Digestible organic matter

The DOMD (D-value) is the digestible organic matter in dry matter = OM sample - (OM residue - OM blank)... 

Nitric Acid and Organic Matter. The use of the mixed acids to digest organic matter may result in explosions. Explosions with vegetable oil,19 milk, calcium oxalate precipitates from plants,21 rat carcasses,22 finely ground plant material,21 and animal tissues21 have been documented. 

In the authors laboratory many acidic mixtures are used to digest organic matter in food. Containers of various materials are also adopted for the digestion of the samples so as to minimize the analytical blank. The magnitude of the latter, in fact, and the degree of uncertainty associated with it, usually limits the ability to perform reliable quantitative determinations at low concentration levels [6]. 

Mineralized tissues of skeletons and shells of molluscs, annelids, barnacles, and echinoderms may be affected by an enzymic dissolution (digestion) of the organic matrix which contains calcium carbonate crystallites (Carriker and Smith, 1969 Carriker et al., 1969). An ability to digest organic matter from within animal skeletons has been demonstrated for bacteria (DiSalvo,... 

This mode of deposition over a wide area explains the lateral uniformity observed in element composition of organic matter in Mahogany zone oil shale (16), and the similarity in properties of the oil-shale organic matter over the entire deposit. The paucity of macrofossils in the oil shale, limited largely to an occasional gar scale and the like, illustrates the power of the lake s lower layer to digest organic matter. 

Soils and sediments Digest organic matter pyrosulfate fusion dissolve condensed phosphates p-GPC No data No data EMMI 2000c, 2000d... 

FOM fermentable organic matter in the rumen, in g/kg dry matter, where FOM = digestible organic matter - ether extract - non degradable crude protein (a priori CP X (I - NED))... 

These relationships use the following abbreviations CF (crude fibre), CP (crude protein), CC (cytoplasmic carbohydrates, i.e. starch and sugars), OM (organic matter) and DOM (digestible organic matter), all expressed in % dry matter. DE is the digestible energy expressed in MJ/kg dry matter. 

Sludge Solid matter remaining from water treatment that contains aerobic organisms that digest organic matter. 

A measure that is often used to reflect the energy concentration of foods is the concentration of digestible organic matter in the dry matter (DOMD). For the hay in Box 10.1 this is 515 g/kg DM, or 51.5 per cent. This percentage figure is often referred to as the D value. 

An alternative approach to chemical analysis is to estimate digestibility by in vitro fermentation (see p. 241) and predict the energy value from the digestible organic matter content of the food. For forages given to ruminants, the following equation is often used ... 

Digestible organic matter as a percentage of the dry matter (in vitro). 

The following equation is typical of the type of relationship with digestible organic matter in dry matter (DOMD), which is used for calculating metabolisable energy ... 

There is general acceptance of dry matter, digestible organic matter and ammonia nitrogen as the major determinants of silage dry matter intake, and it behoves the silage maker to optimise fermentation and to minimise secondary fermentation, clostridial activity and aerobic deterioration if satisfactory intakes of the product are to be achieved. 

Cereal Processing Liveweight gain (g/day) Feed conversion efficiency (kg feed/kg gain) Digestibility Organic matter Nitrogen ... 

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