Broiler Chicken Feed Research Articles

Efficiency of using corn extract in feeding broiler chickens

Efficiency of using corn extract in feeding broiler chickens

Efficiency of protein-rich plant and animal additives in feeding broiler chickens

Recently, there has been a need to find new ways to intensify the poultry industry thus maximizing the net yield. The inclusion of such protein-rich feed additives as maize gluten and Organic in the diet of broiler chickens in the amount of 3 % of mixed feed weight both separately and in the mixture increased the body weight gain by 8.8–19.2 %, survival rate – by 3.3 %, feed efficiency – by 0.23–0.26 of energy feed units or by 9.1–9.8 %, productivity index (European Production Efficacy Factor) – by 47.9–91.7 units or 35.5–36.7 %. Besides, their meat quality was improved: the content of dry matter, protein, fat and ash increased by 8.44–8.54 %; 1.56–1.6 %; 0.89–0.98 %; 0.16–0.2 %. The total tasting score of pectoral muscles increased by 5.8–6.3 %. Additional profit per head increased by 7.94–19.65 rubles, the level of profitability of broiler chicken cultivation increased by 5.37–13.14 %.

Efficacy of a phytonutrient supplement at different dietary protein contents on growth performance, gut morphology, digestive enzymes activities and stress indicators of broilers subjected to circular heat stress

Context Dietary manipulations such as reductions in protein or the addition of bioactive feed additives might alleviate the adverse effects of high ambient temperature in poultry. Aims The effects of dietary crude protein (CP) and phytonutrient mixture (PM) on growth performance and physiological responses were evaluated in broilers under circular heat stress (HS). Methods In total, 420 1-day-old broiler chickens were randomly distributed to seven treatments in a factorial arrangement (3 × 2), with three levels of CP (normal, medium (95% of the normal CP content) and low (90% of the normal CP content)) and with or without the addition of PM (mixture of 5 mg/kg carvacrol, 3 mg/kg cinnamaldehyde, and 2 mg/kg capsicum oleoresin). The thermoneutral control (TNC) birds were housed in a thermoneutral chamber and fed with a normal-CP diet without PM supplementation. The other six groups were kept in a HS chamber (33°C) for 8 h (1000 hours to 1800 hours). Key results After 6 weeks, feeding broiler chickens with low-CP diets had adversely affected growth performance and intestinal protease activities, while mortality rate, heterophile to lymphocyte ratio, and serum cortisol concentration of the low-CP group were lower (P < 0.05) than those of the high-CP group. Dietary PM supplementation also positively influenced (P < 0.05) average daily gain, feed conversion ratio, intestinal lipase and trypsin activities and serum T4 concentration. There were the CP × PM interactions (P < 0.05) for jejunal villus height and villus surface area, indicating that the effect of PM on these responses was more marked at the lower dietary CP contents. Conclusions Supplementation with PM can ameliorate the detrimental effects of HS on productive performance and digestive enzyme activities in broilers. The PM supplementation could improve intestinal morphology when applied to the diets of heat-stressed broilers with lower CP contents (95% and 90% of the recommendations). Implications Although growth performance was reduced by feeding low-CP diets (90% of the normal CP content), a beneficial effect was observed on the stress indicators of broilers grown in HS conditions. Dietary supplementation of PM might also be an effective strategy to alleviate the adverse effect of HS.

The effect of compound feed on the productivity of broiler chickens

The article analyses the issues of balanced feeding of broiler chickens and their balanced diet. The results of studies aimed to determine the effect of mixed feeds on the productivity of Arbor Acres cross broiler chickens and the economic efficiency of poultry meat production companies are presented. It was found that broilers from the experimental group, who were fed with improved compound feed with additional sources of proteins and carbohydrates and feed additives exceeded broilers from the control group by their live weight at all ages. At the slaughter age, the average weight was more than 39.2%. The experimental group consumed 10-15% less feed whose conversion was 2.4 and 1.9 kg in favour of the group feeding with the new compound feed. The new compound feed had a positive effect on the viability of broilers: there were no deaths during the period under study. According to the control slaughter results, it was found that the pre-slaughter live weight was higher by 35% in the experimental group. The weight of edible parts increased by 6%. The improved compound feed can be used both in industrial conditions and by poultry farms.

