Effects of Liquid Yucca Supplementation on Nitrogen Excretion, Intestinal Bacteria, Biochemical and Performance Parameters in Broilers

This study was done to determine the impacts Yucca schidigera supplementation to drinking water on the excretion of nitrogen, and subsequently the level of ammonia, intestinal bacterial count, hematological and biochemical parameters, and some performance parameters. A total of 270 one-day old Cobb 500 chicks were equally divided into three groups (90 chicks/group). The first control group (G1) was fed on the basal diets without any yucca supplementation. The 2nd and 3rd groups (G2 and G3) were fed on basal diets with Yucca Plus liquid®, at an 8 h/day supplementation rate of 0.5, and 1 mL/L to drinking water, respectively. The chicks that received yucca showed significant decreases in litter nitrogen content, when compared to controls. The chicks that received liquid yucca had reduced counts of total bacteria (TBC) (p < 0.05), Escherichia coli, and a non-significant increase in the number of lactic acid producing bacteria. They also showed increased activity of antioxidant enzymes, increased levels of immunoglobulins M and G, and decreased levels of lipid peroxidation biomarkers, without a harmful effect on liver and kidney function. The chicks that received yucca showed a better feed conversion ratio. In conclusion, the use of natural additives is necessary to decrease nitrogen losses, feed cost, and environmental pollution; without adverse impacts on animal performance. Liquid supplementation of saponins is valuable for the performance, gut health, and welfare of broiler chickens.

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The use of acidifying agents Aquasafe and Veleguard when rearing of broiler chickens

Kormlenie sel'skohozjajstvennyh zhivotnyh i kormoproizvodstvo (Feeding of agricultural animals and feed production) ◽

10.33920/sel-05-2002-02 ◽

2020 ◽

pp. 16-27

Author(s):

L. Gamko ◽

T. Tarinskaya

Keyword(s):

Drinking Water ◽

Organic Acids ◽

Broiler Chickens ◽

Positive Impact ◽

The Body ◽

Metabolic Energy ◽

Control Group ◽

Meat Production ◽

Feed Conversion ◽

Broiler Meat

It is known that necessary to replace the components of organic acids, which are part of acidifiers when drinking water to poultry in order to prevent the adaptation of microbes in the gastrointestinal tract. In the poultry industry organic acids are widely used, which are used as acidifiers to preserve the properties of water consumed. The purpose of this work was to evaluate the efficiency of broiler meat production when using acidifying agents of drinking water Aquasafe and Veleguard. The experimental part of the work has been performed in JSC “Kurinoe Tsarstvo-Bryansk” broiler area “Roshcha” in the Pochepsky district. The object of research was the livestock of broiler chickens cross Cobb 500 at floor housing. The effect of water acidifiers on meat productivity has been studied. Groups of chickens have been formed on the principle of pairs-analogues. Broiler chickens of experimental groups have been separated from the main livestock by a grid in the corner of the room for 100 heads in each group. It has been found by a result of research to be optimal dose usage of acidifying agents water Aquasafe and Veleguard to drink to broiler chickens. The positive effect of these acidifiers on the digestion of crude protein, crude fat, crude fiber, contributing to the effective use of nitrogen, which led to an increase in the intensity of growth, young animals’ livability and improved feed conversion. Slaughter yield in the control group was 55,1 %, and in the experimental group 57,2 and 58,4 %, which was by 2,1 and 3,3 % higher with the same level of metabolic energy and nutrients. In chickens that consumed acidifi ers more intensively used nutrients feed for deposition in the body of the components of the carcass, which affected the production. A positive impact of acidifying agents Aquasafe and Veleguard on meat quality in broiler chickens has been found.

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Metabolome and Microbiota Analysis Reveals the Conducive Effect of Pediococcus acidilactici BCC-1 and Xylan Oligosaccharides on Broiler Chickens

Frontiers in Microbiology ◽

10.3389/fmicb.2021.683905 ◽

2021 ◽

Vol 12 ◽

Author(s):

Yuqin Wu ◽

Zhao Lei ◽

Youli Wang ◽

Dafei Yin ◽

Samuel E. Aggrey ◽

...

