Feed into Milk: A New Applied Feeding System for Dairy Cows

Live weight gain Live weight loss Pregnancy Maintenance and milk production Activity allowance Total requirement Calculation of ME supply Evaluating the FiM energy system Conclusions 3. PROTEIN REQUIREMENT AND SUPPLY Background Protein requirements Background and principles Calculation of MP FiM requirements Requirements for maintenance and endogenous loss Requirement for preganancy, milk and body weight change MP FiM requirement vi Protein supply Background and principles Framework for the supply of MP FiM Degradation of DM and Nitrogen Outflow rates and the estimation of the effective degradabilities of DM (eddm) and N (edn) The yield of ATP Calculation of MP FiM supply Fractional outflow rates ATP supply and its utilisation for the potential supply of MCP Supply of effective degradable N from each feed Undegradable protein Total diet MP supply Evaluation of MP FiM Microbial efficiency Evaluation of the whole MP FiM system Use in practice for linear programming of feed compounds Conclusions 4. DECISION SUPPORT SYSTEMS Rumen stability Background Principles and methods Calculation of the Requirement and Supply of RSV Requirement for RSV RSV supply RSV balance The interpretation of RSV balances Amino acids Background and principles Calculation of supply and threshold levels for an expected response Supply Corrections to relate predictions to observed supply Threshold values Assessment of adequacy of supply Milk Composition Background Principles and methods Database vii Model construction 50 Calculation of response indices 52 Evaluation of the DSS 53 Interpretation of response 55 Conclusions 57 5. SUMMARY OF FEED CHARACTERISATION METHODS Intake and metabolisable energy Metabolisable protein Rumen stability value On the enclosed CD-rom, you will find a complete copy of this book in PDF format, as well as the following: FiM model equations in software-compatible form with glossary of terms A guide to using the FiM model Using the rumen stability DSS Using the amino acid DSS Using the milk quality DSS Feed Data Base viii ix