Comparative study of efficiency and safety of using of different zinc and copper sources in broiler chicken feeding for poultry meat production

The paper presents the study on the environmental-biology assessment of different zinc and copper sources in broiler chicken diets. The first experiment included a comparative evaluation of copper sulfate and zinc sulfate, nanoparticles of these metal alloy (ZnCu NP), and Cu and Zn asparaginate. The second experiment implied that copper sulfate was replaced with CuI NP (d=55±15 nm); Cu II NP (d=103±2 nm); Cu asparaginate. In the third experiment, the ZnSO4×7H2O in the chicken diet was replaced with Zn NP, with Zn asparaginate. The first experiment revealed the greatest productive effect when using ZnCu NP. The replacement of Cu and Zn sulfates with ZnCu NP was accompanied by the increase in the copper pool in the body by 58.2 % compared to the control and by 39.3 % compared to the use of asparaginate. The differences in the amount of zinc pool in the chicken body made 17.3 and 51.9 %, respectively. In the second experiment, the greatest productive effect was found in the group receiving CuII NP, the efficacy was lower with the use of asparaginates, and the lowest with the feeding of copper and CuI NP sulfates. The highest bioavailability of copper was obtained from CuII NP agent. Upon the conclusion of the third experiment, the highest body weight was observed in the zinc asparaginate group. The value of the zinc pool in the poultry of this group exceeded the level of the control group by 9.5 and by 15.7 % when using Zn NP. The obtained result shows the possibility of using these forms in the industrial production of animal feed.

Serum biochemistry, haematological profile and organ proportion of broiler starter chicks fed graded levels of palm oil mill effluent (POME)

The experimental feeding trial conducted for 28 days was carried out to examine the serum biochemistry and haematological responses, organ proportion of broiler starter chickens fed graded levels of palm oil mill effluent (POME). A total of 240 (two hundred and forty) day old marshal broiler chicks strain were used for the study. The chicks were divided into 5 (five) treatment groups and within each group, replicated 4 (four) times at 12 chicks per replicate, feed and water were given ad libitum. Different graded/replacement levels of POME with maize at diet 1(control) (0%), diet 2 (6%), diet 3 (12%), diet 4 (18%) and diet 5 (24%) respectively were investigated to ascertain the health implications in feeding broiler chicks with POME by the blood profile and serum biochemical assessment in the study, using Completely Randomized Design (CRD). Data collected were subjected to Analysis of Variances (ANOVA) using SPSS version 20, results were interpreted using Duncan New Multiple Range Test for means separation. Dietary POME intake affects significantly (p<0.05) serum protein, glucose blood levels, enzymes, cholesterol, triglyceride and haematological profile. Organs proportion like, liver, lungs, kidney, pancreas and large intestine were (p<0.05) affected by dietary treatment. Serum total protein, plasma protein, albumin, globulin, creatinine, urea and alanine amino transferase and white blood cell were significantly decreased (p<0.05). Glucose, aspartate amino transferase, alkaline phosphatase, pack cell volume, red blood cell, haemoglobin, mean corpuscular haemoglobin, mean corpuscular volume, mean corpuscular haemoglobin concentration, significantly increased (p<0.05). Cholesterol blood levels for diet 5 was higher (p<0.05). Triglyceride blood levels for control diet was higher (p<0.05). Cholesterol and triglyceride blood levels for diet 3 were (p<0.05) lowest. From the results obtained from these findings, POME may have possessed some nutritional values required to improve health and reproductive performance of the broiler chickens as alternative feeds replacement for maize.

