scholarly journals Effect of Dietary Supplementation of Biological Curcumin Nanoparticles on Growth and Carcass Traits, Antioxidant Status, Immunity and Caecal Microbiota of Japanese Quails

Animals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 754 ◽  
Author(s):  
Fayiz M. Reda ◽  
Mohamed T. El-Saadony ◽  
Shaaban S. Elnesr ◽  
Mahmoud Alagawany ◽  
Vincenzo Tufarelli
Keyword(s):  
Body Weight ◽  
Lipid Profile ◽  
Pathogenic Bacteria ◽  
Body Weight Gain ◽  
Carcass Traits ◽  
Basal Diet ◽  
Feed Conversion ◽  
Blood Constituents ◽  
Japanese Quails ◽  
The Impact

This study was planned to evaluate the impact of different nano-curcumin levels on the growth rate, carcass, blood chemistry and caecal microbes of growing quail. A total of 270 Japanese quails at one-week-old were distributed to six equal groups; each group consisted of 45 unsexed birds with five replications (nine quails each). The 1st group was fed a basal diet, whereas the 2nd, 3rd, 4th, 5th and 6th groups were fed diets containing nano-curcumin (0.1, 0.2, 0.3, 0.4 and 0.5 g/kg diet, respectively). Nano-curcumin levels significantly increased (p ≤ 0.0001) body weight at 3 weeks and 5 weeks of age. Body weight gain during 1–3, 3–5 and 1–5 weeks of age was significantly increased (p < 0.0001) in groups treated with nano-curcumin levels (except at 0.3 g/kg; 1–3 weeks) compared to control. During 1 to 5 weeks, feed intake was decreased (p < 0.0001) in birds receiving nano-curcumin (0.1, 0.3 and 0.4 g/kg) diets. The best values of feed conversion ratio were recorded for the 0.4 g nano-curcumin-treated group. Carcass traits were not affected Nano-curcumin levels. The inclusion of nano-curcumin (0.2, 0.3 or 0.5 g/kg) significantly increased serum TP (p = 0.0004), albumin (p = 0.0078) and globulin (p < 0.0001). Quails fed with nano-curcumin (0.2 g/kg) exhibited the highest SOD and GSH activities, serum IgG and IgM concentrations and complement values compared to control. The addition of any level of nano-curcumin in the quail diet also significantly improved the lipid profile. In conclusion, supplemental nano-curcumin had beneficial impacts on growth, lipid profile, blood constituents, antioxidant indices, and immunity of growing quail, as well as increasing counts of lactic acid bacteria and reducing pathogenic bacteria.

scholarly journals Use of Chemical Nano-Selenium as an Antibacterial and Antifungal Agent in Quail Diets and Its Effect on Growth, Carcasses, Antioxidant, Immunity and Caecal Microbes

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3027
Author(s):  
Mahmoud Alagawany ◽  
Shaza Y. A. Qattan ◽  
Youssef A. Attia ◽  
Mohamed T. El-Saadony ◽  
Shaaban S. Elnesr ◽  
...  
Keyword(s):  
Body Weight ◽  
Lipid Profile ◽  
Growth Performance ◽  
Carcass Traits ◽  
Dietary Supplementation ◽  
Control Group ◽  
Total Bacterial Count ◽  
Japanese Quails ◽  
Intestinal Pathogens ◽  
The Impact

