Protein and Energy Interrelationships for Laying Hens
نویسندگان
چکیده
منابع مشابه
Protein and Energy Requirements of Laying Hens and Broiler Breeders
Layer and Breeder rations are still evaluated, as a rule, on the basis of their protein content, expressed as "percent protein". This is the easiest and most practical criterion, but unfortunately it is a relative measure, depending on general feed consumption. The latter hardly relates to the productive traits of the hen, being dependent primarily on the energy content of the feed and on the e...
متن کاملModeling Energy Utilization in Broiler Breeders, Laying Hens and Broilers
The factorial approach has been used to partition the energy requirements into maintenance, growth, and production. The coefficients determined for these purposes can be used to elaborate energy requirement models. These models consider the body weight, weight gain, egg production, and environmental temperature to determine the energy requirements for poultry. Predicting daily energy requiremen...
متن کاملEffect of Methionine and Energy Level in High Protein Organic Diets Fed to Laying Hens*
The objective of a 2 × 2 factorial study with laying hens was to evaluate the effect of dietary energy and DL-methionine (Met) supplementation in a high protein but sulphur amino acid deficient organic diet for laying hens on egg production, egg quality, and N retention and N excretion in manure. The model trial was conducted with 72 Bovans Brown hens from 24 to 53 weeks of age, allocated to 4 ...
متن کاملModulation of energy and protein supplies in sequential feeding in laying hens
Sequential feeding (SF) consists of splitting energy (E) and protein/calcium (P) fractions temporally, improving the feed conversion ratio (FCR) of hens compared with a continuous distribution during the day. In a previous study, the E fraction (with a low level of protein) was provided in the morning, whereas the P fraction (with low level of energy) was given in the afternoon. However, there ...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1965
ISSN: 0032-5791
DOI: 10.3382/ps.0440753