Bio-Economics Of Feeding Cassava Root Meal Based Diets to Broiler Finisher Chickens

A study was conducted to investigate the bio-economics of feeding broiler chickens graded levels of cassava root meal based diets, as replacement for maize at 0, 25, 50, 75 and 100% to form treatment diets T1 , T2 , T3 , T4 and T5 respectively, with adjustment in soybean levels across the treatment diets to have iso-nitrogenous diets. Two hundred and forty- 4 weeks old 'Amos' strain broiler chicks were in a completely randomized design allotted randomly to five treatment groups of 48 birds each and of three replicates with each replicate having 16 birds. Parameters measured included weight gain, feed intake, feed gain ratio, price per kg of feed, price per kg of broiler and weight of carcass cuts. Data were analyzed using analysis of variances. Daily weight gain for T1 , T2 , T3 , T4 and T5 were 41.16g/b/d, 39.43, 33.47, 25.25 and 16.91 g/b/d, respectively while, daily feed intake for T1 , T2 , T3 , T4 and T5 were 113.35g, 112.75, 102.31, 93.34 and 85.94g, respectively. Results showed weight gain feed intake and feed Conversion ratio values to be significantly (P<0.05) depressed as the level of replacement of maize with cassava root meal exceeded 25%. Among the carcass parameters, only the dressed carcass (%) and thigh (%) weight values showed significant (P<0.05) decrease as the level of replacement level of maize with cassava root meal exceeded 25% while, spleen (%) and liver (%) values showed progressive increase (P<0.05) in weight as the level of cassava root meal increased in the diets. Cost of feed decreased (p<0.05) significantly with the increasing level of cassava root meal. However, it did not translate to increase in price per kg of bird. It could therefore be suggested that cassava root meal should not exceed 25% as replacement for maize in broiler finisher diets, as beyond this level growth performance is adversely impaired.

Effect of cereal type and plant extract addition on the growth performance, intestinal morphology, caecal microflora, and gut barriers gene expression of broiler chickens

Feeding broiler chickens on diets based on cereal grains of high non-starch polysaccharides content such as wheat and barley can negatively impact their performance and gut health. Plant extracts can be used as a potential tool to alleviate these negative effects. The present study assessed the effects of dietary cereal type and the inclusion of a plant extract blend (PEB) on the growth performance, intestinal histomorphology, caecal microflora, and gene expression of selected biomarkers for gut integrity in broiler chickens in a 42-d experiment. Ross-308 male broilers were assigned into different dietary treatments and fed on two cereal types (corn- vs. wheat/barley-based) with/without added graded concentrations of a PEB (0, 250, 500, 1000, and 2000 mg/kg diet). There were no significant differences in the growth performance parameters, intestinal histomorphology, and caecal microflora due to the impact of dietary cereal type. However, lactobacilli count in the caecal microflora was increased in the group fed on a corn-based diet. The PEB supplementation especially at a level of 500 to 1000 mg/kg diet significantly increased the average BW and decreased the feed conversion ratio. It also increased the villi length of duodenum, jejunum, and ileum, decreased the duodenal crypt depth, and increased the villi length to crypt depth ratio in the duodenum, jejunum and ileum. Supplementation of the PEB decreased the total bacterial and coliform count and increased the lactobacilli count in a linear pattern. Gene expression of Occludin and Junction Adhesion Molecule was significantly increased in the PEB supplemented diets, whereby no influence was observed on mucin expression. In conclusion, supplementation of a PEB at levels of 500–1000 mg/kg can be used as a tool to improve broiler performance and gut health.

