Amino Acid Recommendations for laying hens
During recent decades productivity of laying hens increased substantially (Elliot, 2008). Not only egg number, egg mass, and feed conversion has increased but also persistency of lay has improved. As such, this must have implications on the optimal amino acid nutrition of current laying hen strains. Simply stated, increasing egg mass output per hen means an increased amino acid output which has to be provided by the feed. Moreover, while performance criteria of laying hens have improved, body weight has decreased (Elliot, 2008). Consequently, the amino acid requirement for maintenance purposes is influenced. In addition to the quantitative demands for amino acids by the modern laying hen changing, there also is the potential that the qualitative demands for dietary protein might have changed as optimum amino acid composition for egg production differs from that for maintenance.
Substitution of soybean with canola meal in laying hens diets formulated based on total and digestible amino acids on performance and blood parameters
An experiment was conducted to study the effects of substitution soybean meal (SBM) with canola meal (CM) and formulated diets based on total and digestible amino acid on performance, egg quality, organs weight and blood parameters of laying hens from 73 to 83 weeks of age. A total of 128 laying hens were distributed by completely randomized design in a 2×2 factorial arrangement with 2 protein ...متن کامل
Response of laying hens to supplementation with various fatty acids when fed diets inadequate in protein and sulphur amino acids
The Effect of Prebiotic and Types of Feed Formulation on Performance, Intestinal Microflora and Cecum Gas Production of Laying Hens
In this experiment, the effect of prebiotic Bio-Mos® (MOS) and types of feed formulation (total and digestible amino acids) were evaluated on performance and the small intestine microflora in laying hens for a duration of 10 wks. A total of 168 Hy line W-36 laying hens, with an initial age of 73 wks, were randomly allocated to 4 dietary treatments, 7 replicates and 6 birds in each replicate. Th...متن کامل
Influence of caecectomy and source of dietary fibre or starch on excretion of endogenous amino acids by laying hens.
Two experiments were conducted to evaluate the effects of caecectomy and source of dietary fibre and starch on excretion of amino acids by laying hens. In Expt 1, caecectomized hens excreted significantly higher levels of several amino acids than intact hens during a 24 h fasting period. These differences were greatest for threonine, proline and leucine. In Expt 2, caecectomized and intact hens...متن کامل