Keyword(s):

Propionic Acid ◽

Broiler Chickens ◽

Pathogenic Bacteria ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Control Group ◽

Gut Health ◽

Feed Conversion ◽

Metabolome Analysis ◽

Treatment Groups

Xylan oligosaccharides (XOS) can promote proliferation of Pediococcus acidilactic BCC-1, which benefits gut health and growth performance of broilers. The study aimed to investigate the effect of Pediococcus acidilactic BCC-1 (referred to BBC) and XOS on the gut metabolome and microbiota of broilers. The feed conversion ratio of BBC group, XOS group and combined XOS and BBC groups was lower than the control group (P < 0.05). Combined XOS and BBC supplementation (MIX group) elevated butyrate content of the cecum (P < 0.05) and improved ileum morphology by enhancing the ratio of the villus to crypt depth (P < 0.05). The 16S rDNA results indicated that both XOS and BBC induced high abundance of butyric acid bacteria. XOS treatment elevated Clostridium XIVa and the BBC group enriched Anaerotruncus and Faecalibacterium. In contrast, MIX group induced higher relative abundance of Clostridiaceae XIVa, Clostridiaceae XIVb and Lachnospiraceae. Besides, MIX group showed lower abundance of pathogenic bacteria such as Campylobacter. Metabolome analysis showed that all the 3 treatment groups (XOS, BBC and MIX) showed lower concentrations of sorbitol and both XOS and BBC group had higher concentrations of pyridoxine levels than CT group. Besides, XOS and BBC groups enhanced the content of hydroxyphenyl derivatives 4-hydroxyphenylpyruvate 1 and 3-(3-hydroxyphenyl) propionic acid, respectively (P < 0.05). Notably, MIX group enhanced both 4-hydroxyphenylpyruvate 1 and 3-(3-hydroxyphenyl) propionic acid (P < 0.05). Thus, XOS and BBC may have a synergistic role to improve the performance of broilers by modulating gut microbiota and metabolome.

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

JOURNAL OF ADVANCES IN AGRICULTURE ◽

10.24297/jaa.v3i2.4256 ◽

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.

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Effect of dietary probiotic, antibiotic or combination on broiler performance, cecum microbial population and ileal development

Mansoura Veterinary Medical Journal ◽

10.35943/mvmj.2020.21.313 ◽

2020 ◽

Vol 21 (3) ◽

pp. 74-79

Author(s):

Ahmed Elbaz ◽

Said El-sheikh

Keyword(s):

Control Diet ◽

Low Density Lipoprotein ◽

Density Lipoprotein ◽

Experimental Period ◽

Nutrient Digestibility ◽

Lipoprotein Cholesterol ◽

Control Group ◽

Gut Health ◽

Feed Conversion ◽

Broiler Performance

Objective: To investigate the effect of antibiotics and/or probiotics on broiler performance, some serum metabolites, cecum microflora composition, and ileum histomorphology under the Egyptian conditions. Design: Randomized controlled experimental study. Animals: Two hundred forty 1-day-old Ross (308) chicks were reared till 35 days of age. Procedures: The birds were randomly allocated into four main groups: a control diet without additives (CON); probiotic (Lactobacillus acidophilus) supplemented diet (PRO); antibiotic (Avilamycin) supplemented diet (ANT) and a mix group (AP) that received antibiotic in the diet form 1 to 4 days of age and treated during the rest of the experimental period with probiotics. Results: Chickens fed on probiotic or antibiotic diets had linear improvement in live body weight (LBW) and feed conversion ratio (FCR) compared with the control group, while the best LBW and FCR were in the AP group. An improvement in the nutrient digestibility was observed in the probiotic added groups (PRO and AP). Serum cholesterol and low-density lipoprotein cholesterol contents decreased when antimicrobial (probiotic or antibiotic) supplementations were used, while there was an increase in high-density lipoprotein cholesterol contents, serum total protein, and albumin levels. Among all groups, cecum Clostridium perfringens and Escherichia coli counts decreased; however, there was an increase in Lactobacillus count compared to the control group. In probiotic supplemented groups (PRO and AP), a significant (P<0.05) improvement in ilea architecture. Conclusion and clinical relevance: Using probiotic after initial treatment with an antibiotic in broiler diets had a positive effect on broiler growth performance, gut health (improved cecum microbial populations and ileum histomorphology), and nutrient digestibility.

