Biological and productive parameters of ruminants fed by the complex of feed additive

2018 ◽  
Author(s):  
Н. Боголюбова ◽  
В. Романов ◽  
В. Короткий
Keyword(s):  
Fatty Acids ◽  
Weight Gain ◽  
Volatile Fatty Acids ◽  
Control Period ◽  
High Energy ◽  
Amylolytic Activity ◽  
Daily Weight Gain ◽  
Feed Additive ◽  
Blood Protein ◽  
Control Group

Проведены физиологический и научно-производственный эксперименты в условиях физиологического двора ФГБНУ «ФНЦ ВИЖ им. Л. К. Эрнста». Первый — методом групп-периодов (в контрольный период животные получали основной рацион, в опытный — хвойно-энергетическую добавку из расчёта 2,5 мл на 10 кг живой массы), второй эксперимент — на двух группах (контрольной и опытной) бычков по той же схеме. При проведении эксперимента изучали показатели рубцового пищеварения (рН, общее количество летучих жирных кислот, концентрацию аммонийного азота, амилолитическую активность, содержание биомассы простейших и бактерий), биохимические и клинические показатели, среднесуточный и валовой прирост живой массы. Включаемая в состав рациона питания подопытных овец энерго-витаминно-минеральная добавка оказывала благотворное действие на микробиологические и ферментативные процессы в преджелудках, проявляющееся в повышении содержания общей микробной массы, образования летучих жирных кислот — на 0,25‒1,13 мМоль/100 мл, амилолитической активности рубцовой жидкости — на 3,27 Е/мл (Р < 0,05). Отмечалось большее общее количество переваренных питательных веществ и коэффициенты переваримости сухого и органического вещества, сырого протеина, сырого жира — на 6,9 абс.% (Р < 0,05), сырой клетчатки — на 2,5 абс.%. Анализ биохимических показателей крови овец выявил улучшение состояния белкового обмена в организме животных в опытный период, на что указывает повышение концентрации общего белка в крови на 14,1% (Р < 0,05), повышение концентрации альбуминов — на 32,8% (Р <0,05) и альбумино-глобулинового соотношения. У ярок в опытный период отмечали повышение концентрации глюкозы в крови на 11,4%. Среднесуточный прирост бычков опытной групп был на 6,3% выше, чем в контроле. To test their physiological parameters ruminants consumed the basic diet in the control period while in the experimental one they received high-energy supplement from needle leaves. Farm experiment took place on control and experimental groups of male calves by the same scheme. Experiment tested ruminal digestion (рН, total amount of volatile fatty acids, ammonium nitrogen content, amylolytic activity, protist and bacterium concentration), biochemical and clinical parameters, average daily and gross weight gain. Energy-vitamin-mineral supplements positively affected microbiological and enzymatic processes in forestomach, increasing total microbial mass, production of volatile fatty acids — by 0.25‒1.13 mmol/100 ml, amylolytic activity of ruminal fluid — by 3.27 U/ml (Р < 0,05). Higher values were obtained for total amount of digested nutrients and digestion coefficients of dry, organic matter, crude protein, crude fat — by 6.9 % (Р < 0,05), crude fiber — by 2.5 %. Sheep blood biochemical characteristics showed improved protein metabolism during the experimental period, leading to higher concentration of total blood protein by 14.1% (Р < 0,05), albumins — by 32.8% (Р <0,05) and albumin/globulin ratio. Gimmers showed higher concentration of blood glucose by 11.4%. Average daily weight gain of male calves exceeded the control group by 6.3%.

scholarly journals Implementing High Energy Liquid Nutrition, Omega-3 Fatty Acids and Nutritional Supplements for the Treatment of Anorexia Nervosa

2017 ◽  
Vol 1 (1) ◽  
pp. 1-12
Author(s):  
Christoph Baumann ◽  
Christian Willaschek ◽  
Tuende Kertess-Szlaninka ◽  
Lang Johanna ◽  
Reiner Buchhorn
Keyword(s):  
Fatty Acids ◽  
Anorexia Nervosa ◽  
Weight Gain ◽  
Nutritional Supplements ◽  
High Energy ◽  
Historical Control ◽  
Control Group ◽  
Omega 3 Fatty Acids ◽  
Omega 3 ◽  
Number Of Patients

