BioCro 0.93

Radiation use efficiency based model

Usage

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

Arguments

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.

Value

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.

Description

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).

Note

This empirical model is useful but it has limitations.

References

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.

Examples

## See RUEmodMY

See also

RUEmodMY