A model of canopy irradiance in relation to changing leaf area in a phytotron-grown snap bean (Phaseolus vulgaris L.) Crop


Journal Article

Simple exponential decay models were used to describe the variation in irradiance profiles within a snap bean (Phaseolus vulgaris L.) canopy over a 33-day period of canopy development. The extinction coefficients of these models were varied over time as a function of changing canopy leaf area; nonlinear least-squares procedures were used to estimate parameter values. The resultant model response surfaces depict the changes in canopy irradiance that accompany canopy maturation and illustrate the dynamic nature of canopy closure. A criterion index is defined to aid in assessing the applicability of these models for use in whole-plant simulation models, and an evaluation of these models is given based on this index, their predictive accuracy, and the utility for use within varying modeling frameworks. © 1984 Swets & Zeitlinger.

Full Text

Duke Authors

Cited Authors

  • Lieth, JH; Reynolds, JF

Published Date

  • March 1, 1984

Published In

Volume / Issue

  • 28 / 1

Start / End Page

  • 61 - 71

Electronic International Standard Serial Number (EISSN)

  • 1432-1254

International Standard Serial Number (ISSN)

  • 0020-7128

Digital Object Identifier (DOI)

  • 10.1007/BF02193516

Citation Source

  • Scopus