Nano-minerals are used to enhance mineral bioavailability, which helps improve animal growth and health. The use of chemical nano-selenium (Che-SeNPs) has lately attracted great scientific interest, mainly due to its potential benefits for poultry. The current study was conducted to investigate the impact of the dietary supplementation of Che-SeNPs on the growth performance, carcass traits, blood constituents, antioxidant status, immunity, and gut microbiota of Japanese quails. A total of one week-old 180 Japanese quails were randomly distributed into four equal groups, and each group consisted of 45 unsexed birds with five replications (nine birds each). The first group was fed a basal diet without supplementation (0 g/kg Che-SeNPs), and the second, third, and fourth groups were fed diets containing 0.2, 0.4, and 0.6 g/kg Che-SeNPs, respectively. The results showed that the dietary supplementation of Che-SeNPs significantly (p < 0.0001) increased body weight, body weight gain, and feed conversion ratio, but decreased feed intake (p < 0.0001) compared to the control group. The highest values of growth performance were recorded in the group fed 0.4 g Che-SeNPs g/kg feed. Che-SeNPs levels did not affect the carcass traits, relative organs (except liver), or blood hematology (except platelet count and hemoglobin level) of quails. Plasma total protein, albumin, aspartate amino transferase (AST), and urea values were not affected by dietary Che-SeNPs, but alanine aminotransferase and lactate dehydrogenase values declined. Globulin and creatinine values were linearly increased with the inclusion of Che-SeNPs (0.4 and 0.6 g/kg) in quail diets compared to the control. The supplementation of Che-SeNPs in quail diets significantly improved (p < 0.05) the plasma lipid profile and activities of antioxidant enzymes compared to the control group. Immunoglobulin G values of Che-SeNPs (0.4 and 0.6 g/kg) were higher (p < 0.05) than those in the control group. The groups fed diets supplemented with Che-SeNPs showed lower (p < 0.0001) total bacterial count, total yeast and molds count, Coliform, Escherichia coli, Enterococcus spp., and Salmonella spp. colonization, and higher (p = 0.0003 and 0.0048) lactic acid bacteria counts than those in the control group. In conclusion, Che-SeNPs supplemented up to 0.4 g/kg can improve the performance, lipid profile, antioxidant indices, and immunity, as well as decrease intestinal pathogens in quails during the fattening period (1–5 weeks of age).

scholarly journals Use of Chemical Nano Selenium as Antibacterial and Antifungal Agent in Quail Diets and its Effect on Growth, Carcasses, Antioxidant, Immunity and Caecal Microbe

2021 ◽  
Author(s):  
Mahmoud Alagawany ◽  
M. T. El-Saadony ◽  
S. S. Elnesr ◽  
M. Farahat ◽  
G. Attia ◽  
...  
Keyword(s):  
Body Weight ◽  
Lipid Profile ◽  
Growth Performance ◽  
Body Weight Gain ◽  
Carcass Traits ◽  
Dietary Supplementation ◽  
Control Group ◽  
Total Bacterial Count ◽  
Intestinal Pathogens ◽  
The Impact

Abstract Nano-minerals are used to enhance mineral bioavailability, which helps improve animal growth and health. The use of chemical nano-selenium (Che-SeNP) has lately attracted great scientific interest, mainly due to its potential benefits for poultry. The current study was conducted to investigate the impact of the dietary supplementation of Che-SeNPs on growth performance, carcass traits, blood constituents, antioxidant status, immunity, and gut microbiota of quails. A total of one week-old 180 Japanese quails were randomlydistributed into four equal groups, and each group consisted of 45 unsexed birds with five replications (nine birds each). The first group was fed a basal diet without supplementation (0 g/kg Che-SeNP), and the second, third, and fourth groups were fed diets containing 0.2, 0.4, and 0.6 g/kg Che-SeNP, respectively. The results showed that the dietary supplementation of Che-SeNP significantly (P < 0.05) increased body weight, body weight gain, and feed conversion ratio but decreased feed intake (P < 0.001) compared to the control group. The highest values of growth performance were recorded in the group fed 0.4 g Che-SeNP g/kg feed. Che-SeNP levels did not affect carcass traits, relative organs (except liver), or blood hematology (except platelet count and hemoglobin level) of quails. Plasma total protein, albumin, aspartate aminotransferase (AST) and urea values were not affected by dietary Che-SeNP, but alanine aminotransferase and lactate dehydrogenase values declined. Globulin and creatinine values were linearly increased with the inclusion of Che-SeNP (0.4 and 0.6 g/kg) in quail diets compared to the control. The supplementation of Che-SeNP in quail diets significantly improved (P < 0.05) the plasma lipid profile and activities of antioxidant enzymes compared to the control group. Immunoglobulin G values of Che-SeNPs (0.4 and 0.6 g/kg) were higher (P < 0.05) than those in the control group. The groups fed diets supplemented with Che-SeNP showed lower (P < 0.0001) total bacterial count, total yeast and molds count, Coliform, Escherichia coli, Enterobacter, and Salmonella colonization, and higher (P = 0.0003 and 0.0048) lactic acid bacteria counts than those in the control group. In conclusion, dietary supplementation with Che-SeNP can improve the performance, lipid profile, antioxidant indices, and immunity, as well as decrease intestinal pathogens in quails.

scholarly journals Effect of a low-energy and enzyme-supplemented diet on broiler chicken growth, carcass traits and meat quality

