This study was carried out to determine the dietary supplementation of organic zinc on feed intake (FI), conversion ratio (FCR), egg production (EP), mass (EM) and quality. A total 120 ISA-Brown layers aged 20 weeks were used in this study. Hens distributed randomly four treatments (30 hens each) with three replicates. The supplemented into basal diet at different concentrations as follows; (T1...

A study was conducted to test the effects of dietary energy intake on reproduction in genetically similar broiler breeder males and on the subsequent growth of their progeny. Fifty-nine 1-d-old pedigree broiler breeder male chicks were raised to breeding age. At 33 wk of age, 33 males were chosen and placed in one of three groups of 11 males per group and fed either 370, 330, or 290 kcal per bi...

Studies have demonstrated that obesity and osteoporosis are linked disorders in humans. This study examined the hypothesis that excessive lipid consumption affects bone metabolism in laying hens. A total of one hundred 63-wk-old laying hens were randomly divided into 2 treatments and fed either a regular layer diet (control) or a high energy and low protein diet (HE-LP; experimental treatment) ...

OBJECTIVE An experiment was conducted to determine the effect of superdosing phytase on productive performance and egg quality in laying hens. METHODS A total of 200 42-wk-old Hy-Line Brown laying hens were allotted into 1 of 5 dietary treatments with 5 replicates consisting of 8 hens per replicate. The positive control (PC) and negative control diets (NC) were prepared based on the recommend...

It is well established that the use of alfalfa in diets for monogastric animals is limited by its high fiber content. However, alfalfa is a natural source of xanthophylls and gives poultry products a desirably yellow color. In addition, alfalfa saponins may contribute to reduce the levels of cholesterol in the meat and egg yolk. We have investigated the potential utilization of β-glucanases and...

The Impact of Supplemental L-Threonine in Laying Hen Diets on Egg Component Yield, Composition, and Functionality. (August 2005) Paige Reynolds Niemeyer, B.S., Texas A&M University; M.S., Texas A&M University Chair of Advisory Committee: Dr. John Carey The impacts of supplemental L-threonine in laying hen diets were evaluated. Over three experiments, control hens were fed a corn-soybean commerc...

The objective of this study was to investigate the effect of dietary protein levels on pullet development and egg production performance of local hens. One hundred sixty local chicken pullets were used in this study. During the rearing period, the pullets were divided randomly at a density of 16 chicks per cage in rearing pens. During week 1, all birds were fed a starter diet containing 19% cru...

Feed deprivation is used in the layer industry to induce molting and stimulate multiple egg-laying cycles in laying hens. Unfortunately, the stress involved increases susceptibility to Salmonella enteritidis (SE), the risk of SE-positive eggs, and incidence of SE in internal organs. Leghorn hens over 50 wk of age were divided into 4 treatment groups of 12 hens each in experiment 1 and 3 treatme...