The effects of seaweed-based pellet binders on growth performance, feed efficiency and carcass characteristics in broilers

Good quality pellets may improve feed efficiency and animal growth performance. In this study, the effects of the addition of seaweed binders (Kappaphycus alvarzeii and Sargassum polycystum) on growth performance and feed efficiency in broiler chickens were examined. The physicochemical properties and physical test of formulated broiler chicken feed in addition of potent seaweeds as binder were also examined. K. alvarzeii and S. polycystum were evaluated as binding agents in pelleted diets for broiler chicken over a period of 35 days. The experimental design was randomized complete block with 8 treatment diets and 6 replications per treatment. Broiler chickens were weighed, and the feed intake were taken weekly to determine the growth performance and feed efficiency. Feed formulations for broiler chicken with both seaweeds’ inclusions at different dietary levels (2, 5 and 10 %) were prepared. The parameters measured were body weight, feed intake (FI), feed conversion ratio (FCR) and carcass measurements. Based on the physicochemical and physical test, pellet quality (PDI and hardness) was observed better in 5% S. polycystum diets, which reflected on better results of feed intake (FI) on birds. The results showed that broiler fed with 2 % of S. polycystum showed the highest body weight. Following this, carcass evaluation was conducted on day 36 to record any effects of seaweeds towards body parts of birds. Based on the results, this study showed that inclusion of both seaweeds in broiler’s diet has no significant effect on carcass traits.

КОРМОВАЯ ДОБАВКА НА ОСНОВЕ ПИВНОЙ ДРОБИНЫ В БРОЙЛЕРНОМ ПТИЦЕВОДСТВЕ

The aim of the research was to study the effectiveness of the use of feed supplements based on brewer's grains in compound feed for broiler chickens. It has been established that the use of feed additives in mixed feed for broiler chickens contributes to an increase in live weight by 3.8 -8.0 %. Feed costs per 1 kg of live weight gain were lower in the second experimental group by 6.3 %, in the third – by 2.9 % and in the fourth – by 8.0 %. The yield of the whole carcass in the control group was 88.3 %, in the second – 89.6, in the third – 88.0 %, in the fourth – 89.8 %. Slaughter out-put of gutted carcasses in the first group was 72.3 %, in the second – 72.2, in the third – 72.5 %, in the fourth – 72.9 %. The greatest muscle output was noted in the third and fourth groups – 53.4 %. The output of the pectoral muscles was the highest in the fourth group – 30.3 %. The highest output of the femoral muscles was noted in the second group – 12.6 %, and the leg muscles in the third group – 11.3 %. As a result of the anatomical cutting of the carcasses, it was revealed that the mass of the gizzard significantly increased in all experimental groups. There is a tendency to decrease in all experimental groups, the mass of the liver and glandular stomach in the fourth group. The optimal dosage of the feed additive was 1.5 % by weight of the feed.

Effect of Adding White Tea Leaves Powder (Camellia sinensis) to Broiler Chicken Diets on Some Biochemical Blood Parameters

This study aimed to evaluate the effect of dietary supplementation of white tea leaves powder (Camellia sinensis) on some biochemical parameters of broiler chickens. A total number of 360 one-day old unsexed broiler chicks (Ross 308) with similar average initial body weight were used. Chicks were randomly divided into two main experimental groups (each of 180 chicks). The 1st main experimental group was provided with normal water (NW) while the 2nd main experimental group was exposing to the oxidative stress by providing normal water with 0.5% of H2O2, each main experimental group was divided into four treatments (each of 45 chicks), with three replicates (15 chicks /replicate), according to feeding diets supplemented with white tea powder were (T1): chicks fed basal diet without adding white tea powder, while the second (T2), third (T3) and fourth (T4) group were chicks fed basal diet supplemented with 1, 2 and 3g white tea leaves powder/kg diet, respectively. The results obtained showed that broiler chicks provided by the normal water has the better biochemical blood parameters than those received the oxidative water. Broiler chicks fed diets supplemented with different levels of white tea leaves powder improve some physiological and biochemical blood parameters than control group. From the results obtained in this study, it could be recommended with feeding broiler chicks (Ross 308) on diet supplemented with 3g/kg feed and provided with normal water seemed to be adequate to achieve the favorable results for improve the biochemical and physiological parameters.