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The Effect of Administration of a Phytobiotic Containing Cinnamon Oil and Citric Acid on the Metabolism, Immunity, and Growth Performance of Broiler Chickens

Animals ◽

10.3390/ani11020399 ◽

2021 ◽

Vol 11 (2) ◽

pp. 399

Author(s):

Magdalena Krauze ◽

Monika Cendrowska-Pinkosz ◽

Paulius Matuseviĉius ◽

Anna Stępniowska ◽

Paweł Jurczak ◽

...

Keyword(s):

Drinking Water ◽

Small Intestine ◽

Citric Acid ◽

Beneficial Effect ◽

Growth Performance ◽

Broiler Chickens ◽

Coliform Bacteria ◽

Control Group ◽

Cinnamon Oil ◽

Nonesterified Fatty Acids

It was postulated that a phytobiotic preparation containing cinnamon oil and citric acid added to drinking water for chickens in a suitable amount and for a suitable time would beneficially modify the microbiota composition and morphology of the small intestine, thereby improving immunity and growth performance without inducing metabolic disorders. The aim of the study was to establish the dosage and time of administration of such a phytobiotic that would have the most beneficial effect on the intestinal histology and microbiota, production results, and immune and metabolic status of broiler chickens. The experiment was carried out on 980 one-day-old male chickens until the age of 42 days. The chickens were assigned to seven experimental groups of 140 birds each (seven replications of 20 individuals each). The control group (G-C) did not receive the phytobiotic. Groups CT-0.05, CT-0.1, and CT-0.25 received the phytobiotic in their drinking water in the amount of 0.05, 0.1, and 0.2 mL/L, respectively, at days 1–42 of life (continuous application, CT). The birds in groups PT-0.05, PT-0.5, and PT-0.25 received the phytobiotic in the same amounts, but only at days 1–7, 15–21, and 29–35 of life (periodic application, PT). Selected antioxidant and biochemical parameters were determined in the blood of the chickens, as well as parameters of immune status and redox status. The morphology of the intestinal epithelium, composition of the microbiome, and production parameters of chickens receiving the phytobiotic in their drinking water were determined as well. The addition of a phytobiotic containing cinnamon oil and citric acid to the drinking water of broiler chickens at a suitable dosage and for a suitable time can beneficially modify the microbiome composition and morphometry of the small intestine (total number of fungi p < 0.001, total number of aerobic bacteria p < 0.001; and total number of coliform bacteria p < 0.001 was decreased) improving the immunity and growth performance of the chickens (there occurred a villi lengthening p = 0.002 and crypts deepening p = 0.003). Among the three tested dosages (0.05, 0.1, and 0.25 mL/L of water) of the preparation containing cinnamon oil, the dosage of 0.25 mL/L of water administered for 42 days proved to be most beneficial. Chickens receiving the phytobiotic in the amount of 0.25 mL/L had better growth performance, which was linked to the beneficial effect of the preparation on the microbiome of the small intestine, metabolism (the HDL level p = 0.017 was increased; and a decreased level of total cholesterol (TC) p = 0.018 and nonesterified fatty acids (NEFA) p = 0.007, LDL p = 0.041, as well as triacylglycerols (TAG) p = 0.014), and immune (the level of lysozyme p = 0.041 was increased, as well as the percentage of phagocytic cells p = 0.034, phagocytosis index p = 0.038, and Ig-A level p = 0.031) and antioxidant system (the level of LOOH p < 0.001, MDA p = 0.002, and the activity of Catalase (CAT) p < 0.001 were decreased, but the level of ferric reducing ability of plasma (FRAP) p = 0.029, glutathione p = 0.045 and vitamin C p = 0.021 were increased).

