您好，欢迎访问北京市农林科学院 机构知识库！
北京市农林科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Evaluating the Effect of Multiple Scattering on Interception of Photosynthetically Active Radiation at Organ Scale Within Maize Canopy

文献类型： 外文期刊

作者： Meng, Jun 1 ; Guo, Xinyu 1 ; Du, Xiaohong 1 ; Wen, Weiliang 1 ; Lu, Shenglian 1 ; Xiao, Boxiang 1 ;

作者机构： 1.China Natl Engn Res Ctr Informat Technol Agr NERC, Beijing 100097, Peoples R China

2.Luoyang Normal Univ, Dept Life Sci, Luoyang 471022, Henan Province, Peoples R China

关键词： The Nested Radiosity Model; Multiple Scattering; Spatial Distribution; Canopy; Photosynthetically Active Radiation

期刊名称：SENSOR LETTERS （ 影响因子：0.558； 五年影响因子：0.58 ）

ISSN： 1546-198X

年卷期： 2010 年 8 卷 1 期

页码：

收录情况： SCI

摘要： Multiple scattering is a critical factor that affects the spatial distribution of photosynthetically active radiation (PAR) within the canopy. But it is neglected sometimes to reduce the numerical complexity in plant functioning simulation with no adequate assessment. In this study, using VisuAlea visual programming tool and Caribu module which based on the nested radiosity method, PAR interception at organ scale is analyzed on the basis of 3-dimentional architecture model of maize canopy which consists of 50 plants. Combining with photosynthesis model, the importance of multiple scattering to canopy PAR distribution is evaluated. The result shows that, the multiple scattering take notable effect on PAR intensity on leaf surface (vertical bar t vertical bar > t(0.05)), especially the lower surface, and lead to a 19.88% enhancement of absorbed energy. Due to the high light usage ratio when PAR far below the saturation point, leaves under multiple scattering conditions show an average of 7.48 mu mol CO2.m(-2).s(-1) photosynthesis rate, 23.43% more than control's 6.06 mu mol CO2.m(-2).s(-1). Although leaves in the lower layers of the canopy can not receive as much scattering as those in the upper layers, their resultant photosynthesis promotion almost equal. As a conclusion, the multiple scattering affect spatial distribution of PAR within the canopy significantly, and the multiple scattering process should be considered with special attention in crop growth simulation, especially in agronomical view.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：北京市农林科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台