自然资源学报 ›› 2002, Vol. 17 ›› Issue (1): 110-116.doi: 10.11849/zrzyxb.2002.01.016

• 研究方法 • 上一篇    下一篇

夏玉米冠层内PAR截获及FPAR与LAI的关系

周晓东, 朱启疆, 王锦地, 孙睿, 陈雪, 吴门新   

  1. 北京师范大学资源与环境科学系环境遥感与数字城市北京市重点实验室
  • 收稿日期:2001-05-18 修回日期:2001-06-25 出版日期:2002-02-25 发布日期:2002-02-25
  • 作者简介:周晓东(1973~)男,河南洛阳人,北京师范大学博士生,主要从事遥感应用和土地荒漠化方面工作。E-mail:xd_zhou@263.net
  • 基金资助:

    国家自然科学基金(49871055);国家自然科学重点基金(39990490);国家重点基础研究发展规划973项目(2000077906);教育部博士点基金(1999002713);高校骨干教师资助

Interception of PAR,relationship between FPAR and LAI in summer maize canopy

ZHOU Xiao-dong, ZHU Qi-jiang, WANG Jin-di, SUN Rui, CHEN Xue, WU Men-xin   

  1. Department of Geography,Beijing Normal University,Beijing Key Lab.for Remote Sensing of Environment and Digital Cities,Beijing100875,China
  • Received:2001-05-18 Revised:2001-06-25 Online:2002-02-25 Published:2002-02-25

摘要: 论文通过对河北栾城地区夏玉米生长期内晴天和昙天冠层中PAR的观测,研究了入射PAR、玉米冠层的反射PAR、透过玉米冠层到达地表的PAR、地表的反射PAR、地表反射率、玉米冠层吸收的PAR(APAR)、玉米冠层的反射率及地表反射率的日变化情况;根据冠层中各PAR分量计算出一天中各时刻的PAR吸收系数(FPAR)和日平均值,发现从玉米拔节期到灌浆期FPAR和叶面积指数(LAI)之间有很好的线性关系,其相关系数达0.994。

关键词: 玉米, 冠层, PAR, FPAR, LAI

Abstract: On the basis of an observation to summer maize canopy PAR during growing period at Luancheng,Hebei,the incident PAR,the reflective PAR of the canopy,the PAR reached the land surface through canopy,the reflective PAR of the land surface,the reflectance of land surface,the Absorbed Photosynthetically Active Radiation(APAR)and the reflectance diurnal change of the canopy and land surface under clear and cloudy conditions respectively were stud-ied in this paper.Also,the FPAR at an interval of five minutes and the average value of a day were calculated according to each PAR components in canopy.Then the relationship between daily variation of FPAR and crop growth periods as well as the variation of LAI were examined and a linear relationship between FPAR and LAI was presented.

Key words: summer maize, canopy, PAR, FPAR, LA I