The effect of differences between house length and placement zones inside the closed house on the utilization of broiler chicken feed protein in the dry season

The research aims to examine the effect of differences in house length and placement zones inside a closed house on the utilization of broiler chicken feed protein in the dry season. The research material is 600 broiler chickens (strain cobb) divided into 20 experimental units and 2 closed houses with a length of 60 m with a capacity of 11,000 and a length of 120 m with a capacity of 22,000. This research used a randomized block design with a split-plot pattern and two factors. The main plot is closed house with length 60 and 120 meters, the subplot is the zone placement of chicken which are divided into 4 zones: zone 1 is parallel to the inlet, zone 2 is measured at 1/4 of the house length, zone 3 is measured at 1/2 the house length, zone 4 is measured at 3/4 the house length from the inlet. The parameters observed were protein digestibility, the protein efficiency ratio (PER), and nitrogen retention (NR). Macroclimate, microclimate, and microclimatic ammonia observed as supporting data and an overview of the research conditions. Longer house and placement zone of chicken further from the inlet increase temperature, humidity, and microclimatic ammonia inside the closed house. The results showed an interaction between the house length and placement zone of chicken against NR. The housing length of 120 m and zone 4 was significantly (P≤0,05) having lower protein digestibility, PER, and NR values. Protein digestibility began to decrease significantly (P≤0,05) in zone 3, while PER and NR significantly decrease from zone 2. It concludes that longer closed house and placement zones further from the inlet decrease the ability of broilers to utilizing feed protein in the dry season.

Use of palm oil cake in diets for slow growing chickens

Looking for food alternatives for slow-growing broiler chickens is a necessity to boost production, which is mainly conducted by small and medium producers linked to family farming, especially in the Amazon region. For this reason, the objective was to evaluate the potential use of Palm Oil Cake (POC) as an alternative ingredient in the feeding of slow-growing broiler chickens up to 28 days of age. We used 416 male French Red-Naked Neck chicks, in a completely randomized experimental design with four treatments (0, 10, 15, and 20% of POC inclusion) with eight replicates each. The performance of the birds, allometry of the digestive organs and the economic analysis of the diets were evaluated. It is concluded that POC can be included in the diets of slow growing broiler chickens, up to 28 days, in up to 15% without causing damage in their performance, without negatively modifying the allometry of the digestive organs and without economic disadvantages to the producer.

VALUATION OF THE NUTRITIONAL MATRIX BY PHYTASE AND SOY GUM IN THE DIET FORMULATION FOR BROILER CHICKENS

ABSTRACT The study was carried out with the objective of evaluating whether the valorisation of the nutritional matrix by the addition of the enzyme phytase and soy gum, in isolation or in association in the formulation of broiler chicken diets compromises the performance in the phase of 7 to 42 days of age and can be economically viable. Seven hundred 7-day-old male Cobb 500 broiler chicks were distributed in a completely randomised design consisting of seven treatments and five replications of 20 birds. The treatments consisted of a standard diet and six other diets whose matrix values of phytase and gum were valued, either alone or in combination, in the formulation of the diets. The individual valuation of the nutritional matrix of the phytase and soy gum in the formulation of feed for broiler chickens did not compromise the zootechnical performance of the chickens; however, only the valuation with phytase proved economically viable, since the inclusion of the gum and its valuation did not contribute to a reduction in the production cost or gross margin compared to a standard diet.