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Effects of Xylo-Oligosaccharides on Broiler Chicken Performance and Microbiota

Applied and Environmental Microbiology ◽

10.1128/aem.01616-15 ◽

2015 ◽

Vol 81 (17) ◽

pp. 5880-5888 ◽

Cited By ~ 74

Author(s):

C. De Maesschalck ◽

V. Eeckhaut ◽

L. Maertens ◽

L. De Lange ◽

L. Marchal ◽

...

Keyword(s):

Broiler Chickens ◽

Degradation Products ◽

Hydrolytic Degradation ◽

Feed Additives ◽

Gut Health ◽

Feed Conversion ◽

Content Type ◽

Beneficial Effects ◽

Coa Transferase

ABSTRACTIn broiler chickens, feed additives, including prebiotics, are widely used to improve gut health and to stimulate performance. Xylo-oligosaccharides (XOS) are hydrolytic degradation products of arabinoxylans that can be fermented by the gut microbiota. In the current study, we aimed to analyze the prebiotic properties of XOS when added to the broiler diet. Administration of XOS to chickens, in addition to a wheat-rye-based diet, significantly improved the feed conversion ratio. XOS significantly increased villus length in the ileum. It also significantly increased numbers of lactobacilli in the colon andClostridiumcluster XIVa in the ceca. Moreover, the number of gene copies encoding the key bacterial enzyme for butyrate production, butyryl-coenzyme A (butyryl-CoA):acetate CoA transferase, was significantly increased in the ceca of chickens administered XOS. In this group of chickens, at the species level,Lactobacillus crispatusandAnaerostipes butyraticuswere significantly increased in abundance in the colon and cecum, respectively.In vitrofermentation of XOS revealed cross-feeding betweenL. crispatusandA. butyraticus. Lactate, produced byL. crispatusduring XOS fermentation, was utilized by the butyrate-producingAnaerostipesspecies. These data show the beneficial effects of XOS on broiler performance when added to the feed, which potentially can be explained by stimulation of butyrate-producing bacteria through cross-feeding of lactate and subsequent effects of butyrate on gastrointestinal function.

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Galacto-oligosaccharides modulate the juvenile gut microbiome and innate immunity to improve broiler chicken performance

10.1101/631259 ◽

2019 ◽

Cited By ~ 1

Author(s):

Philip J. Richards ◽

Geraldine M. Flaujac Lafontaine ◽

Phillippa L. Connerton ◽

Lu Liang ◽

Karishma Asiani ◽

...

Keyword(s):

Growth Rate ◽

Innate Immunity ◽

Broiler Chickens ◽

Broiler Chicken ◽

Control Diet ◽

Innate Immune ◽

Gut Health ◽

Feed Conversion ◽

Growth Promoters ◽

Key Species

ABSTRACTImprovements in growth performance and health are key goals in broiler chicken production. Inclusion of prebiotic galacto-oligosaccharides in broiler feed enhanced the growth rate and feed conversion of chickens relative to a calorie-matched control diet. Comparison of the cecal microbiota identified key differences in abundance ofLactobacillusspp. Increased levels ofL. johnsoniiin GOS-fed juvenile birds at the expense ofL. crispatuswas linked to improved performance (growth rate and market weight). Investigation of the innate immune responses highlighted increases of ileal and cecal IL-17A gene expression counterposed to a decrease in IL-10 and IL-17F. Quantification of the autochthonousLactobacillusssp. revealed a correlation between bird performance andL. johnsoniiabundance. Shifts in the cecal populations of keyLactobacillusspp. of juvenile birds primed intestinal innate immunity without harmful pathogen challenge.IMPORTANCEImprovements in the growth rate of broiler chickens can be achieved through dietary manipulation of the naturally occurring bacterial populations whilst mitigating the withdrawal of antibiotic growth promoters. Prebiotic galacto-oligosaccharides (GOS) are manufactured as a by-product of dairy cheese production, which can be incorporated in the diets of juvenile chickens to improve their health and performance. This study investigates the key mechanisms behind this progression and pin pointsL. johnsoniias a key species that facilitates the enhancements in growth rate and gut health. It also relates the role of the innate immune system in the response to the GOS diet.