2019 ◽  
Vol 62 (1) ◽  
pp. 297-304 ◽  
Author(s):  
Elsayed O. S. Hussein ◽  
Gamaleldin M. Suliman ◽  
Alaeldein M. Abudabos ◽  
Abdullah N. Alowaimer ◽  
Shamseldein H. Ahmed ◽  
...  
Keyword(s):  
Body Weight ◽  
Meat Quality ◽  
Body Weight Gain ◽  
Control Diet ◽  
Carcass Traits ◽  
Metabolizable Energy ◽  
The Other ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
The Impact

Abstract. The objective of this study was to evaluate the impact of a low metabolizable energy (low-ME) diet supplemented with a multienzyme blend (KEMZYME®) on the growth performance, carcass traits and meat quality of chickens. A total of 108 broiler chicks (Ross 308) were randomly allocated to three experimental groups with six replicates per treatment and five birds per replicate; the groups were treated as follows: a control diet with no additive and standard metabolizable energy (ME; 3200 kcal kg−1); a low metabolizable energy (low-ME; 3000 kcal kg−1) diet; and a low-ME diet + 0.5 g kg−1 diet of enzyme (low-ME–Enz). Live body weight (LBW) at 43 and 47 d and body weight gain (BWG) during the periods from 38 to 43, 43 to 47 and 33 to 47 d decreased with the low-ME and low-ME–Enz diets in comparison with the control-diet (p<0.05). The values of the feed conversion ratio (FCR) were significantly increased with low-ME diets with or without enzyme at all growing stages. There were no significant differences among treatments in terms of carcass traits. With the exception of the jejunum weight, dietary treatments did not affect any digestive tract segments. Meat hardness decreased with the low-ME–Enz diet compared with the other diets (P=0.039). Meat yellowness of the breast muscle increased (P=0.001) with the low-ME–Enz diet in comparison with the other treatments at 24 h post-slaughter. In conclusion, the low-ME diet supplemented with KEMZYME® did not influence most of performance parameters and carcass traits of chickens; however, adding enzymes to the low-ME diet is an effective strategy to improve the meat quality criteria and small intestine characteristics.

scholarly journals Growth Performance, Serum Biochemical Indices, Duodenal Histomorphology, and Cecal Microbiota of Broiler Chickens Fed on Diets Supplemented with Cinnamon Bark Powder at Prestarter and Starter Phases

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 94
Author(s):  
Mohammed M. Qaid ◽  
Saud I. Al-Mufarrej ◽  
Mahmoud M. Azzam ◽  
Maged A. Al-Garadi ◽  
Hani H. Albaadani ◽  
...  
Keyword(s):  
Body Weight ◽  
Broiler Chickens ◽  
Body Weight Gain ◽  
Basal Diet ◽  
Positive Control ◽  
Negative Control ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
Serum Globulin ◽  
Maximum Improvement

Ross 308 broiler chicks (n = 240) aged 1 day were assigned to five groups for eight replicates (six chicks for each) (3♂ and 3♀). Basal dietary groups were supplemented by 2000, 4000, and 6000 mg/kg cinnamon (CN) for 21 days. Basal diet alone was used as a negative control, and basal antibiotic diet (Colimox) was used as a positive control. At 10, 14, and 21 days of age, chicks that received 2000 mg CN and Colimox had a higher body weight, resulting in an increase in body weight gain. CN also resulted in the maximum improvement in the feed conversion ratio and feed efficiency over 1–21 days at the level of 2000 mg/kg. At days 10, the maximum relative breast weight was 2000 mg/kg of CN. Mean serum albumin concentrations, duodenal villus height, and goblet cell density increased (p < 0.05) by 2000 mg/kg of CN, and mean serum globulin and total protein concentrations and crypt depth increased (p < 0.05) by 6000 mg/kg of CN compared with control. Increased cecal Escherichia coli number was CN dose-dependent. In conclusion, dietary inclusion of 2000 mg/kg CN can be applied as an alternative to in-feed antibiotics for broiler starter diet.

scholarly journals Effect of Dietary Additives on Rabbit Performance, Carcass Traits and Some Blood Constituents under Egyptation Summer Season

2017 ◽  
Vol 10 (1) ◽  
pp. 139
Author(s):  
Sara Khalil Sherif
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Organic Acids ◽  
Carcass Traits ◽  
Blood Parameters ◽  
Summer Season ◽  
Feed Additives ◽  
Daily Weight Gain ◽  
Feed Conversion ◽  
Blood Constituents

