Maintenance Respiration Model Accounting for Organ Age or Biomass?

Modelling Plant Processes
1

Hi everyone,

I am developing an FSPM model of dwarf tomatoes, but I consistently obtain a lower-than-expected yield. After ruling out several factors, I suspect that I might be overestimating maintenance respiration.

Currently, I use maintenance respiration values per organ from Heuvelink’s thesis and apply the temperature correction factor as described there. However, I have come across some references suggesting that maintenance respiration may vary with the age or biomass of an organ.

		maintenanceDemand = maintenanceRespiration * dry_biomass_structural_mg	* Math.pow(c_q_10_respiration, (AVERAGE_TEMP - 25)/10) ;

Does anyone know of a model that accounts for maintenance respiration changes based on organ age, biomass, or similar factors? Any references or insights would be greatly appreciated!

Thanks!

2

problem solved:
I read carefully Heuvelink thesis and he does account for influence of relative growth rate on maintenance respiration

		maintenanceDemand = maintenanceRespiration * dry_biomass_structural_mg	* Math.pow(c_q_10_respiration, (AVERAGE_TEMP - 25)/10) * (1 - Math.pow(Math.E, -33*pb[relative_growth_rate_last_5_days])) ;
3

Hello Michele, usually, you can expect the overall plant maintenance respiration to be around 50% of the gross primary productivity. So maybe check that you have such values at maturity.

Example implementations:

  • XPalm:

Also, you can take inspiration from the following references:

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