四川农业大学学报 ›› 2007, Vol. 25 ›› Issue (04): 484-488.doi: 10.16036/j.issn.1000-2650.2007.04.010

• 研究论文 • 上一篇    下一篇

扁穗牛鞭草光合特性研究

陈灵鸷, 杨春华, 傅鲜桃, 刘利芬   

  1. 四川农业大学 动物科技学院, 四川 雅安 625014
  • 收稿日期:2007-04-26 出版日期:2007-12-31 发布日期:2017-03-04
  • 基金资助:
    四川省科技厅应用基础研究项目(05JY029-035-2);教育部新世纪优秀人才支持计划项目(NCET-04-0909)

Study on the Photosynthetic Characteristics of Hemarthria compressa

CHEN Ling-zhi, YANG Chun-hua, FU Xian-tao, LIU Li-feng   

  1. College of Animal Science and Technology, Sichuan Agricultural University, Yaan 625014, Sichuan, China
  • Received:2007-04-26 Online:2007-12-31 Published:2017-03-04

摘要: 利用Li-6400型光合作用测定系统测定了扁穗牛鞭草的光合特性。试验结果显示:扁穗牛鞭草叶片的光合日进程呈"单峰型",光饱和点较高,在2200μmol/(m2·s)以上仍然未达到饱和,光补偿点为4.53μmol/(m2·s),表观量子效率为0.038,CO2饱和点为1200μmol/mol,补偿点8.29μmol/mol,羧化效率(CE)为0.273。通过对净光合速率和其他相关因素的日变化分析得知:光量子通量密度是影响扁穗牛鞭草净光合速率的主要环境因子。

关键词: 扁穗牛鞭草, 光合速率, 光量子通量密度, 光合特性

Abstract: The photosynthetic characteristics of Hemarthria compressa cv. Guangyi was measured by the Li-6400 portable photosynthesis system. The results showed that daily variation of net photosynthetic rate in leaves presented a single peak curve. Light saturation point was higher than 2200 μmol/(m2·s), light compensation point was 4.53 μmol/(m2·s), and apparent quantum efficiency was 0.038;CO2 saturation point was about 1200 μmol/mol, and CO2 compensation point was 8.29 μmol/mol, and carboxylation efficiency was 0.273. The analysis of diurnal changes of the net photosynthetic rate and other relative factors showed that photo flux density is the key factor influencing diurnal changes of net photosynthetic rate.

Key words: Hemarthria compressa, photosynthetic rate, photo flux density, photosynthetic characteristic

中图分类号: 

  • S543