scholarly journals Effects of Varying Dietary Zinc Levels and Environmental Temperatures on the Growth Performance, Feathering Score and Feather Mineral Concentrations of Broiler Chicks

2010 ◽  
Vol 23 (7) ◽  
pp. 937-945 ◽  
Author(s):  
P. W. Lai ◽  
J. B. Liang ◽  
L. C. Hsia ◽  
T. C. Loh ◽  
Y. W. Ho
Keyword(s):  
Growth Performance ◽  
Broiler Chicks ◽  
Dietary Zinc ◽  
Zinc Levels ◽  
Mineral Concentrations ◽  
Environmental Temperatures

Optimal dietary zinc levels of broiler chicks fed a corn–soybean meal diet from 22 to 42 days of age

2013 ◽  
Vol 53 (5) ◽  
pp. 388 ◽  
Author(s):  
Xiudong Liao ◽  
Ang Li ◽  
Lin Lu ◽  
Songbai Liu ◽  
Sufen Li ◽  
...  
Keyword(s):  
Growth Performance ◽  
Soybean Meal ◽  
Serum Alkaline Phosphatase ◽  
Basal Diet ◽  
Mrna Abundance ◽  
Broiler Chicks ◽  
Dietary Zinc ◽  
Liver Copper ◽  
Zn Concentration ◽  
Zinc Levels

An experiment was conducted to investigate the effect of dietary zinc (Zn) level on growth performance, Zn concentration, Zn metalloenzyme activity, Zn transporter 2 (ZnT2) mRNA abundance, metallothionein (MT) mRNA abundance and MT concentration in either serum or tissues, so as to evaluate the optimal dietary Zn level of broiler chicks fed a corn–soybean meal diet from 22 to 42 days of age. At 22 days of age, 288 birds were assigned randomly by bodyweight to one of eight dietary treatments of six replicate cages each with six birds per cage, and fed a Zn-unsupplemented basal corn–soybean meal diet containing 27.66 mg of Zn/kg or the basal diet supplemented with 20, 40, 60, 80, 100, 120 or 140 mg of Zn/kg from reagent-grade ZnSO4·7H2O. Regression analysis was performed to estimate the optimal dietary Zn level in the presence of asymptotic response. The results showed that dietary Zn level had no effect (P > 0.25) on the growth performance, serum alkaline phosphatase and 5′-nucleotidase activities, and liver copper-Zn superoxide dismutase activity, but affected (P < 0.07) tibia Zn concentration, pancreas Zn concentration, ZnT2 mRNA abundance, MT mRNA abundance and MT concentration. The optimal dietary Zn requirements of broilers from 22 to 42 days of age were 62.44 mg/kg for tibia Zn, 64.30 mg/kg for ZnT2 mRNA abundance and 53.50 mg/kg for MT mRNA abundance based on asymptotic models, respectively. Accordingly, the optimal dietary Zn level for broilers from 22 to 42 days of age was 65 mg/kg in this study.

Supplementation Dietary Zinc Levels on Growth Performance, Carcass Traits, and Intramuscular Fat Deposition in Weaned Piglets

2014 ◽  
Vol 161 (1) ◽  
pp. 69-77 ◽  
Author(s):  
H. B. Zhang ◽  
M. S. Wang ◽  
Z. S. Wang ◽  
A. M. Zhou ◽  
X. M. Zhang ◽  
...  
Keyword(s):  
Growth Performance ◽  
Carcass Traits ◽  
Intramuscular Fat ◽  
Fat Deposition ◽  
Weaned Piglets ◽  
Dietary Zinc ◽  
Zinc Levels

Effects of feeding Isomaltooligosaccharides on the growth performance, carcass traits and immune response of broiler chickens

2014 ◽  
Vol 3 (1) ◽  
pp. 150-157
Author(s):  
Khalid M. Gaafar
Keyword(s):  
Immune Response ◽  
Growth Performance ◽  
Broiler Chickens ◽  
Carcass Traits ◽  
Dietary Supplementation ◽  
Control Group ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
Flu Vaccine ◽  
Lipids Profile

The research was conducted to study the effect of feeding broiler chickens on diets containing isomaltooligosaccharides on the growth performance, carcass traits and immune response. 90-one day old broiler chicks were used according to completely randomized two treatment groups and one control, 30 birds each. Birds fed ad-libitum on basal starter and grower-finisher diets for 35 day. Diets of treatment`s groups contained 0.5 g/Kg and 1 g/Kg of Isomaltooligosaccharides, while the control group fed on the basal diets without Isomaltooligosaccharides supplementation. Dietary supplementation of broiler chickens with Isomaltooligosaccharides improved body weight, feed conversion, carcass traits, two lymphoid organs weight and log antibody titer against avian flu vaccine. Most of the highest values were for birds fed low levels of Isomaltooligosaccharides. Feed intake decreases as Isomaltooligosaccharides level increases. Dietary supplementation with Isomaltooligosaccharides did not affect the lipids profile (triglycerides, total cholesterol, LDL and HDL), however the blood VLDL levels decreased with increased levels of Malondialdehyde and Glutathione reductase. Collectively, Dietary supplementation of broiler chickens with 0.5 g/Kg diet of Isomaltooligosaccharides improved growth performance, carcass traits and immune status.

scholarly journals Supplementing Garlic Nanohydrogel Optimized Growth, Gastrointestinal Integrity and Economics and Ameliorated Necrotic Enteritis in Broiler Chickens Using a Clostridium perfringens Challenge Model

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 2027
Author(s):  
Doaa Ibrahim ◽  
Tamer Ahmed Ismail ◽  
Eman Khalifa ◽  
Shaimaa A. Abd El-Kader ◽  
Dalia Ibrahim Mohamed ◽  
...  
Keyword(s):  
Growth Performance ◽  
Clostridium Perfringens ◽  
Broiler Chickens ◽  
Body Weight Gain ◽  
Economic Benefits ◽  
Production Costs ◽  
Broiler Chicks ◽  
Necrotic Enteritis ◽  
Feed Conversion ◽  
Intestinal Lesion

Necrotic enteritis (NE) caused by Clostridium perfringens (C. perfringens) results in impaired bird growth performance and increased production costs. Nanotechnology application in the poultry industry to control NE outbreaks is still not completely clarified. Therefore, the efficacy of dietary garlic nano-hydrogel (G-NHG) on broilers growth performance, intestinal integrity, economic returns and its potency to alleviate C. perfringens levels using NE challenge model were addressed. A total of 1200 male broiler chicks (Ross 308) were assigned into six groups; four supplemented with 100, 200, 300 or 400 mg of G-NHG/kg diet and co-challenged with C. perfringens at 21, 22 and 23 d of age and two control groups fed basal diet with or without C. perfringens challenge. Over the total growing period, the 400 mg/kg G-NHG group had the most improved body weight gain and feed conversion efficiency regardless of challenge. Parallel with these results, the mRNA expression of genes encoding digestive enzymes (alpha 2A amylase (AMY2A), pancreatic lipase (PNLIP) and cholecystokinin (CCK)) and intestinal barriers (junctional adhesion molecule-2 (JAM-2), occludin and mucin-2 (Muc-2)) were increased in groups fed G-NHG at higher levels to be nearly similar to those in the unchallenged group. At 14 d post challenge, real-time PCR results revealed that inclusion of G-NHG led to a dose-dependently decrease in the C. perfringens population, thereby decreasing the birds’ intestinal lesion score and mortality rates. Using 400 mg/kg of G-NHG remarkably ameliorated the adverse effects of NE caused by C. perfringens challenge, which contributed to better growth performance of challenged birds with rational economic benefits.

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