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Effect of silicon oxide supplementation in broiler chickens' drinking water on performance and litter quality under tropical environment

Nigerian Journal of Animal Production ◽

10.51791/njap.v47i4.91 ◽

2020 ◽

Vol 47 (4) ◽

pp. 132-138

Author(s):

E. Opoola

Keyword(s):

Drinking Water ◽

Weight Gain ◽

Broiler Chickens ◽

Litter Quality ◽

Silicon Oxide ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Feed Conversion ◽

Final Body Weight ◽

Feed Cost

The present study was conducted to determine the effect of silicon oxide in broiler chickens drinking water on performance and litter quality. A total of 120, one-day old mixed sex broiler chicks were randomly divided into 4 treatments and 3 replications, with 10 birds in each replicate in a completely randomised experimental design, with 4 silicon levels (0.00, 1.50, 2.00 and 2.50 mg of silicon oxide/litre of water. Corn-soya based diets were formulated at the starter (0–4 weeks) and finisher (5–8weeks) phases and were supplied ad libitum with free access to water. The average daily temperature and relative humidity inside the poultry house were 35.9 °C and 36%, respectively. At the starter phase, chicks administered 2.00mg silicon oxide/litre of water had significantly (p<0.05) higher final body weight (991.00g) and average weight gain (950.96g) compared to chicks without silicon oxide 778.57 g and 738.54g. The inclusion of 2.00 mg silicon oxide/litre of water improved feed conversion ratio compared to the control group (p < 0.05) and significantly reduced feed cost per kg gain. For the finisher phase, chickens administered 2.00mg silicon oxide/litre of water had the best results for final weight, weight gain and feed cost per kg gain. Also, inclusion of silicon oxide in broiler chickens water improved litter quality as predominantly dry material but with some areas of wet shavings was observed. In conclusion, silicon oxide in broiler chickens drinking water at 2.00mg/litre of water enhanced growth performance, improved feed conversion ratio and litter quality as well as reduced feed cost per kg gain at the starter and finisher phases respectively.

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Pengaruh penggunaan ramuan herbal sebagai feed additive terhadap in come over feed cost ayam broiler

Jurnal Sains Peternakan ◽

10.21067/jsp.v5i2.3160 ◽

2017 ◽

Vol 5 (2) ◽

pp. 100-105

Author(s):

Ferdianus Nono ◽

Dyah Lestari Yulianti ◽

Aju Tjatur Nugroho Krisnaningsih

Keyword(s):

