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- # Light
- Light photoperiod is calculated as detailed in
- Section @ref(Photoperiod). Photoperiod affects wheat phenology.
- Light intensity and photoperiod also have an effect on diffuse light
- fraction, so that it could impact
- the diffuse factor ($f_{d}$; Equation \@ref(eq:BiomassProduction); Section @ref(Radiation-limited-biomass))
- and reduce the radiation-limited biomass accumulation ($\Delta Q_{r}$;
- Section @ref(Radiation-limited-biomass)). However, in the current
- APSIM-Wheat, the diffuse factor equals to 1 (i.e. no impact of diffuse
- light on biomass production).
- Light intensity affects
- * radiation-limited biomass accumulation ($\Delta Q_{r}$; Section @ref(Radiation-limited-biomass))
- via the radiation interception ($I$; Equation \@ref(eq:RadiationInterception)),
- which depends on the incoming radiation ($I_{0}$) and on a light-interception
- factor ($f_{h}$ ) based on the canopy width. However, this canopy
- factor has no impact in the current version of APSIM-Wheat ($f_{h}$
- = 1),
- * LAI senescence under low light condition ($\Delta LAI_{sen,\,light}$;
- Equation \@ref(eq:SensLight)).
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