Objective: To assess the effect of different treatment approaches on the course of anorexia nervosa (AN) over time. Methods: The subjects were 27 hospitalized AN patients. In our retrospective analysis we compared weight gain in two groups. While one group was treated with a standard oral refeeding protocol (historical control) through January 2013 (N=16), the second group (highly standardized refeeding protocol) received a high energy liquid nutrition and nutritional supplements including omega-3 fatty acids (N=11). Results: On admission, the two groups were comparable in terms of height, weight, age and heart rate. At the end of our monitoring time frame of 25 days, weight gain was 121.4% higher in the highly standardized refeeding protocol group than in the historical control group (66.5 ±52.4 vs 147.3 ±55.7 grams/day; t-Test p=0.004; CI95%: 29.3-132.2). A carbohydrate rich diet clearly improved weight gain if high energy liquid nutrition was replaced by the diet according the patient’s own wishes. About 45% of our patients stated they were vegetarians at admission. However, we could not identify a vegetarian diet as a statistically significant negative prognostic factor for weight gain. Conclusion: The highly standardized refeeding protocol seems to be helpful in malnourished AN patients to improve weight gain without enhancing the risk of a refeeding syndrome. However, further studies with greater number of patients are needed to confirm the effectiveness of our standardized treatment protocol.

scholarly journals APPLICATION OF FEED ADDITIVE BAFASAL IN POULTRY

2020 ◽  
Vol 21 (1) ◽  
pp. 126-129
Author(s):  
I. M. Kushnir ◽  
I. S. Semen ◽  
S. D. Murska ◽  
G.. V. Kolodiy
Keyword(s):  
Weight Gain ◽  
Antimicrobial Agents ◽  
Intestinal Flora ◽  
New Drugs ◽  
Daily Weight Gain ◽  
Feed Additive ◽  
Control Group ◽  
Feed Conversion ◽  
And Control ◽  
Experimental Group

Todays is not possible to overcam the problem of the resistance of microorganisms to antibiotics by the development of new antimicrobial agents. Because the new drugs development is quite long process, and the addiction of microorganisms to the antibiotics occurs very fast, in resulting microorganisms become resistant. Prospective direction in solving the problem of antibiotic resistance is the use of bacteriophages, which lytically acting on the pathogens, not causing any toxic effect on the macroorganism. In the article highlight the use of the feed additive Bafasal, which was made on the basis of a specific bacteriophage to serovars of Salmonella, in particular S. enteritidis, S. typhi, S. paratyphi, S. typhimurium, S. branderburg, S. hadar. Poultry of the experimental group were used Bafasal from 1 to 14 days of the experiment, from the calculation on 10 chickens - 50 cm3 of feed additive dissolved to 0,5 % concentration, and from 15 to 35 days - 100 cm3 of Bafasal dissolved to 0,25 % concentration. As a result in the conducted researches was found out that Bafasal causes an increase of weight gain of broilers, feed conversion. In particular, on the 35th day of the experiment, the average daily weight gain of the chickens of the experimental group was on 4,5 % higher than in broilers of the control group, and the conversion of feed in the experimental and control chicken was 1.74 and 1.93 units, respectively. Herewith, in broilers of the control group were not isolated pathogenic microorganisms, including salmonella. In determining the influence of the feed additive on some representatives of the intestinal flora of broilers was found that, the use of feed additive didnt cause changes in total amount lactic acid and bifidobacteria, in broiler of test and control groups, in the glandular, muscular stomach, duodenum, cecum and colon.

scholarly journals Increase of the growth rate in young pigs while using the feed additive «Natufactant»

2021 ◽  
Vol 9 (1) ◽  
pp. 35-39
Author(s):  
N. A. Begma ◽  
O. I. Musich
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Physiological State ◽  
Live Weight ◽  
Active Surface ◽  
High Energy ◽  
Feed Additives ◽  
Daily Weight Gain ◽  
Feed Additive ◽  
Young Pigs

