中国农业科技导报 ›› 2022, Vol. 24 ›› Issue (7): 159-166.DOI: 10.13304/j.nykjdb.2021.0827

• 生物制造 资源生态 • 上一篇    下一篇

基于涡度相关法的水稻光能利用率研究

文双雅(), 石楠, 陈崇怡, 胡海燕, 高志强()   

  1. 湖南农业大学农学院,长沙 410128
  • 收稿日期:2021-09-22 接受日期:2021-12-09 出版日期:2022-07-15 发布日期:2022-08-15
  • 通讯作者: 高志强
  • 作者简介:文双雅 E-mail:840305341@qq.com
  • 基金资助:
    国家重点研发计划项目(2017YFD0301506)

Research on Light Use Efficiency of Rice Based on Eddy Covariance Method

Shuangya WEN(), Nan SHI, Chongyi CHEN, Haiyan HU, Zhiqiang GAO()   

  1. Agronomy College of Hunan Agricultural University,Changsha 410128,China
  • Received:2021-09-22 Accepted:2021-12-09 Online:2022-07-15 Published:2022-08-15
  • Contact: Zhiqiang GAO

摘要:

为探讨水稻生长季内光能利用率(light use efficiency,LUE)的动态特征,使用2020年5—9月稻田通量观测资料,应用简单相关分析和通径分析方法,分析环境因子对光能利用率的影响。结果表明,水稻生长季LUE日平均值为0.95%,波动范围为0.25%~2.23%,小时尺度表现为早晚值较高、中午值较低,日动态上呈现先升高后降低的单峰曲线变化;日尺度上的LUE主要受光合有效辐射和空气温度影响。研究为合理利用农田生态系统资源、推动LUE在生产力模型中的应用提供了理论依据。

关键词: 水稻, 光能利用率, 涡度相关法

Abstract:

In order to explore the dynamic characteristics of light use efficiency (LUE) during the growing season of rice, the flux observation data of rice field from May to September in 2020 was studied. The effects of environmental factors on LUE were analyzed by applying simple correlation analysis and path analysis methods. The results showed that the fluctuation range of LUE was from 0.25% to 2.23% with the average value 0.95%. And LUE at hour scale showed higher values in the morning and evening, and lower values at noon, which daily dynamics showed a single-peak curve change of firstly increasing and then decreasing. LUE in daily scale was mainly influenced by photosynthetic effective radiation and air temperature, which provided theoretical basis for rationally utilizing farmland ecosystem resources and promoting the application of LUE in productivity model.

Key words: rice, light use efficiency, eddy covariance method

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