Sixty 7-week-old New Zealand White rabbits were randomly distributed into 5 equal experimental groups. The experimental rabbits were fed the tested diets till 14 weeks of age during summer season. The basal diet without feed additives (control; T1) and the other experimental diets were supplemented with enzymes at 0.5 g/kg (T2), organic acids at 1.0 g/kg (T3), Beta-pro at 0.2 g/kg (T4) or their combination (T5). The criteria of response were body weight, weight gain, feed consumption, feed conversion ratio, some blood constituents, carcass traits and economic efficiency. The obtained results can be summarized as follows: Positive effects of feed additives were observed on live body weight, daily weight gain and feed conversion of growing rabbits. There were no significant effects on blood parameters or carcass traits due to feed additives. It can be concluded that dietary Beta-pro (enzymes+probiotics) or a combination of enzymes, organic acids and Beta-pro at the tested levels can be used to improve the rabbit performance, with no adverse effects on carcass characteristics or blood parameters.

scholarly journals Dampak Pemberian Mikroenkapsulasi Minyak Ikan dalam Pakan terhadap Kolesterol Darah dan Performa pada Domba

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ganesha Ade Riemas ◽  
Iman Hernaman ◽  
Diky Ramdani ◽  
Bambang Nurhadi
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Fish Oil ◽  
Body Weight Gain ◽  
Blood Cholesterol ◽  
Feed Conversion ◽  
Cholesterol Levels ◽  
Affect Body Weight ◽  
And Performance ◽  
The Impact

ABSTRAK. Tujuan penelitian ini untuk mengukur seberapa besar pengaruh minyak ikan yang sudah terenkapsulasi terhadap kolesterol darah dan performa pada Domba. Penelitian telah dilakukan di Sub Unit Pelayanan Pengembangan Pembibitan Ternak Domba dan Kambing (SUPPPTDK) Bunihayu, Subang pada tanggal 20 Januari 2020 sampai 27 Maret 2020. Sebanyak 18 ekor domba Ekor Tipis jantan dengan bobot 15,99±0,98 kg dialokasikan ke dalam 3 perlakuan secara acak. Domba tersebut diberi ransum perlakuan yang disuplementasi dengan mikroenkapsulasi minyak ikan sebanyak 0% (P0), 2,5% (P1), dan 5% (P2). Data yang terkumpul dilakukan analisis ragam dan bila hasil berbeda nyata maka dilanjutkan dengan uji Duncan. Hasil menunjukkan bahwa mikroenkapsulasi minyak ikan dapat menurunkan kolesterol darah (P0,05), namun tidak berpengaruh nyata terhadap pertambahan bobot badan, konsumsi dan konversi ransum (P0,05). Penurunan kadar kolesterol terjadi pada kelompok domba dengan perlakuan mikroenkapsulasi sebanyak 2,5% (P1) dan mikroenkapsulasi 5% (P2). Kadar kolesterol darah masing-masing perlakuan berturut-turut adalah 100,70 mg/dl (P0); 96,20 mg/dl (P1); dan 78,76 mg/dl (P2). Rataan yang terbaik pada pertambahan bobot badan, konsumsi bahan kering harian, dan konversi ransum terdapat pada P2 yaitu 63,96 g/hari, 574,13 g/hari, dan 9,08. Hasil penelitian dapat disimpulkan bahwa mikroenkapsulasi minyak ikan dapat menurunkan kolesterol darah, dengan penurunan tertinggi pada pemberian 5%.  (The impact of microencapsulation fish oil in feed on blood cholesterols and performance on sheep) ABSTRAK. This study measured the effect of encapsulated fish oil on blood cholesterol and sheep performance. The study was conducted at the Bunihayu Sheep and Goat Breeding Services Bunihayu, Subang on January 20, 2020 to March 27, 2020. A total of 18 male thin-tailed sheep 15.99±0.98 kg were allocated randomly into 3 treatments. The sheep were given feed supplemented with fish oil microencapsulation of 0% (P0), 2.5% (P1), and 5% (P2). The data were collected and analyzed by analysis of variance and, if the result is significantly different, continued by Duncan's test. The results showed that fish oil microencapsulation decreased blood cholesterol levels (P0.05). However, it did not affect body weight gain, consumption, and feed conversion (P0.05). Decreased levels of cholesterol occurred in the group of sheep with 2.5% microencapsulation (P1) and 5% microencapsulation (P2). Blood cholesterol levels of each treatment were 100.70 mg/dl (P0); 96.20 mg/dl (P1); and 78.76 mg/dl (P2), respectively. Averagely, the highest body weight gain, dry matter intake and feed conversion were found in P2 as much as 63.96 g/day, 574.13 g/day, and 9.08, respectively. The results can be concluded that microencapsulation of fish oil can reduce blood cholesterol, with the highest decrease at the level of 5%.