The improvement of production indicators (feed conversion ratio, average daily body weight gain, growth rate, etc.) in animal husbandry implies a high energy requirement. Such a need can only be met by including fats in the diet. Fat is the main and most efficient source of feed energy, but at the same time, one of the most expensive feed component. Using a fat emulsifier is an increase in the quality of the obtained product and a decrease in its cost. The addition of synthetic emulsifiers is a relatively new opportunity to increase fats’ active surface compared to other widely used feed additives. This reduces the cost for oil in the feed and also a chance to reduce feed total cost. By increasing fats’ active surface, emulsifiers expand the action of lipases and promote micelles formation. Higher the fat percentage in the diet, lower the percentage of its absorption. In high-energy diets without the use of complex emulsifiers, from 36% to 70% of the fat introduced into the feed is not absorbed and is excreted from the body. The beneficial effect of emulsifiers is that the digestibility of fat decreases, and it grows with an increase in the fat level in the diet. An assessment of the effect of the «Natufactant» feed additive on the growth rates of young pigs has been carried out. The maintenance and feeding of pigs were carried out in accordance with the technology adopted on the farm. The nutritional value of the main diet that is used on the farm, as well as after the inclusion of the feed additive «Natufactant», were determined. To conduct research according to the principle of analogs were taking into account the breed, live weight, and general physiological state, two groups of animals of a large white pig breed were created, 25 animals in each, with a live weight of 28 kg. The first group served as a control, and in addition to the main diet, the multicomponent emulsifier «Natufactant» was administered to the piglets of the research group at a dose of 250 g/t of feed, which was given together with the feed once per day. It was found that high average daily gains were obtained from animals to which «Natufactant» was added at the rate of 250 g per 1 ton of compound feed from the first day of the experiment and for 60 days in a row. As a result of the production check, it was found that the introduction of a feed additive into the diet of young pigs made it possible to increase the gross increase in animals’ live weight in comparison with the control, by 10.7 centners with the same level of feeding. New influence aspects of the fat emulsifier usage on the pigs’ physiological state and productivity were disclosed. It has been proven that the inclusion of the «Natufactant» feed additive into the animals’ diet stimulates the digestion processes and assimilation of basic nutrients, improves their physiological state, and increases the average daily weight gain of pigs by 15.3%. The solution to the problem of fats’ digestibility is the creation of new emulsifiers by searching for new molecules and developing effective complexes that have a synergistic effect when one component enhances the work of another. In order to significantly increase the pigs’ productivity and thereby increase the production of pork, it is necessary to ensure sufficient and adequate feeding of animals, taking into account the standards of lipid nutrition. It will also help to improve product quality and reduce production costs.

scholarly journals EFFECTS OF TREATING FABA BEANS WITH FORMALDEHYDE OR VOLATILE FATTY ACIDS ON THE PERFORMANCE OF DAIRY CALVES AND FISTULATED SHEEP

1975 ◽  
Vol 55 (4) ◽  
pp. 705-713 ◽  
Author(s):  
H. R. SHARMA ◽  
J. W. G. NICHOLSON
Keyword(s):  
Fatty Acids ◽  
Weight Gain ◽  
Faba Bean ◽  
Feed Efficiency ◽  
Volatile Fatty Acids ◽  
Rumen Fluid ◽  
Protein A ◽  
Daily Weight Gain ◽  
Total N ◽  
Faba Beans

