How is the nitrogen free extract calculated in animal feeds?

How is the nitrogen free extract calculated in animal feeds?

• A. By adding all nutrients and subtracting from 100
• B. From protein and minerals alone
• C. By weighing the feed
• D. Only using carbohydrates

Answer: (A)

The calculation of nitrogen-free extract (NFE) in animal feeds involves determining the portion of the feed that consists of soluble carbohydrates and excludes nitrogenous compounds. The correct approach is to add up all the major nutrient components of the feed (including crude protein, crude fat, crude fiber, moisture, and ash) and then subtract this total from 100. This gives the remaining portion of the feed, which is primarily made up of non-fibrous carbohydrates such as sugars and starches, effectively providing the nitrogen-free extract value. The other methods mentioned in the incorrect choices do not accurately establish the nitrogen-free extract. For instance, calculating it from protein and minerals alone is incorrect because it neglects other significant components. Weighing the feed does not relate to the NFE calculation, as it requires a detailed analysis of the nutrient composition. Lastly, using only carbohydrates would not encompass the necessary components needed to derive a comprehensive nitrogen-free extract value. Thus, the correct method emphasizes the summation of all nutrients to evaluate the nitrogen-free extract effectively.

The calculation of nitrogen-free extract (NFE) in animal feeds involves determining the portion of the feed that consists of soluble carbohydrates and excludes nitrogenous compounds. The correct approach is to add up all the major nutrient components of the feed (including crude protein, crude fat, crude fiber, moisture, and ash) and then subtract this total from 100. This gives the remaining portion of the feed, which is primarily made up of non-fibrous carbohydrates such as sugars and starches, effectively providing the nitrogen-free extract value.

The other methods mentioned in the incorrect choices do not accurately establish the nitrogen-free extract. For instance, calculating it from protein and minerals alone is incorrect because it neglects other significant components. Weighing the feed does not relate to the NFE calculation, as it requires a detailed analysis of the nutrient composition. Lastly, using only carbohydrates would not encompass the necessary components needed to derive a comprehensive nitrogen-free extract value. Thus, the correct method emphasizes the summation of all nutrients to evaluate the nitrogen-free extract effectively.