Soil-plant resistances

Calculates and draws rhizosphere, root, stem and leaf resistances for simulation time steps

Usage

resistances(
  x,
  cohort,
  relative = FALSE,
  draw = FALSE,
  cumulative = FALSE,
  xlab = NULL,
  ylab = NULL
)

Arguments

x

An object of class spwb, pwb, growth or fordyn. The function only works with the result of simulations with transpirationMode = "Sperry" or transpirationMode = "Sureau".

cohort

An string indicating the cohort for which resistances are desired.

relative

A boolean flag to indicate that relative percentages are desired as output.

draw

A boolean flag to indicate that a plot should be drawn (only pathway resistances, without discriminating between soil layers).

cumulative

A flag to indicate that drawn series should be cumulative.

xlab

x-axis label.

ylab

y-axis label.

Value

If draw = FALSE, the function returns list with three items:

• pathway: A data frame with dates in rows and resistance segments in columns (Rhizosphere, Root, Stem and Leaf).

• root: A data frame with dates in rows and root resistances for soil layers in columns.

• rhizosphere: A data frame with dates in rows and rhizosphere resistances for soil layers in columns.

Values depend on whether relative = TRUE (percentages) or relative = FALSE (absolute resistance values).

If draw = TRUE, a plot object is returned showing the time series of pathway resistances.

Details

The function makes internal calls to hydraulics_soilPlantResistancesWeibull or hydraulics_soilPlantResistancesSigmoid depending on the value of transpirationMode in x.

See also

waterUseEfficiency, droughtStress

Author

Miquel De Cáceres Ainsa, CREAF

Léa Veuillen, INRAE-URFM