Feedipedia
Animal feed resources information system
Feedipedia
Feedipedia

Glossary

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Name Definition
DE growing pig

Digestible energy for the growing pig. Difference between the gross energy in the feed and the gross energy in the faeces.

DE rabbit

Digestible energy for rabbits. Difference between the gross energy in the feed and the gross energy in the faeces.

DE ruminants

Digestible energy for ruminants. Difference between the gross energy in the feed and the gross energy in the faeces.

DE salmonids

Digestible energy for salmonids (salmons and trouts). Difference between the gross energy in the feed and the gross energy in the faeces.

DM

Abbreviation for dry matter.

DM degradability (effective, k=4%)

Effective degradability of dry matter in ruminants, calculated with a hourly disappearance rate of 6%. The effective degradability is calculated as D = a + ((b*c)/(k+c)) where a = fraction immediately degradable, b = fraction potentially degradable, c = degradation rate of particles and k = hourly disappearance rate of particles (Ørskov and MacDonald, 1979).

DM degradability (effective, k=6%)

Effective degradability of dry matter in ruminants, calculated with a hourly disappearance rate of 6%. The effective degradability is calculated as D = a + ((b*c)/(k+c)) where a = fraction immediately degradable, b = fraction potentially degradable, c = degradation rate of particles and k = hourly disappearance rate of particles (Ørskov and MacDonald, 1979).

DM digestibility, pepsin

Dry matter digestibility estimated by an in vitro method using pepsin, such as the one developed by Tilley and Terry (1963), which involves rumen liquor and pepsin.

DM digestibility, pepsin-cellulase

Dry matter digestibility estimated by an in vitro method combining pepsin and a cellulase enzyme.

DM digestibility, ruminants

Dry matter digestibility for ruminants, calculated as percentage of digestible (total tract) dry matter in the dry matter of the feed.

Dry matter

Dry matter is calculated as the difference between the total weight and the moisture content. It is usually obtained by oven-drying, but there are methods specific to products such as silages, fats and molasses. Usually abbreviated as DM.