scholarly journals DIGONESTIC ENVIRONMENTAL MONITERING SYSTEM IN A POULTRY HOUSE

2017 ◽  
Vol 48 (3) ◽  
Author(s):  
Al-Chalabi & et al
Keyword(s):  
Body Weight ◽  
Agricultural Research ◽  
Body Weight Gain ◽  
Ventilation System ◽  
Winter Season ◽  
Research Station ◽  
Feed Conversion ◽  
Poultry House ◽  
Productive Traits ◽  
The Impact

This experiment was conducted at a closed poultry house , Poultry Research Station , office of Agricultural Research, Ministry of Agriculture, Baghdad, Iraq, for the period from 2/9 to 14/03/2016 for total rearing of 35 days. To diagnose and monitoring the Environmental factors such as temperature, humidity , density, and the carbon dioxide levels inside the house during winter season, and its impact on the productive performance of broiler chickens Rose 308 breed .The dimensions of the house was ,length 35 m x width 7.5 m x Height 2.5 m, by total space volume 3656.25 m3. The ventilation system in the house was (negative pressure type). The house is totally closed, small fans for (minimum ventilation) in the winter are functioned, and large fans for ventilation in the evaporative cooling operation were used in the summer. 1000 sexed birds were used in this experiment imported through commercial hatchery in Abu Ghraib. The house was divided into three thermal Zones in order to find out whether heterogeneity in environmental conditions is existed in the house and at bird level .as a result the impact on the homogeneity in the weights of marketed birds . The treatments have been distributed into 32 rearing cages by the following order: 8 cages with the density of 50 birds / cage, the remaining 24 cages were divided into the density of 25 birds / cage. The results showed that there were significant differences between the treatments in the rate of body weight ,body weight gain, feed intake and feed conversion efficiency among   densities and the three thermal zones due to the presence of cool air leaks into the house at the front ,End of the house, and its sides especially when fans are on , along with dead Air pockets that were identified in many places in the middle of the housed, yet this Zone was the one that had the best productive traits in comparison with the other two zones. The purpose of this experiment is to study environmental parameters homogeneity  inside the shed in addition to impact of CO2 levels and impact of birds density on productive traits.

scholarly journals Effect of methionine supplementation on the growth performance of rabbit

2013 ◽  
Vol 42 (1) ◽  
pp. 40-43 ◽  
Author(s):  
S Yesmin ◽  
ME Uddin ◽  
R Chacrabati ◽  
M Al-Mamun
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Body Weight Gain ◽  
Basal Diet ◽  
Nutrient Digestibility ◽  
Control Group ◽  
Feed Conversion ◽  
Final Body Weight ◽  
Methionine Supplementation ◽  
Four Levels

The present study was conducted to evaluate the effect of different levels of methionine supplementation on feed intake, nutrient digestibility and growth performance of growing rabbit. Sixteen weaned crossbred New Zealand White (NZW) growing rabbits (30-35 d) were distributed into four treatment groups having four replications in each group using a Completely Randomized Design (CRD). Basal diet composed of green grass (dhal grass) and concentrate mixture which was offered ad libitum basis for 56 days period. Four levels of methionine such as 0.0% (control), 0.15%, 0.25%, and 0.35% were supplemented randomly to rabbits. Results showed that supplementation of methionine did not affect green grass intake. Cumulative as well as daily concentrate and DM intake were significantly (p<0.05) higher for all methionine groups than control group. Final body weight gain as well as daily, weekly and cumulative body weight gains were improved significantly with increasing level of methionine. It was found that methionine had significant (p<0.01) effect on digestibility of DM, CP, NFE and EE but CF digestibility did not differ significantly. Digestibility was improved with increasing the level of methionine. Feed conversion ratio also decreased significantly with methionine supplementation, and 0.25% methionine group showed the best performance among the four treatments. DOI: http://dx.doi.org/10.3329/bjas.v42i1.15777 Bang. J. Anim. Sci. 2013. 42 (1): 40 43

