Forage crops are the staple ingredients of dietary rations fed to ruminant animals. They provide the animal with a large source of dietary fiber, critical for normal functioning of the rumen and its associated microenvironment (Driehuis and Oude Elferink, 2000). The preservation of forage crops into a fermented feedstuff known as silage has been an important practice in agriculture, especially ...

Th e aim of that review is to present the principles of energy evaluation systems used in pig feeding and to stress out some key consideration when introducing Net Energy (NE) systems and some areas of future research. Based on the relevant literature data it can be stated that despite the mentioned shortcomings of the currently used energy systems, we have to admit that NE and/or Potential Phy...

Phosphorus absorption in ruminants was analysed from a database described in a previous article. For common values of ingested phosphorus (2.5-5.0 g x kg(-1) of DM), 0.73 of dietary phosphorus is absorbed. The remaining variability is probably due to phosphorus quality. Phosphorus absorbed from silage, cereal, cereal by-products and hay differs greatly. The current true absorption coefficient u...

Introduction The production of ethanol from corn grain has become an effective strategy to produce high quality and clean liquid transportation fuels. In fact, the growth of the U.S ethanol industry has provided an economic stimulus for U.S.-based agriculture. The feed industry plays an integral role in the ethanol production industry. For example, the primary product of the dry milling product...

The major consideration in this paper is the suitability of a metabolizable energy system for pigs. For poultry there is no practical alternative since urine and faeces are voided conjointly. The correction to digestible energy of a feedstuff for energy in urine is usually small, but there are circumstances when this may be large. Furthermore there are insufficient data on metabolizable energy ...