ISHS Acta Horticulturae 519: XXV International Horticultural Congress, Part 9: Computers and Automation, Electronic Information in Horticulture
MODELLING ABOVE-GROUND DRY MATTER AND AREA DISTRIBUTIONS OF GREEN BEANS (PHASEOLUS VULGARIS L.) FOR PROCESSING UNDER MEDITERRANEAN CONDITIONS |
| Authors: | M.E. Ferreira, M.I. Vieira, J.P.d.M. Abreu, V.V. Bianco, A.A. Monteiro |
| Keywords: | area distribution, assimilate partitioning, Dry matter distribution, green beans, modelling, Phaseolus vulgaris, pod growth |
| Abstract:
During 1992 and 1993, two field trials with green beans (Phaseolus vulgaris L., cv. Alcade) were conducted in Central Portugal with three plant populations, two irrigation levels and various harvest dates. In 1997, in the same location, the cv. Carlo, 'Cleo' and 'Mutin' were studied with seven evenly-spaced sowing dates. Water and nutrients were non-limiting. Dry matter (DM) and projected areas of plant parts (green and yellow leaves, stems and pods) were determined every week. The objective of this paper is to use these data to fit simple empirical models that can be used as sub-models to simulate dry matter partitioning, area formation, and pod growth under potential growth conditions (i. e., with ample supply of water and nutrients). For each cultivar, the fraction of total above-ground DM allocated to each plant component was plotted against thermal time, taking account of high temperature reduction of thermal time accumulation. Thermal time accumulation was the most important factor affecting assimilate partitioning. | |
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