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Calculate diet metabolizable energy contribution for a ration component

Source: R/core_model_ration_quality.R
calc_ration_metabolizable_energy.Rd

Applies species-specific metabolizable energy parameters to a ration composition share to compute the contribution of a single feed component to total diet metabolizable energy content.

Usage

calc_ration_metabolizable_energy(
  species_short,
  feed_ration_fraction,
  feed_metabolizable_energy_ruminant = NA_real_,
  feed_metabolizable_energy_pigs = NA_real_
)

Arguments

species_short

Character. Code identifying the livestock species. Supported values include:

  • PGS: pigs

  • CML: camels

  • CTL: cattle

  • BFL: buffalo

  • SHP: sheep

  • GTS: goats

feed_ration_fraction

Numeric. Proportion of a specific feed component in the total ration, expressed as its fraction of diet dry matter intake (fraction). Within each herd_id and cohort, proportions should sum to 1.

feed_metabolizable_energy_ruminant

Numeric. Metabolizable energy content of a feed component for ruminants, representing digestible energy minus energy losses in urine and gaseous products of digestion (MJ/kg DM).

feed_metabolizable_energy_pigs

Numeric. Metabolizable energy content of a feed component for pigs, representing digestible energy minus energy losses in urine and gaseous products of digestion (MJ/kg DM).

Value

Numeric. Contribution of the feed component to total diet metabolizable energy content (MJ/kg DM).

Details

The metabolizable energy contribution uses the animal-specific parameter:

  • Ruminants (CTL, BFL, CML, SHP, GTS): feed_ration_fraction * feed_metabolizable_energy_ruminant

  • Pigs (PGS): feed_ration_fraction * feed_metabolizable_energy_pigs

This function is part of the run_ration_quality_module().

See also

run_ration_quality_module