Effect of Replacement of Antibiotic with Probiotic on Performance, Carcass Characteristics and Nutrient Retention in Broilers Fed with Meat Cum Bone Meal

2020 ◽  
Author(s):  
G. Madhuri ◽  
B. Swathi ◽  
P. Radhakrishna ◽  
D. Nagalakshmi
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Intake ◽  
Crude Protein ◽  
Body Weight Gain ◽  
Carcass Characteristics ◽  
Nutrient Retention ◽  
Basal Diet ◽  
Feed Conversion ◽  
Bone Meal

The effect of replacing an antibiotic growth promoter in the diet with a probiotic on growth performance, carcass characteristics and nutrient retention was studied in broilers (Vencobb 430) fed with and without meat cum bone meal (MBM). This experiment which lasted for 42 days consisted of six dietary treatments viz., basal diet (BD), basal diet with MBM (MBM), basal diet with antibiotic (AB), basal diet with probiotic (PB), basal diet with MBM and antibiotic (MBM+AB) and basal diet with MBM and probiotic (MBM+PB). Three-hundred, day-old chicks were randomly allotted in the beginning to these six groups. Body weight gain, feed intake and feed conversion ratio were significantly (P less than 0.05) affected at 4th week of age. Overall, highest body weight gain was recorded in birds fed with AB and PB. Inclusion of probiotic in MBM also showed improved body weight gain when compared to MBM group. Highest feed intake and feed conversion ratio was recorded with AB and PB groups. Birds supplemented with MBM+PB showed improved feed intake and feed efficiency when compared to MBM+AB and MBM diet supplemented groups. Higher dry matter, crude protein, calcium and phosphorus retention (P less than 0.05) was observed in birds supplemented with PB or AB in diet without MBM when compared to their control. In MBM supplemented groups addition of PB or AB improved crude protein retention. Birds supplemented with PB or AB with or without MBM showed a significant (P less than 0.05) increase in thigh yield and a non significant reduction in fat yield when compared to their control groups.

scholarly journals Estimation of the relative bioavailability of several zinc sources for broilers when fed a conventional diet

2012 ◽  
Vol 28 (3) ◽  
pp. 441-453
Author(s):  
M. Sahraei ◽  
H. Janmmohamadi ◽  
A. Taghizadeh ◽  
Ali Moghadam ◽  
S.A. Rafat
Keyword(s):  
Zinc Oxide ◽  
Body Weight ◽  
Weight Gain ◽  
Zinc Sulfate ◽  
Body Weight Gain ◽  
Basal Diet ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Broiler Chicks ◽  
Feed Conversion

An experiment was conducted with 312 day-old male broiler chicks in grower phase(8-28d) to estimate the biological availability of four sources Zinc (Zn), Zinc sulfate(ZnSO4.H2O), two sources of Zinc oxide(ZnO FG1 and ZnO FG2) and Bioplex Zn. Zinc sulfate (ZnSO4.H2O) was used as the standard in the bioavailability assay. Chicks were allotted randomly to 13 dietary treatments with 6 birds per replicate and 4 replicates per treatment, that included an unsupplemented corn-soybean meal basal diet (25.50 mg of Zn/kg of DM), or the basal diet supplemented with 100, 150 or 200 mg/kg of DM as either ZnSO4.H2O (33 % Zn), Zinc oxide FG1(72%Zn), Zinc oxide FG2 (75%Zn) or Bioplex Zn (15% Zn). Dietary Zn level and source had no effect (P>0.05) of feed intake or body weight gain of chicks during first and second weeks of experimental periods, but feed conversion ratio in the first and second week and feed intake, body weight gain or feed conversion ratio in third week and total experimental periods were significant difference between treatments (P<0.05). The relative biological availability values using body weight gain were estimated to be 59, 99 or 45 for three levels of Zinc oxide FG1, 64, 78 or 31 for three levels of Zinc oxide FG2 and 151, 200 or 147 for three levels of Bioplex Zn, respectively. From the standpoint of bioavailability, Bioplex Zn was more available to broiler chicks than Zn from other sources and can be used by the feed industry as sources of supplemental Zn for broiler chickens.

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