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CAB eBooks

Ebooks on agriculture and the applied life sciences from CAB International

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CABI Book Chapter Info
Cover for Modelling production and portal appearance of volatile fatty acids in dairy cows.

Values of stoichiometric coefficients were estimated to describe the production of volatile fatty acids (VFA) from fermented substrate in the rumen of lactating cows. Coefficient estimates were derived by regression of in vivo data of rumen digestion to a stoichiometric model with non-linear...

Author(s)
Bannink, A.; Kogut, J.; Dijkstra, J.; France, J.; Tamminga, S.; Vuuren, A. M. van
ISBN
2000 CABI (H ISBN 9780851994499)
Type
Book chapter
CABI Book Chapter Info
Cover for Whole-animal models.

This chapter describes compartmental models which simulate whole-animal function. The animals considered are the veal calf, the lactating dairy cow, the pig and the lactating sow. Essentially, the models are expressions of the rate:state formalism, but, as in the previous chapter, they are...

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter
CABI Book Chapter Info
Cover for Animal products.

In this chapter, equations for milk yield from dairy cows are discussed, followed by energy utilization efficiency for milk production. The next two sections focus on meat production, body composition and allometry, leading to considerations of growth efficiency. Egg production and the amino acid...

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter
CABI Book Chapter Info
Cover for Simulation of rumen particle dynamics using a non-steady state model of rumen digestion and nutrient availability in dairy cows fed sugarcane.

An extant dynamic model of digestion and absorption of nutrients in cattle fed sugarcane was adapted for non-steady state feeding conditions. This modified model includes mechanisms of particle size reduction and delay in availability of particles and intracellular contents for microbial...

Author(s)
Collao-Saenz, E. A.; Bannink, A.; Kebreab, E.; France, J.; Dijkstra, J.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Production efficiency of ruminants: feed, nitrogen and methane.

This chapter discusses the production efficiency of ruminants, particularly cattle, in relation to feeds, nitrogen excretion and methane emission. Focus is given on the production efficiency of cattle, primarily that of dairy cattle, at the animal level. Improvements in production efficiency are...

Author(s)
Dijkstra, J.; France, J.; Ellis, J. L.; Strathe, A. B.; Kebreab, E.; Bannink, A.
ISBN
2013 CABI (H ISBN 9781780640426)
Type
Book chapter
CABI Book Chapter Info
Cover for Linear models of nitrogen utilization in dairy cows.

Linear models describing relationships between nitrogen (N) intake and N output were constructed based on N-balance data from experiments conducted at the Centre for Dairy Research (CEDAR). The models were then applied to a second set of data derived from a series of N-balance experiments conducted ...

Author(s)
Kebreab, E.; Allison, R.; Mansbridge, R.; Beever, D. E.; France, J.
ISBN
2000 CABI (H ISBN 9780851994499)
Type
Book chapter
CABI Book Chapter Info
Cover for Estimating the risk of hypomagnesaemic tetany in dairy herds.

A model of magnesium dynamics in sheep has been adapted and improved as part of a programme to develop a tool that will assist dairy farmers to assess the risk of animals in a milking herd suffering from hypomagnesaemic tetany. The terms in the model for hindgut absorption have been altered to...

Author(s)
Bell, S. T.; McKinnon, A. E.; Sykes, A. R.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Segmented, constrained, non-linear, multi-objective, dynamic optimization methodology applied to the dairy cow ration formulation problem.

In the last meeting of this series of modelling workshops we reported on the development of an optimization scheme for dealing with dairy cow ration formulation, in an optimal way, in the situation where constraints were both non-linear and discontinuous in their arguments. Indeed, we illustrated...

Author(s)
Boston, R. C.; Hanigan, M. D.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Metabolic control: improvement of a dynamic model of lactational metabolism in early lactation.

A mechanistic, dynamic model of metabolism exists to allow testing of complex hypotheses on nutrient metabolism of the dairy cow. The model describes protein synthesis and degradation in the viscera and muscle, lipogenesis and lipolysis in the adipose tissue, and milk synthesis. It is dynamic,...

Author(s)
McNamara, J. P.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for A composite model of growth, pregnancy and lactation.

Mathematical models of pre- and postnatal growth, pregnancy and lactation were combined and implemented using object-orientated computer code to form an energy-based model of a dairy cow. Each simulated cow 'grows', can have a computer pregnancy with multiple offspring, growing its fetuses to term, ...

Author(s)
Vetharaniam, I.; Davis, S. R.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper

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