Coupling a physical model for estimation of plant transpiration rates to a functional-structural plant model

• Grant number: 13/19374-8
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: January 04, 2014
• End date: January 03, 2015
• Field of knowledge: Agronomical Sciences - Agronomy - Agricultural Meteorology
• Principal Investigator: Quirijn de Jong van Lier
• Grantee: Angelica Durigon
• Supervisor: Klaas Metselaar
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Institution abroad: Wageningen University, Netherlands
• Associated to the scholarship: 12/09316-8 - Physical parameterizations of a model for estimation of plant transpiration rates, BP.PD

Abstract

To estimate the transpiration rate of a crop canopy, the Ags model by Jacobs (1994) upscale the transpiration rate estimated at a leaf scale and considers a constant plant height and a constant leaf area through the canopy (static plant structure). This is not in fact observed in the field, especially when plants are water stressed. A better representation of plant architecture and structure and explicit information about plant development over time can be done using the concept of functional-structural plant model (FSPM). These models explicitly describe the development over time of the 3D architecture or structure of plants as governed by physiological processes which, in turn, depend on environmental factors. The objectives of the postdoctoral internship project are to develop a functional-structural plant model for common bean (Phaseolus vulgaris L.) under distinct water supply conditions and couple it to the Ags model, and to yield a complete data set by growing common bean in an outdoor experiment under different water supply conditions to support the development of the functional-structural plant model for common bean and the calibration and validation of the Ags model coupled to it. The main outcomes expected from the internship are a well-parameterized and validated functional-structural plant model for common bean, and a robust method to scale up from leaf to a crop canopy and the light extinction in the Ags model. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DURIGON, ANGELICA; EVERS, JOCHEM; METSELAAR, KLAAS; VAN LIER, QUIRIJN DE JONG. Water Stress Permanently Alters Shoot Architecture in Common Bean Plants. AGRONOMY-BASEL, v. 9, n. 3, MAR 26 2019. (12/09316-8, 13/19374-8)

DURIGON, ANGELICA; VAN LIER, QUIRIJN DE JONG; METSELAAR, KLAAS. Forcing variables in simulation of transpiration of water stressed plants determined by principal component analysis. INTERNATIONAL AGROPHYSICS, v. 30, n. 4, p. 431-445, OCT 2016. (12/09316-8, 13/19374-8)