Hohenheim feed value test

from Wikipedia, the free encyclopedia

The Hohenheim feed value test (HFT) (also gas test ) is a method of feed analysis . It is one of the in-vitro methods. It is used to determine the energetic feed value and is established as a standard procedure.

method

Rumen juice is removed from test animals through a fistula . A feed sample weighing 200 milligrams is incubated for 24 hours at 39 degrees Celsius . The bacteria contained in the rumen juice produce gases during conversion, which are measured.

A formula is used to deduce the convertible energy (ME) from the gas formation . However, this requires an analysis of the raw nutrient content.

use

The method is mainly used in official feed controls to determine the energy content of milk performance feeds.

disadvantage

Donor animals for the rumen juice must be available for the Hohenheim feed value test. As a result, the costs are comparatively high. The microbial composition of the rumen juice can vary depending on the animal and previous feeding.

See also

Further methods of feed analysis are:

  • the in vitro cellulase method according to de Boever , also called ELOS,
  • the in vivo method, also known as the mutton test ,
  • the in-situ method, in which the dry matter breakdown is measured in fistulated animals.
  • the Weender analysis to determine ingredients.

literature

  • HH Menke, H. Steingass: Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid. Animal Research and Development, 1988, 28, 7-55.

Web links

Individual evidence

  1. ^ LKV Baden-Württemberg
  2. ↑ University of Bonn (PDF; 365 kB)
  3. ↑ Bachelor thesis Bruijnen (PDF; 4.4 MB)