What is the difference between as fed and dry matter basis?

What is the difference between as fed and dry matter basis?

Dry Matter is the value for a nutrient assuming all moisture is removed. Dry matter is mostly used by veterinarians because it yields specific information on a more uniform basis. As Fed would be the value for a nutrient without removing the moisture.

How do you convert dry matter basis to as Fed?

To convert weights from a dry matter to an as-fed basis, divide by the as-fed dry matter percentage value, expressed as a decimal. On an as-fed basis, a feedlot finishing ration is 60 percent DM.

Is it better to compare forages on an as submitted basis or a dry matter basis?

Comparing feeds – Dry matter basis results should be used for comparing feeds, especially when they vary in dry matter content. Nutrients (protein, carbohydrates, etc.) are contained in the dry matter only. Removing water and its dilution effect are essential to make valid comparisons between feeds.

What is a dry matter basis?

Dry matter basis is the percentages of nutrients in a pet food when its moisture content is 0%. In other words, we get the dry matter basis when we dry out a pet food until there is no water left in it. We do this to easily compare various pet foods, especially when they have different moisture contents.

What does as Fed mean in dog food?

‘As fed’ means as the food comes out of the bag or can. This is an important detail because we cannot really compare different dog foods on an ‘as fed’ basis. Instead we need to compare nutrient profiles on a ‘dry matter’ basis, with all the water removed.

Is dry matter basis referred to as DM?

The dry matter (DM) content of a feed is determined by weighing a sample before and after complete drying. For example, if a sample of silage weighs 100 grams before drying and 40 grams after, it contains 40% DM.

Why is it important to compare feeds on a dry matter basis?

Dry matter content of a feedstuff is important because it reveals the actual amounts of various nutrients available to the animal consuming the feed. As fed represents the feed or forage as it is fed to the animal including the moisture content.

Why is the amount of dry matter in a ration important?

Dry matter is also important because rations are formulated on a dry matter basis. This allows us to compare the nutrient content of different feeds on a level playing field. Changes in dry matter can greatly influence the amount of forage needed to provide specific nutrients in the diet.

What is a good hay analysis for cattle?

Low-quality hay is generally 45 to 52% TDN. Mid-quality hay is generally 52% to 58% TDN, and high-quality hay is greater than or equal to 58% TDN. A dry cow requires a minimum of 48% TDN, and a lactating cow needs a diet that is at least 60% TDN per day.

How do you calculate dry matter basis?

1) Figure the dry matter percentage. Subtract the moisture content from 100%. In this example 100% – 75.9% = 24.1% dry matter. 2) Convert individual nutrients from “as fed” to “dry matter”.