A model of energy and nitrogen utilisation by cattle

Graham, Maggie

doi:10.1016/0308-521x(81)90050-0

Cited by 1 publication

(1 citation statement)

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“…It is concluded that the term 0.1 ME p from equation 1.19 should be used in calculating ME requirements for milk production, as shown in the examples in Table 1.15 where the inclusions of 14 (housed cow) and 1.1 (housed sheep) MJ/d of ME represent increases in the maintenance metabolism of 25 and 17% respectively. In simulations of growth and production in sheep (Graham et al 1976) and cattle (Graham 1981) allowance has been made for an increase in the maintenance metabolism during lactation of up to 30%. Similarly, the term 0.09 MEI (equation 1.20) is used in the calculations for estimating milk production from a predicted MEI.…”

Section: Me Requirements For Milk Productionmentioning

confidence: 99%

Nutrient Requirements of Domesticated Ruminants

Freer¹,

Dove²,

Nolan³

2007

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Nutrient Requirements of Domesticated Ruminants draws on the most up-to-date research on the energy, protein, mineral, vitamin and water requirements of beef and dairy cattle, sheep and goats. It defines the responses of animals, in weight change, milk production and wool growth, to quantitative and qualitative changes in their feed supply. It has particular application to grazing animals. Factors affecting the intake of feed are taken into account and recommendations are given according to the production systems being used; for instance, the feed intake of a grazing animal is affected by a larger number of variables than a housed animal. Examples of the estimation of the energy and nutrients required for the different production systems are given, as well as the production expected from predicted feed intakes. The interactions between the grazing animal, the pasture and any supplementary feeds are complex, involving herbage availability, diet selection and substitution. To facilitate the application of these recommendations to particular grazing situations, readers are directed to decision support tools and spreadsheet programs. Nutrient Requirements of Domesticated Ruminants is based on the benchmark publication, Feeding Standards for Australian Livestock: Ruminants, published in 1990 by CSIRO Publishing on behalf of the Standing Committee on Agriculture. It provides comprehensive and useful information for graziers, livestock advisors, veterinarians, feed manufacturers and animal nutrition researchers. The recommendations described are equally applicable to animals in feedlots or drought yards.

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Section: Me Requirements For Milk Productionmentioning

confidence: 99%