Gas exchange and growth/decline model of C3 turfgrass fields under various light conditions

Takashi Matsubara, Yoshiko Kosugi, Satoru Takanashi and Kiyotoshi Otsuka

Ecological Modelling, 2019, vol. 397, issue C, 107-121

Abstract: We developed a predictive model based on the mechanisms of photosynthesis and growth/decline in C3 turfgrass, which has applications for turfgrass management plans over a wide range of environments, including shaded growth conditions, such as turfed football stadiums. The numerical formulas, algorithms, and parameters for defining photosynthesis and the growth/decline in a turfgrass community are presented. The parameters that were optimized to simulate photosynthesis and growth/decline were included in the multilayer model for gas exchange and the vegetation growth/decline model. The model was validated using data collected on leaf biomass, root biomass, leaf area index, cumulative mowing, cumulative root growth, and litter (leaf and root) over a 2-year period in a stadium in which Japanese Professional Football League games are played. We also developed an algorithm to simulate and map the growth conditions in two dimensions. To fit the simulated and observed data better, we varied the parameters by season and irradiance conditions. The results showed that changes in leaf and root biomass over intervals that were less than annual affected gas exchange and the balance between respiration and assimilation rates and, in turn, caused changes in leaf and root biomass.

Keywords: Photosynthesis; Respiration; Leaf biomass; Root biomass; Low irradiance; Football stadium (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:397:y:2019:i:c:p:107-121

DOI: 10.1016/j.ecolmodel.2018.09.012

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