-
Nutrient digestibility
Digestibility is the proportion of nutrients that enzymes of the gastrointestinal tract break down and are absorbed by the animal to be used for metabolic purposes. Digestibility quantifies the amount of nutrients consumed by animals and subtracts the amount of nutrients excreted. To quantify undigested nutrients, samples are collected and analyzed for the nutrient(s) of interest. Depending on the nutrient of interest (i.e., carbohydrates, amino acids, lipids, vitamins, or minerals) samples are collected from different parts of the gastrointestinal tract. Samples for nutrients that can be fermented (e.g., amino acids and carbohydrates) are normally collected at the end of the small intestine, more specifically from the distal ileum. Samples of nutrients not subjected to chemical transformation by microbial activity like minerals can be analyzes from feces or excreta.
-
20 Replies
-
Well said
-
Scholarly responses kudos to you all hope we are going to have a wonderful 2025!Scholarly responses kudos to you all hope we are going to have a wonderful 2025!
-
bioavailabilty
-
👍
-
Thanks
-
Well detailed
-
Good information
-
✅ well done
-
In poultry, since both urine and faeces (excreta) voided through common opening (cloaca), term metabolizability of nutrient is commonly used rather digestibility.
If samples are taken at terminal ileum for analysis, then digestibility or digestible nutrients (standardized or apparent) term is opt.
-
Great observation. This is particularly used to quantify energy levels of ingredients and less common for true nutrients like amino acids, carbohydrates, and lipids.
-
-
✅
-
Good
-
Nutrient digestibility is usually expressed as a percentage. It can be calculated in terms of dry weight, organic matter, or other proximate constituents.
-
Right notes
-
Good
-
Digestible Nutrients is an estimate of the energy content of a feed, and is based on the digestible portion of the nutrients that can supply energy.
-
Ok
-
ok
-
Log in to reply.
