1. General Model Information
Name: HEDGEROW 1.0 - Hedgerow canopy gross photosynthesis.
Acronym: HEDGEROW
Main medium: terrestrial
Main subject: agriculture
Organization level: ecosystem, biocoenosis, population
Type of model: ordinary differential equations
Main application:
Keywords: photosynthesis, intercropping, hedgerows, light interception, heterogenous canopies
Contact:
Ir. J.G. Gijzen.
Wageningen Agricultural University, Dept. Horticulture, Haagsteeg 3, 6708 PM Wagen ingen, THE NETHERLANDS.
Phone: +31.317.482397
Fax: +31.317.484709
email: hans.gijzen@users.tbpt.wau.nl
Author(s):
Abstract:
The model calculates gross photosynthesis of a hedgerow crop (i.e. the rows were assumed to have a rectangular transsection and to be infinitely long). Diffuse and direct light distribution and absorption are calculated taking account of scattering and reflection. Leaf photosynthesis is calculated from absorbed light and integrated over the row. Purpose of the model:
Model parentage: -
Source of the AbstractCAMASE Register of Agro-ecosystems Models
II. Technical Information
II.1 Executables:
Operating System(s): Any computer. Contract necessary: Costs: : None. Comments:
II.2 Source-code:
Programming Language(s): Microsoft FORTRAN-77.
II.3 Manuals:
II.4 Data:
III. Mathematical Information
III.1 Mathematics
III.2 Quantities
Rate variables: Leaf gross photosynthesis, photosynthetic active radiation absorption, crop gross photosynthesis.
State variables: None.
III.2.1 Input
Leaf photosynthesis parameters, leaf area index, row height, path width, latitude, day of year, hour of day, fraction diffuse photosynthetic active radiation. Input check in model: No.
III.2.2 Output
Instantaneous crop gross photosynthesis, canopy photosynthetic active radiation absorption.
Basic spatial unit: m2.
Time interval of simulation: Instantaneous.
IV. References
Gijzen, H. & J. Goudriaan, 1989. A flexible and explanatory model of light distribution and photosynthesis in row crops. Agricultural and Forest Meteorology 48: 1-20
V. Further information in the World-Wide-Web
VI. Additional remarks
Parentage: -
Last review of this document by: T. Gabele : Tue Sep 23 1997
Status of the document:
last modified by
Joachim Benz Mon Jul 2 18:31:37 CEST 2007