Modelling Nutrient Utilization in Farm Animals

This book describes current research in modelling nutrient use in farm animals, from cellular to ecosystem level. The chapters are developed from papers presented at a satellite meeting of the ninth International Symposium on Ruminant Physiology, held in South Africa in October 1999.

Contributors

ix

Preface

xiii

Introduction: History and Future of Modelling Nutrient Utilization in Farm Animals

1

(10)

R.L. Baldwin

Session 1: Ruminal Metabolism

D.E. Beever

J. France

J. P. McNamara

The Role of Thermodynamic in Controlling Rumen Metabolism

11

(14)

R.A. Kohn

R.C. Boston

Modelling Lipid Metabolism in the Rumen

25

(12)

J. Dijkstra

W.J.J. Gerrits

A. Bannink

J. France

Towards a More Accurate Representation of Fermentation in Mathematical Models of the Rumen

37

(12)

B.N. Nagorcka

G.L.R. Gordon

R.A. Dynes

Simple Allometric Models to Predict Rumen Feed Passage Rate in Domestic Ruminants

49

(14)

A. Cannas

P.J. Van Soest

Ruminal Metabolism of Buffer-soluble Proteins, Peptides and Amino Acids In Vitro

63

(10)

P. Uden

Session 2: Absorption and Metabolism

R.A. Kohn

Models to Interpret Degradation Profiles Obtained from In Vitro and In Situ Incubation of Ruminant Feeds

73

(14)

S. Lopez

J. France

J. Dijkstra

M.S. Dhanoa

Modelling Production and Portal Appearance of Volatile Fatty Acids in Dairy Cows

87

(16)

A. Bannink

J. Kogut

J. Dijkstra

J. France

S. Tamminga

A.M. van Vuuren

Modelling Energy Expenditure in Pigs

103

(12)

J. van Milgen

J. Noblet

Aspects of Modelling Kidney Dynamics

115

(12)

B. Robson

M. Vlieg

Evaluation of a Representation of the Limiting Amino Acid Theory for Milk Protein Synthesis

127

(18)

M.D. Hanigan

J. France

L.A. Crompton

B.J. Bequette

Multiple-entry Urea Kinetic Model: Effects of Incomplete Data Collection

145

(18)

G. Zuur

K. Russell

G.E. Lobley

Session 3: Growth and Development

D. Sauvant

Evaluation of a Growth Model of Preruminant Calves and Modifications to Simulate Short-term Responses to Changes in Protein Intake

163

(12)

W.J.J. Gerrits

P.L. van der Togt

J. Dijkstra

J. France

Simulation of the Development of Adipose Tissue in Beef Cattle

175

(8)

R.D. Sainz

E. Hasting

A Simple Nutrient-based Production Model for the Growing Pig

183

(14)

S. Boisen

Second-generation Dynamic Cattle Growth and Composition Models

197

(14)

J.W. Oltjen

A.B. Pleasants

T.K. Soboleva

V. H. Oddy

Modelling Interactions Between Cow Milk Yield and Growth of its Suckling Calf

211

(16)

F. Blanc

J. Agabriel

P. Sabatier

A Mechanistic Dynamic Model of Beef Cattle Growth

227

(14)

T. Hoch

J. Agabriel

Session 4: Ruminant Production in Various Situations

R.C. Boston

Modelling Nutrient Utilization in Growing Cattle Subjected to Short or Long Periods of Moderate to Severe Undernutrition

241

(12)

G.Q. Witten

F.D. Richardson

An Integrated Cattle and Crop Production Model to Develop Whole-farm Nutrient Management Plans

253

(10)

T.P. Tylutki

D.G. Fox

Modelling Nutrient Utilization by Livestock Grazing Semiarid Rangeland

263

(18)

F.D. Richardson

B.D. Hahn

S.J. Schoeman

Using the Cornell Net Carbohydrate and Protein System Model to Evaluate the Effects of Variation in Maize Silage Quality on a Dairy Farm

281

(8)

T.P. Tylutki

D.G. Fox

M. McMahon

P. McMahon

Session 5: Nutrient Metabolism

J. Dijkstra

Challenge and Improvement of a Model of Post-absorptive Metabolism in Dairy Cattle

289

(14)

J.P. McNamara

G.J. Phillips

A Rodent Model of Protein Turnover to Determine Protein Synthesis, Amino Acid Channelling and Recycling Rates in Tissues

303

(14)

H.A. Johnson

R.L. Baldwin

C.C. Calvert

Modelling Relationships Between Homoeorhetic and Homoeostatic Control of Metabolism: Application to Growing Pigs

317

(12)

D. Sauvant

P.A. Lovatto

Model for the Interpretation of the Energy Metabolism in Farm Animals

329

(18)

A. Chudy

Linear Models of Nitrogen Utilization in Dairy Cows

347

(6)

E. Kebreab

R. Allison

R. Mansbridge

D.E. Beever

J. France

Isotope Dilution Models for Partitioning Amino Acid Uptake by the Liver, Mammary Gland and Hindlimb Tissues of Ruminants

353

(8)

L.A. Crompton

J. France

B.J. Bequette

J.A. Maas

M.D. Hanigan

M.A. Lomax

J. Dijkstra

Session 6: Production and Evaluation Models

J.P. McNamara

The Conversion of a Scientific Model Describing Dairy Cow Nutrition and Production to an Industry Tool: the CPM Dairy Project

361

(18)

R.C. Boston

D.G. Fox

C. Sniffen

E. Janczewski

R. Munson

W. Chalupa

The Utilization of Prediction Models to Optimize Farm Animal Production Systems: the Case of a Growing Pig Model

379

(14)

P. Jean dit Bailleul

J.F. Bernier

J. van Milgen

D. Sauvant

C. Pomar

A Pig Model for Feed Evaluation

393

(16)

A. Danfoer

Index

409

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Modelling Nutrient Utilization in Farm Animals

Summary

Table of Contents

Supplemental Materials

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Modelling Nutrient Utilization in Farm Animals

Summary

Table of Contents

Supplemental Materials

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