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Effect of dietary magnesium,calcium,phosphorus,and limestone grain size on productive performance and eggshell quality of hens
magnesium oxide limestone granularity mixed feed Ca : NPP ratio egg shell strength layers
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2016/11/11
Two experiments conducted on laying hens, aged 50 and 52 weeks, were carried out to evaluate the effect of dietary Mg and its relationship to the Ca : NPP (non-phytate phosphorus) ratio using a variou...
Effects of Dietary Calcium Levels on Productive Performance, Eggshell Quality and Overall Calcium Status in Aged Laying Hens
Dietary Calcium Levels Cracked Eggs Eggshell Strength Tibial Breaking Strength
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2016/11/10
This study was conducted to investigate the effects of diets with varying levels of calcium on egg production, shell quality and overall calcium status in aged laying hens. A total of five hundred 70-...
Effects of phytase B on laying performance, eggshell quality and on phosphorus and calcium balance in laying hens fed phosphorus-deficient maize-soybean meal diets
phytase B laying hen laying performance eggshell quality retention of P and Ca
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2015/6/9
A study was conducted to evaluate the effects of dietary supplementation of phytase B (product of the Aspergillus niger phyB gene expressed in Trichoderma reesei) on feed intake, laying performance, e...
Eggshell quality and calcium utilization in feed of hens in repeated laying cycles
laying hens forced moulting repeated laying cycle eggshell quality calcium
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2015/6/8
Hens of the laying hybrid Shaver Starcross 288 were used in two consequential experiments. The first experiment (for 10 months) was conducted on hens at the age from 18 to 60 weeks (1st cycle; n = 50)...
Laying performance and eggshell quality in laying hens fed diets supplemented with prebiotics and organic acids
laying hens egg production eggshell quality organic acids prebiotic fructans
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2015/6/8
The aim of the study was to evaluate the effect of organic acids and the prebiotic fructans on egg production and eggshell quality when added to the layer diet with different levels of calcium and pho...
Effect of housing system on the calcium requirement of laying hens and on eggshell quality
enriched cage unenriched cage floor system eggshell production Ca requirement
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2015/6/5
The effects of housing systems on the calcium requirement for eggshell production, eggshell quality and on the breaking strength of the hen’s tibia were evaluated. Unenriched cages (UN) (24 laying hen...
The effects of a higher amount of iodine supplement on the efficiency of laying hens fed extruded rapeseed and on eggshell quality
egg mass feed:egg mass ratio
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2015/6/1
The objective of this experiment was to study the effects of feeding 6.07 mg/kg of iodine in comparison with 3.57 mg/kg of iodine as a supplement in diets with different levels of extruded rapeseed (4...
Effects of Dietary Corticosterone on Yolk Colors and Eggshell Quality in Laying Hens
Laying Hens Egg Quality Stress Corticosterone Yolk Colors Shell Thickness
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2016/5/18
The objective of this study was to investigate the effects of dietary corticosterone on egg quality. For 2 weeks hens received either control or experimental diet containing corticosterone at 30 mg/kg...