IMPROVEMENT OF COMBINED FEEDS FOR BROILERS WITH THE «PKB PLUS» ENZYME

The purpose of this study was to investigate the effect of the addition of an enzyme complex to diets of different nutritional value on the performance of broiler chickens. The article deals with the effect of feed additives on changes in weight gain, hematological and slaughter rates of broiler chickens. In this study, three groups of broiler chickens of the Cobb-500 breed (10 animals each) were treated and received different concentrations of enzyme-enriched feed. During the period of cultivation, following the generally accepted norms and methods of poultry feeding, it was found that the use of feed biocatalyst full-enzyme feed with activators in feeding broiler chickens at the rate of 250 g/t and 500 g/t increases the live weight at the end of cultivation by 4,52% and 9,4%. In this case, the average daily growth over the growing period increased by 4.76% and 9.52%. There is an increase in the mass of carcass by 6.19% and 12.38%.According to the results of the control slaughter, no significant influence of the studied factor on the mass of internal organs was established.The studies did not reveal any adverse effects on the major hematological parameters that were within the physiological norm. The results of the study should be used for growing broiler chickens to increase live weight gain and increase feed conversion. The enzyme preparation «PKB Plus» can be used in feed mixtures which have cereals in their composition such as wheat, soybeans, corn, triticale, etc., for broiler chickens with low levels of nutrients and energy for accelerating the metabolism of birds, inhibition of pathogenic and pathogenic which adversely affects the development of broiler chickens.

Effectiveness of using a hybrid rye cultivar in feeding broiler chickens

The aim of this research was to evaluate the effectiveness of the use of hybrid rye in rations for broiler chickens. The study covered 160 chickens split into four equal groups [I (control), II, III, IV] and kept for 42 d. Rye was introduced into the above-mentioned diets as a partial substitute for maize in the following quantities: (I), no rye; (II), 5% rye in starter feed and 10% rye in grower and finisher feed; (III), 10% rye in starter feed and 20% rye in grower and finisher feed; (IV), 15% rye in starter feed and 30% rye in grower and finisher feed. During the 42 d rearing period, the most favourable body weight gain (P ≤ 0.05) and feed conversion ratio (P ≤ 0.01) were observed in chickens fed with rations containing the highest share of hybrid rye (group IV). The rye did not affect the dressing percentage and muscularity but diversified the fatness of birds. The muscles of chickens from group IV showed higher (P ≤ 0.01) red saturation and lower (P ≤ 0.01) yellow saturation and hue compared with the muscle of birds receiving diets with the lowest rye content (group I). The results of the study show that the inclusion of hybrid rye can be recommended in broiler chicken diets at a share of 15% in starter feed and 30% in grower and finisher feed, respectively.

Meat receiving with functional properties when feeding the rabbits and broiler chickens of metal and protein complexes

The results of researches on the infl uence of new metal and protein compounds in the feeding of rabbits and broiler chickens on the quality of meat have been presented in the paper. The researches have been aimed at solving the urgent problem of providing the population of country with complete-fl edged diets, which today account for up to 30 % of meat products. The paper shows that a lifetime change in the chemical composition and nutritional value of muscle tissue, obtaining functional foods is possible when correcting the micromineral part of the diet of animals through the use of metal and protein complexes Belmin and Chrombelmin. The use of modern research methods allowed us to determine the optimal rate of feeding these feed additives. The results have been shown that the inclusion in the diet of rabbits organic complex Belmin in an amount of 2,0 dose per head/day has increased content in muscle tissue of rabbits of iron (+37,8 %, P < 0,001), copper (+34,66 %, P < 0,001), zinc (+27,01 %, P < 0,001) and essential amino acids (+5,1–0,53 %). Feeding Chrombelmin to broiler chickens as part of compound feed (0,15 %) has increased the level of selenium in the chest muscle by 3 times (P < 0,001), in the femoral muscle – by 1,25 times. The content of manganese, zinc, and chromium changes slightly. In the breast muscle of broilers the lipid content has been increased by 1,37 % (P < 0,05), and in the femoral muscle it decreased by 1,11 % (P < 0,05). The use of metal and protein feed additives Belmin and Chrombelmin in animal husbandry increases productivity, as well as the production of meat products with the increase of content of micronutrients, which will provide the population with not only high-quality, but also useful for health food products.

