scholarly journals Effects of Chito-oligosaccharide Supplementation on Egg Production, Nutrient Digestibility, Egg Quality and Blood Profiles in Laying Hens

2010 ◽  
Vol 23 (11) ◽  
pp. 1476-1481 ◽  
Author(s):  
Q. W. Meng ◽  
L. Yan ◽  
X. Ao ◽  
H. D. Jang ◽  
J. H. Cho ◽  
...  
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Nutrient Digestibility ◽  
Blood Profiles

Effects of dietary Bacillus subtilis RX7 and B2A supplementation on productive performance, egg quality, blood profiles, and excreta Salmonella counts in laying hens

2020 ◽  
Vol 100 (3) ◽  
pp. 411-417
Author(s):  
Huan Shi ◽  
Wan Lin Zhang ◽  
In Ho Kim
Keyword(s):  
Bacillus Subtilis ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Basal Diet ◽  
Productive Performance ◽  
Blood Profile ◽  
Colony Forming Units ◽  
Dietary Treatments ◽  
Blood Profiles

An experiment was carried out to investigate the effect of Bacillus subtilis RX7 and B2A supplementation on egg production, egg quality, blood profile, and excreta Salmonella population in laying hens. A total of 192 Hy-Line Brown laying hens (40-wk-old) were randomly assigned into four dietary treatments, each of which was replicated eight times with six hens per replicate in a 5 wk trial. The dietary treatments were NC, which is a basal diet without antibiotics or Bacillus subtilis; PC, which is an NC + 0.5 g kg−1 antibiotic (virginiamycin) diet; BSR, which is an NC + 0.5 g kg−1 Bacillus subtilis RX7 (1.0 × 109 colony forming units g−1); and BSB, which is an NC + 0.5 g kg−1 Bacillus subtilis B2A (1.0 × 109 colony forming units g−1). The results showed that hens receiving BSB diets had increased (P < 0.05) eggshell thickness over hens fed the NC, PC, and BSR diets (week 3). The excreta Salmonella counts in the PC, BSR, and BSB groups were lower than the NC group (P < 0.05). These results indicate that dietary inclusion of Bacillus subtilis RX7 and B2A strains effectively decreased excreta Salmonella counts without any detrimental effects on the performance of laying hens.

scholarly journals The Response of Layer Hen Productivity and Egg Quality to an Additional Limestone Source when Offered Diets Differing in Calcium Concentrations and the Inclusion of Phytase

Animals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2991
Author(s):  
Isabelle Ruhnke ◽  
Yeasmin Akter ◽  
Terence Zimazile Sibanda ◽  
Aaron J. Cowieson ◽  
Stuart Wilkinson ◽  
...  
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Nutrient Digestibility ◽  
Egg Mass ◽  
Shell Weight ◽  
Shell Quality ◽  
Ad Libitum ◽  
Egg Shell ◽  
The Impact

Laying hens require substantial quantities of calcium (Ca) to maintain egg production. However, maintaining recommended dietary Ca through inclusion of limestone may impede nutrient digestibility, including that of other minerals. It was hypothesized that providing a separate source of dietary Ca in the form of limestone grit would preserve Ca intake of hens offered diets containing suboptimal Ca concentrations. Furthermore, the impact of dietary phytase at a “superdosing” inclusion rate on the voluntary consumption of limestone grit was evaluated. One hundred and forty-four laying hens (19 weeks of age) were assigned to one of six dietary treatments in a 3 × 2 factorial arrangement comprising three dietary Ca concentrations (40, 30, and 20 g/kg) and ±dietary phytase (3500 FYT/kg diet) on an ad libitum basis for six weeks. Limestone grit (3.4 ± 1.0 mm) was provided to all hens ad libitum. Hens offered diets containing phytase consumed significantly less limestone grit p = 0.024). Egg weight, rate of lay, and egg mass were unaffected by dietary treatment (p > 0.05). Egg shell weight % (p < 0.001), shell thickness (p < 0.001), and shell breaking strength (p < 0.01) decreased in line with dietary Ca levels. In summary, dietary superdosing with phytase reduced the consumption of a separate limestone source in individually housed, early lay ISA Brown hens. Egg shell quality variables but not egg production worsened in line with lower dietary Ca levels.

Effects of chitooligosaccharide supplementation on egg production, egg quality and blood profiles in laying hens

2018 ◽  
Author(s):  
Yang Jiao ◽  
Rajesh Jha ◽  
Wan Lin Zhang ◽  
In Ho Kim
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Density Lipoprotein ◽  
Dietary Supplementation ◽  
Basal Diet ◽  
Linear Effects ◽  
Dietary Treatments ◽  
Haugh Unit ◽  
Blood Profiles

The present study evaluated the effects of dietary supplementation of chitooligosaccharide (COS) on egg production, egg quality and blood profiles in laying hens. A total of 192 Hy-Line Brown laying hens (initial age- 46 weeks) were allocated to one of four treatments with eight replications per treatment and six adjacent cages as replication for eight-weeks study. Dietary treatments consisted of CON, basal diet; COS1, CON + 0.1% COS; COS2, CON + 0.2% COS; and COS3, CON + 0.3% COS. Linear improvement (p Lass Than 0.05) was observed in egg quality and high-density lipoprotein cholesterol (HDL/C) concentration at subsequent weeks. In week 8, linear (P=0.04) improvement was observed in haugh unit of egg with the increase in the dose of COS. In addition, linear effects (p Lass Than 0.05) on eggshell thickness at week 3, 5, 6, 7 and 8 were detected as the level for increased COS. In conclusion, the supplementation of COS in laying hens diets linearly improved the egg quality and the HDL/C concentration. Thus, COS has the potential to be used as a substitute to antibiotics in layer hen’s diets.

scholarly journals Fish by-product meal in diets for commercial laying hens

2017 ◽  
Vol 39 (3) ◽  
pp. 273
Author(s):  
André Ferreira Silva ◽  
Frank George Guimarães Cruz ◽  
João Paulo Ferreira Rufino ◽  
Waldo Mateus Plácido Miller ◽  
Nathália Siqueira Flor ◽  
...  
Keyword(s):  
Production Cost ◽  
Egg Production ◽  
Laying Hens ◽  
Polynomial Regression ◽  
Egg Quality ◽  
Feed Conversion ◽  
Egg Weight ◽  
Feed Cost ◽  
Randomized Design ◽  
Completely Randomized Design

 This study aimed to evaluate the increasing levels (0, 1, 2, 3 e 4%) of fish by-product meal in diets for laying hens on performance, egg quality and economic analysis. A total of 160 Dekalb White hens with 52-wk old were distributed in a completely randomized design with five treatments and four replicates of eight birds each. The experiment lasted 84 days divided into four periods of 21 days. Estimates of fish by-product meal levels were determined by polynomial regression. Differences (p < 0.05) were detected for all variables of performance, in egg weight, yolk and albumen percentage, yolk and albumen height, feed cost and production cost, in which the inclusion of fish by-product meal in the diets showed better results. It can be concluded that fish by-product meal can be used in diets for hens as alternative feed, with better results in egg production, feed conversion, egg weight, yolk-albumen ratio and a reduction in feed cost and production cost. 

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