搜索结果: 1-10 共查到“养禽学 Laying Hens”相关记录10条 . 查询时间(0.038 秒)
Bones quality indices in laying hens fed diets with a high level of DDGS and supplemented with selected feed additives
layers distillers dried gains with solubles feed supplements
2015/7/3
An experiment with 192 caged ISA Brown laying hens, fed a diet containing a high level of corn distillers dried grains with solubles (DDGS), was conducted to determine the influence of selected feed a...
Effects of feed supplementation with manganese from its different sources on performance and egg parameters of laying hens
manganese chelates layers egg quality
2015/7/3
The objective of this study was to compare the effects of feed supplementation of laying hens with manganese from its inorganic and organic sources on performance and some parameters of egg quality. N...
Effects of laying hens housing system on laying performance, egg quality characteristics, and egg microbial contamination
cage aviary litter egg production
2015/7/2
The objective of this study was to compare the performance, egg quality, and microbial contamination of egg shells from hens maintained in different housing systems, such as conventional and enriched ...
Investigation of the effect of probiotics and potentiated probiotics on productivity of laying hens
laying hen probiotic potentiated probiotic
2015/6/8
Probiotic bacteria are used to balance a disturbed intestinal microflora and dysfunctions of the gastrointestinal tract (GIT). They could be an effective alternative to the use of synthetic substances...
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
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 different phosphorus levels on the performance and egg quality of laying hens fed wheat- and maize-based diets
available phosphorus brown-egg laying hen wheat maize
2015/6/8
The effects of diet type (wheat- or maize-based) and concentration of available phosphorus (AP; about 4, 3 and 2 g/kg) on the parameters of hen performance and egg quality as well as shell calcium (Ca...
The effect of digitonin on egg quality, cholesterol content in eggs, biochemical and haematological parameters in laying hens
digitonin egg weight lipid metabolism egg cholesterol blood picture
2015/6/5
The aim of the present study was to describe the effect of digitonin on egg quality, cholesterol content in eggs, some parameters of serum lipid metabolism and blood picture of laying hens. The experi...
Heritability of egg production in laying hens under cumulative, multitrait and repeated measurement animal models
egg production laying hens cumulative model monthly records
2015/6/4
Six generations of three layer lines (13 770 recorded individuals of A22 line, 13 950 of A88, 9 351 of K66) were used to estimate genetic effects on egg production under cumulative, multitrait and rep...
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
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...
Influence of Natural Zeolite on Performance of Laying Hens and Egg Quality
Natural Zeolite Hens Egg Quality
2009/1/23
This experiment was conducted to study the effects of natural zeolite on the performance of laying hens. One hundred and eighty 37-week-old Babcock B-300 hens were fed with a diet containing 0, 20, 4...