2 气肥使叶绿素含量下降,电镜照片显示,高浓度CO2 气肥处理的国槐叶绿体内,淀粉颗粒既多且大,对基粒造成挤压,可能对光合作用产生反馈抑制作用,CO2 气肥使国槐幼苗氨基酸含量下降,增加C N ,建议对国槐幼苗生长宜采用1000~1500μmol·mol-1 水平CO2 气肥,配合施用氮肥,会取得较好的促生效果。

关键词: CO2气肥, 国槐, 幼苗生长, 光合作用

Abstract:

Sophora japonica L. Seedlings were grown under atmospheric CO2 enrichment levels of 600、800、1000、1500 and 2000?μmol·mol-1 within film greenhouse with monitorring CO2 concentration by BEM 1 system for 3~5 hours every day and lasted 80 days CO2 enrichment promoted significantly seedling growth,1500?μmol·mol -1 CO22 level was proved to be best one among 5 CO2 enrichment levels,with 41.45%、 44.95% and 160% increase of dry weight、starch content and photosynthetic rate respectively. stomatal resistances of seedlings grown under high CO2 enrichment levels were higher than the control,which was benefical to improve water use efficiency(WUE),total amino acid contents was lower,which increased C/N of seedlings,microstructure of chloroplast shown that starch acclimation of the seedlings grown under high CO2 level reduced grana formation,which may result in down regulation on photosynthesis,thus,1000~1500?μmol·mol-1 CO2 enrichment level with N fertilizer was recommended to Sophora japonica L. seedling cultivation

Key words: CO22enrichment, Sophora japonica L., Seedling growth, Photosynthesis