the present research was designed to examine the genetic analysis of egg weight, egg yolk weight and egg albumen weight of bovan neva black laying hens at 25, 51 and 72 weeks. for this purpose, thirty birds were selected from the layer flock in the babcock university teaching and research farm. they were individually housed in separate labeled battery cage. a total of thirty eggs were collected...

At present the laying hen rearing is transformed into alternative housing systems which include a deep litter system. As for the poultry nutrition, the replacement of animal protein with vegetable protein in poultry feed is applied. Therefore, in an experiment we evaluated the quality of eggs from laying hens in the cage system as compared to the deep litter system with vegetable protein substi...

A 294-day study was conducted to determine the effects of organic and inorganic copper (Cu) sources on laying performance, blood and yolk cholesterol and Cu accumulation in the yolk of laying hens. 480 Kabir® laying hens (20 weeks old) reared for 294 days in three phases (early, mid and late lay) were used. They were randomly allocated to six dietary groups of 80 birds split into four replicate...

Background: This study was conducted to investigate the effects of natural and synthetic sources lycopene on performance, egg quality some blood characteristics Japanese quail layers. Methods: The 252 eight-week-old hens were randomly divided into seven treatments with three replication. first treatment fed basal diet (control). Second third given diets containing tomato fruit powder (TOM) at a...

this experiment was conducted to evaluate the effects of different levels of costmary(tanacetum balsamita)medicinal plant on performance, egg traits, and blood biochemical parameters of laying hens. hundred-eighty of hi-line laying hens (w 36) from 46 until 58 weeks of age were used in a completely randomized design in five treatments and three replicates (12 birds per replicate). the treatment...

Carotenoids are partially responsible for the colors of plants and when consumed by humans and animals are deposited into tissues (e.g., skin and egg yolk in laying hens) and may have health benefits. Because carotenoids are more available when consumed from egg yolk sources than vegetables, this research examined the ability of the laying hen to deposit dietary lycopene, a carotenoid that impa...

AIM The aim was to study the effect of supplementation of lysine producing microbes (LPM) as an in vivo source of lysine on performance and egg quality characters of post-peak layers. MATERIALS AND METHODS BIS (1992) specified diets (except crude protein [CP] and lysine) were prepared using either soybean meal (SBM) or groundnut extractions (GNE) or sunflower extractions (SFE) with 16 and 15%...

Natural and chemical colorants are attracting a lot of attention as sustainable feed additives due to their effect on food color because presentation matters consumers. Color also is major sensory factor that helps consumers determine quality its possible health benefits. For example, highly colored egg yolks can only come from healthy laying hens fed well-balanced, nutrient-rich diet. Consumer...

The purpose of this study was to determine the dietary effects fruit pulps (dried tomato, apple and grape) on performance egg quality characteristics laying hens. In trial, 196 Lohmann sandy layers 25 weeks age were distributed into four groups with seven replicates for 9 weeks. Trial fed following diets, control group basal diet (no additive), 4 % dried tomato pulp, 4% pulp 2.5% grape pulp. Fe...