Drinking Water ◽

Broiler Chickens ◽

Feed Consumption ◽

Feed Additive ◽

Control Group ◽

Feed Cost ◽

Randomized Design ◽

Completely Randomized Design ◽

Feed Costs ◽

The Cost

ABSTRAK Tujuan penelitian ini adalah untuk mengetahui pengaruh dari penggunaan ramuan herbal terhadap income over feed cost ayam broiler. Materi yang digunakan pada penelitian ini adalah: ayam broiler DOC. Penelitian ini dirancang dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari 4 perlakuan dan masing-masing perlakuan terdiri dari 4 ulangan. Perlakuan yang digunakan dalam penelitian ini adalah penggunaan ramuan herbal dalam air minum dengan level penggunaan sebagai berikut : P0: tanpa penambahan ramuan herbal, P1:air + 10 % ramuan herbal, P2: air + 15 % ramuan herbal, P3: air + 20% ramuan herbal. Variabel yang di amati dalam penelitian ini adalah konsumsi pakan, biaya pakan, dan income over feed cost ayam broiler. Data yang diperoleh (income over feed cost) di analisis dengan menggunakan analisis ragam dengan rancangan Acak Lengkap (RAL). Hasil penelitian menunjukan bahwa biaya pakan tertinggi terdapat pada kelompok perlakuan P3 diikuti berturut-turut oleh P1, P2, P0 dan yang terendah adalah P0. Sedangkan pada P0 biaya pakan paling rendah karena tidak ada penggunaan ramuan herbal. Berdasarkan data penerimaan, penerimaan tertinggi terdapat pada kelompok kontrol P1 Rp 31.430,6 sedangkan penerimaan terandah terdapat pada kelompok P0 sebesar Rp 24.814,8.100 Rendahnya penerimaan dalam penelitian ini disebabkan oleh rendahnya bobot badan ayam broiler selama penelitian. Income Over Feed Cost selama penelitian yang tertinggi terdapat pada kelompok P3 (3.568), dan terendah terdapat pada perlakuan P1 (979) P0 (1.964), P2 (1.937) karena biaya pakan lebih tinggi dari pada penerimaan.Ini berarti bahwa penggunaan ramuan herbal dalam air minum berpengaruh sangat nyata (P< 0,01) terhadap Income Over Feed Cost. Berdasarkan hasil penelitian dapat disimpulkan bahwa penggunaan ramuan herbal sebagai feed additive memberikan pengaruh sangat nyata terhadap IOFC ayam broiler. Abstract The purpose of this study was to determine the effect of using herbal ingredients on income over feed costs of broiler chickens. The material used in this study was: broiler DOC. This study was designed using a Completely Randomized Design (CRD) consisting of 4 treatments and each treatment consisted of 4 replications. The treatment used in this study is the use of herbal ingredients in drinking water with the use level as follows: P0: without the addition of herbal ingredients, P1: water + 10% herbal ingredients, P2: water + 15% herbal ingredients, P3: water + 20% herbal concoctions. The variables observed in this study were feed consumption, feed costs, and income over feed costs for broiler chickens. The data obtained (income over feed cost) is analyzed using a variety of analysis with a completely randomized design (CRD). The results showed that the highest feed costs were found in the P3 treatment group followed by P1, P2, P0 and the lowest was P0. Whereas at P0 the cost of feed is lowest because there is no use of herbal ingredients. Based on acceptance data, the highest revenue was in the P1 control group of Rp. 31,430.6 while the lowest acceptance was in the P0 group of Rp. 24,814.8,100. The low acceptance in this study was caused by the low body weight of broiler chickens during the study. Income Over Feed Cost during the highest research was found in the P3 group (3,568), and the lowest was found in the treatment of P1 (979) P0 (1,964), P2 (1,937) because the cost of feed was higher than acceptance. drinking water has a very significant effect (P <0.01) on Income Over Feed Cost. Based on the results of the study it can be concluded that the use of herbal ingredients as additive feeds has a very significant effect on IOFC broiler chickens.

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The use of amaranth (genus AmaranthusL.) in the diets for broiler chickens

Veterinární Medicína ◽

10.17221/5560-vetmed ◽

2012 ◽

Vol 51 (No. 7) ◽

pp. 399-407 ◽

Cited By ~ 8

Author(s):

B. Pisarikova ◽

Z. Zraly ◽

S. Kracmar ◽

M. Trckova ◽

I. Herzig

Keyword(s):

Broiler Chickens ◽

Live Weight ◽

Control Group ◽

Feed Conversion ◽

Feeding Trial ◽

Control Groups ◽

Broiler Performance ◽

Amaranth Grain ◽

Percentage Yield ◽

Experimental Group

The objective of our study was to test amaranth grain or dried biomass in the diet for broiler chickens as a resource of protein replacing animal protein. Further, the effect of amaranth on broiler performance, carcass characteristics and meat quality were assessed in a feeding trial. The experimental groups of broilers were fed feed mixtures with crude amaranth grain (AC), heat processed amaranth grain (AP) or dried above-ground biomass (AB). Control groups (C) received the diet containing animal proteins. The results obtained in the experimental groups of broiler chickens can be compared to the control group in all the production indicators under investigation. On day 42 of the experiment, live weight (g) of female broilers ranged from 2 205.1 ± 152.5 (AP) to 2 254.0 ± 136.5 (C), and that of male broilers from 2 375.1 ± 233.0 (AC) to 2 506.0 ± 286.0 (C). Feed conversion ranged from 1.80 kg in control group of male broiler chickens to 1.91 kg in experimental group of male broilers (AB). Percentage yield in female broiler chickens ranged from 70.8 ± 1.74 (AB) to 72.4 ±3.34(AC) or 72.4 ± 1.98 (C), and in male broilers from 72.8 ±3.55(AP) to 75.1 ±2.44(AB). Our results showed that amaranth can fully replace meat-and-bone meals in the diets for broiler chickens.

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