Intermittent Watering and Feeding Programs for White Leghorn Layers
نویسندگان
چکیده
منابع مشابه
Group size and density effects on physical indices and cell-mediated immunity in two genetic lines of white leghorn layers.
Social stress resulting from varied group sizes with density in caging systems is a common problem that affects bird welfare in the poultry industry in the United States. To examine whether there is a genetic basis for variations in response to group size and density, 2 genetic strains of White Leghorn hens were used in this study: HGPS, a line selected for high group productivity and survivabi...
متن کاملEffects of Levels of Inclusion of Locally Processed Fish Waste Meal in the Diets of White Leghorn Layers on Performance Parameters, Hatchability, Economics, Egg Production and Egg Quality
The study was conducted at Haramaya university poultry farm to evaluate the effects of locally processed fish waste meal (FWM) in the diet of white leghorn layers on the performance and hatchability, egg quality, sensory flavor and profitability of the rations. One hundred eighty chickens at five months of age were randomly distributed (15 layers per each 12 pens). The pens were randomly assign...
متن کاملEffect of several dermatitis preventing agents on foot pad dermatitis in dwarf and normal sized single comb white Leghorn layers.
Studies were conducted to determine the effects of increased dietary levels of vitamin and trace mineral mixtures, methionine, meat and bone meal, fish meal, and safflower oil on foot pad dermatitis in dwarf and normal size Single Comb White Leghorn layers. All layers were maintained in individual wire cages throughout a 40-week experiment period. Individual birds were scored for the incidence ...
متن کاملChanges in Concentrations of Various Blood Plasma Parameters and Hormones as Influenced by Induced Molt in White Leghorn Layers
Spent layers of 128 weeks age from a White Leghorn (Babcock) layer tlock were induced to molt by withdrawal of feed for 14 days. The birds lost approximately 29.64% of their body weight. The blood samples were collected at pre-molt, post-molt and peak production stages. Maximum concentrations of cholesterol and glucose were observed at pre-molt and minimum at post-molt stage. Urea, protein and ...
متن کاملEffects of social disruption on physical parameters, corticosterone concentrations, and immune system in two genetic lines of White Leghorn layers.
Farm management practices such as increasing group size and mixing of unfamiliar chickens may cause social disruption and affect bird well-being. To examine genetic-associated physical and physiological differences in response to social disruption, 2 strains of White Leghorn hens were used in the study [i.e., HGPS (line selected for high group production and survivability) and DXL (DeKalb XL co...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1976
ISSN: 0032-5791
DOI: 10.3382/ps.0551871