RUEmod: Radiation use efficiency based model
In BioCro: Simulation of Biomass Crops

Description Usage Arguments Value Note References See Also Examples

Simulates leaf area index, biomass and light interception. Based on the Monteith (1973) equations, adapted for Miscanthus by Clifton Brown et al.(2001) (see references).

1 2	RUEmod(Rad, T.a, doy.s = 91, doy.f = 227, lai.c = 0.0102, rue = 2.4, T.b = 10, k = 0.68)

`Rad`	Daily solar radiation (MJ ha^{-2}).
`T.a`	Daily average temperature (Fahrenheit).
`doy.s`	first day of the growing season, default 91.
`doy.f`	last day of the growing season, default 227.
`lai.c`	linear relationship between growing degree days and leaf area index.
`rue`	radiation use efficiency, default 2.4.
`T.b`	base temperature for calculating growing degree days, default 10.
`k`	light extinction coefficient, default 0.68.

a list structure with components

`doy`	day of the year.
`lai.cum`	cumulative leaf area index.
`AG.cum`	cumulative above ground dry biomass (Mg ha^{-1}).
`AGDD`	cumulative growing degree days.
`Int.e`	Intercepted solar radiation.

This empirical model is useful but it has limitations.

Monteith (1973) Principles of Environmental Physics. Edward Arnold, London. UK.

Clifton-Brown, J.C., Long, S.P. and Jorgensen, U. with contributions from S.A. Humphries, Schwarz, K.-U. and Schwarz, H. (2001) Miscanthus Productivity. Ch 4. In: Miscanthus for Energy and Fibre. Edited by: Jones, Michael B. and Walsh, Mary. James & James (Science Publishers), London, UK.

RUEmodMY