A modified CROPGRO model for simulating soybean growth in controlled environments.
The CROPGRO crop growth model is adapted in order to analyze experimental data from a soybean (cv. Hoyt) experiment conducted at elevated CO2 levels (1200 micromol mol-1) at Kennedy Space Center, FL. The following adaptations to original CROPGRO produced model agreement with gas-exchange data: the input of square-wave temperature and photosynthetically active radiation (PAR) profiles; the input of the appropriate hydroponic substrate PAR albedo; modified biomass partitioning and developmental parameters; an increased leaf area expansion rate through the fifth vegetative node; a decreased specific leaf area after the fifth vegetative node; and an increased incident diffuse PAR fraction over typical field values. The model demonstrated here suggests that with continued development, modified CROPGRO will be a useful tool in the analysis and eventual optimization of legume production in bioregenerative life support systems.
Cavazzoni
J
J
Department of Biology, New York University 10003, USA. jmv4031@is2.nyu.edu
Volk
T
T
Stutte
G
G
D018533:Biomass; D002245:Carbon Dioxide; D003198:Computer Simulation; D018504:Ecological Systems, Closed; D004780:Environment, Controlled; D005069:Evaluation Studies as Topic; D008021:Life Support Systems; D008027:Light; D008954:Models, Biological; D010788:Photosynthesis; D018515:Plant Leaves / Q000254:growth & development / Q000528:radiation effects; D013025:Glycine max / Q000254:growth & development* / Q000528:radiation effects; D013696:Temperature
D002245:Carbon Dioxide