Studies in Mineral Nutrition of Laying Hens
نویسندگان
چکیده
منابع مشابه
Nutrition/Mortality Interactions in Laying Hens
A laying trial compared two Australian egg laying strains with an imported brown egg layer. They were fed a high quality diet recommended for the imported bird or a good Australian layer diet. In addition, these two diets were fed in a free-choice system whole wheat, protein concentrate and limestone chips. The birds throughout received standard husbandry regarding vaccinations and lighting. Al...
متن کاملEffect of Different Levels of Mineral and Vitamin Premix on Laying Hens Performance during the First Laying Phase
An experiment was conducted to evaluate the effects of different levels of mineral and vitamin premix on performance and egg traits of laying hens from 37 to 49 weeks of age. Two hundred and forty laying hens (Hy-Line W-36 strain) were randomly assigned to 5 dietary treatments of four replicates each with 12 hens per replicate). The levels of mineral and vitamin premixes in the experiment were ...
متن کاملErysipelothrix rhusiopathiae in Laying Hens
The bacterium Erysipelothrix rhusiopathiae can infect a wide range of mammals (including humans) and birds. Disease outbreaks (erysipelas) have been considered unusual in chickens internationally, but outbreaks with high mortality and egg production losses have been diagnosed in Swedish laying hen flocks every year since 1998. Different aspects of E. rhusiopathiae infection in chickens were exa...
متن کاملComparative gonadotrophic potency of anterior pituitaries from cocks, laying hens and non-laying hens in molt.
A bulk of studies on the assay of gonadotrophic hormone content of the anterior pituitary from the animals in various reproductive conditions has been done. Riley and Fraps(1942b) assayed pituitary glands from chickens in various reproductive stages, judging the gonadotrophic potency by the increment of uterine weights of immature mice, and concluded that glands from non-laying hens produced a ...
متن کاملEffects of clofibrate treatment in laying hens.
Expression of peroxisome proliferator-activated receptor-alpha (PPARalpha) has been shown in liver of chicks, but effects of its activation have not yet been investigated. In this study, laying hens were treated with clofibrate, a synthetic PPARalpha agonist, to investigate the effects of PPARalpha activation on liver lipid metabolism. Hens receiving a diet containing 5 g of clofibrate/kg had a...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1942
ISSN: 0032-5791
DOI: 10.3382/ps.0210321