Use of probiotic feed additive Prolaksim-V in diet of broiler chickens

Method for using probiotic feed additive Prolaksim-V with a therapeutic and preventive effect to improve the indicators of live weight gain, feed conversion and the safety of poultry stock was proposed by the authors. Composition of Prolaksim-V feed additive is dominated by species of lactic and propionic bacteria: Streptococcus salivarius LT-1, Lactobacillus acidophilus LT-12, Streptococcus thermophilus LT-9, LT-10 and Propionibacterium freudenreichi LT-8. These bacteria perform an important physiological role in the organism due to their protective and synthetic functions, as well as participation in the final link of the digestive process. Probiotic flora plays a leading role in maintaining and normalizing intestinal microbiocenosis, maintaining non-specific resistance of the body, improving protein and mineral metabolism, etc. deficiency of lactic and propionic bacteria is one of the pathogenetic factors of long-term intestinal dysfunctions. It leads to a violation of mineral metabolism, to the formation of chronic digestive disorders. There is evidence that used bacteria are some suppliers of a number of essential amino acids, primarily tryptophan, as well as vitamins. Protective role of lactic and propionic bacteria in vivo is largely due to the formation of organic acids that prevent the development of putrid and pathogenic forms of microorganisms. The analytical action of these microorganisms is due to the presence of propionic and lactic acids, resulting in a decrease in the pH of the intestinal contents. It was found that the use of probiotic preparation in feeding broiler chickens contributes to an increase in the daily growth of poultry in the experimental groups, compared with the control. There was also an increase in the mass of gutted carcasses, improvement in feed conversion, and an increase in the safety indicators of poultry that receive probiotic together with the general diet.

Evaluating the effect of feeding starters crumbles on the overall performance of broilers raised for 42 days

The physical form of feed affects the feed consumption and growth rate of broilers. A 42-D experiment was conducted to determine the effects of broiler starter feed form on the growth performance of broilers. A total of nine hundred 1-day-old Cobb 500 male broiler chicks with an average initial BW of 38 g were randomly distributed into 36-floor pens with 25 birds per pen. Pens were randomly assigned to 1 of 4 dietary treatments within a location block to provide 9 pens per treatment. Birds were fed the dietary treatments during the starter phase from day 1 to 21 followed by a common mash diet from day 22 to 42. Dietary treatments were made up of 1) 21 D mash (M); 2) 7 D crumbles followed by 14 D mash (7C); 3) 14 D crumbles followed by 7 D mash (14C), and 4) 21 D crumbles (21C). Overall the BW, average daily gain (ADG), and average daily feed intake (ADFI) were increased (P < 0.001) for the birds fed crumbles compared with those fed the mash diet. Feed conversion ratio (FCR) was improved (P < 0.001) for the birds fed crumbles compared with those fed the mash diet. Birds fed 21C were heavier at 21 D and 42 D and had improved (P < 0.001) FCR compared with those fed the other diets. The results of the study suggest that feeding broiler chicks crumbles as opposed to mash diet for a minimum of 7 D improved BW, ADG, ADFI, and FCR.

The effect of unconventional mineral mixtures on the nutrient digestibility of broiler chicken feed

The article presents the results of the influence of the mineral mixture using local raw materials on the physiological parameters of broiler chickens of “Ross 308” cross. The studies were conducted on the basis of YeniseiAgroSoyuz LLC of the Sukhobuzim district of the Krasnoyarsk Territory, and the stock-raising farm of the Institute of Applied Biotechnology and Veterinary Medicine of FSBEI HE Krasnoyarsk State Agrarian University. The aim of the research was to study the effect of the mineral mixture using local raw materials in feeding broiler chickens. It has been found that a mineral mixture containing limestone, monocalcium phosphate, oxidized brown coal, belite sludge, peat, and vermiculite improves the nutrient digestibility of broiler chicken feed.