adc_ingr: ADC of a feed ingredient (ADCingr)

In aquacultuR: A Comprehensive R Tool for Zootechnical Metrics

ADC of a feed ingredient (ADCingr)

Description

Function to calculate the Apparent Digestibility Coefficient of a nutrient contained in a feed ingredient of a compound diet. The calculation of the ADCingr is based on equation 4 proposed by Bureau & Hua (2006).

Usage

adc_ingr(
  adc_test,
  adc_ref,
  nut_ref,
  nut_ingr,
  dm_ref = 1,
  dm_ingr = 1,
  incl_ingr = 0.3
)

Arguments

adc_test	a numeric value in the interval [0,1] that represents the Apparent Digestibility Coefficient (ADC) of the diet that contains the ingredient to be tested.
adc_ref	a numeric value in the interval [0,1] that represents the Apparent Digestibility Coefficient (ADC) of the reference diet without the ingredient to be tested.
nut_ref	a numeric value in the interval [0,1] that represents the inclusion rate of the nutrient in the reference diet.
nut_ingr	a numeric value in the interval [0,1] that represents the inclusion rate of the nutrient in the test diet for which the Apparent Digestibility Coefficient (ADC) of the nutrient in the ingredient will be calculated.
dm_ref	a numeric value in the interval [0,1] (default: 1) that represents the dry matter content of the reference diet.
dm_ingr	a numeric value in the interval [0,1] (default: 1) that represents the dry matter content of the tested feed ingredient.
incl_ingr	a numeric value in the interval [0,1] (default: 0.3) that represents the inclusion rate of the ingredient in the test diet for which the Apparent Digestibility Coefficient (ADC) of the nutrient in an ingredient will be calculated.

Value

returns a single numeric value in the interval [0, 1], which is the relative ADC for the diet. If the value is not within the interval, an additional warning is returned.

Author(s)

Anıl Axel Tellbüscher

References

Bureau, D. P., & Hua, K. (2006): Letter to the Editor of Aquaculture. Aquaculture, 252, p.103–105.

Bureau, D. P., Harris, A. M., & Cho, C. Y. (1999): Apparent digestibility of rendered animal protein ingredients for rainbow trout (Oncorhynchus mykiss). Aquaculture 180, p.345-358.

Examples

# Example from Bureau et al. (1999) - Blood meal 2

# reference feed dry matter: 0.928 (92.8%)
# reference feed nutrient mass frac.: 0.45 (45%)
# reference feed apparent digestibility coef.: 0.923 (92.3%)
# test feed apparent digestibility coef.: 0.902 (90.2%)
# test ingredient dry matter: 0.895 (89.5%)
# test ingredient nutrient mass frac.: 0.846 (84.6%)

adc_ingr(adc_ref = 0.923, 
         nut_ref = 0.45, 
         dm_ref = 0.928,
         adc_test = 0.902, 
         nut_ingr = 0.846,
         dm_ingr = 0.895)

aquacultuR documentation built on Jan. 26, 2026, 5:07 p.m.