Twenty-four Holstein calves were allotted to three pelleted diets containing 8.4% soybean meal (SBM) or 18% faba beans treated with water or formaldehyde (FA) to determine the influence on animal performance of reducing the solubility of the faba bean protein. A 1:5 dilution of commercial formalin (37% FA) was applied to the ground faba beans to supply 1.5 g FA/100 g protein. No differences (P > 0.05) were observed in dry matter (DM) intake, weight gain, and feed efficiency among calves fed the three diets for 84 days; but FA treatment of the faba beans tended to improve the daily weight gain and feed efficiency of calves compared with diets containing SBM or water (W)-treated faba beans. FA treatment depressed (P > 0.05) the blood urea N and rumen fluid ammonia N of the calves. Apparent digestibilities of DM, crude protein (CP) and energy, as measured with mature sheep, were not statistically different (P > 0.05) among the three diets. Three sheep fitted with cannulas in the abomasum and ileum were fed diets containing faba beans treated with W, FA or volatile fatty acids (VFA) (57% acetic acid and 39% propionic acid). A slight depression (P > 0.05) in apparent digestibility of CP was observed when FA or VFA-treated faba beans were fed compared to W-faba beans. VFA treatment tended to increase the N retention by sheep compared with W-faba or FA-faba. A significant reduction (P < 0.05) in blood urea and rumen fluid ammonia 1 h after feeding was observed in sheep receiving the FA-faba diet compared with other diets. FA and VFA treatments increased the flow of DM, total N and protein N through the abomasum of sheep compared with W-faba bean diet.

scholarly journals Effect of fosfomycin,Cynara scolymusextract, deoxynivalenol and their combinations on intestinal health of weaned piglets

2018 ◽  
Author(s):  
Guadalupe Martínez ◽  
Susana N. Diéguez ◽  
María B. Fernández Paggi ◽  
María B. Riccio ◽  
Denisa S. Pérez Gaudio ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Enzymatic Activity ◽  
Pathogenic Bacteria ◽  
Volatile Fatty Acids ◽  
Goblet Cells ◽  
Control Group ◽  
Intestinal Health ◽  
Balanced Diet ◽  
Intestinal Mucus ◽  
Enhanced Production

AbstractIntestinal health of weaning piglets was studied after oral treatments with fosfomycin (FOS),Cynara scolymusextract (CSE), deoxynivalenol (DON) and their combinations. Piglets were divided in groups and received different treatments during 15 days, namely DON (1mg/kg of feed), FOS administered into the drinking water (30 mg/kg b.w.), CSE (300 g/ton of feed) and all possible combinations including a control group that received clean balanced diet. At day 15, three piglets from each group were euthanized and gastrointestinal tract samples were immediately taken to evaluate pH, bacteriology (enterobacteria and lactic acid bacteria), volatile fatty acids concentration (VFAs), disaccharidases activity (lactase, sucrase and maltase), histology (intestinal absorptive area [IAA] and goblet cells count) and adherence of bacteria to intestinal mucus. Animals receiving FOS and CSE treatments exhibited evident beneficial intestinal effects compared to animals receiving diets free from these compounds. This was revealed by a lower enterobacteria population together with a lower E/L, an enhanced production of butyric acid, an increased enzymatic activity (particularly maltase), and a greater IAA and goblet cells count along with an increase in pathogenic bacteria adherence to intestinal mucus. Interactions between both treatments resulted in similar beneficial effects as their individual administration. On the contrary, DON produced detrimental effects on intestinal health as a decrease was observed on volatile fatty acids production, enzymatic activity and goblet cells count in animals receiving diets containing sub- toxic concentrations of this mycotoxin. The knowledge of the intestinal effects of these compounds contributes to understand the physiological and pathological gut changes and their potential productive consequences.

scholarly journals PVMS based on the lupine grain and amido-concentrative additives for young cattle feeding

2019 ◽  
pp. 74-83
Author(s):  
V. Radchikov ◽  
V. Tzai ◽  
G. Besarab ◽  
S. Piluk ◽  
S. Serguchev ◽  
...  
Keyword(s):  
Weight Gain ◽  
Total Nitrogen ◽  
Hematological Parameters ◽  
Live Weight ◽  
Daily Weight Gain ◽  
Feed Additive ◽  
Productivity Cost ◽  
Fourth Group ◽  
Group I ◽  
Young Cattle

The protein, vitamin and mineral supplements have been developed and it was studied the efficiency of feeding with them the young cattle in the composition of the grain production. The scientific and farm experiment has been carried out during 62 days. The study was conducted in four groups of bulls with 12 heads in each. The initial live weight at the beginning of the study was about 300–310 kg. Differences in feeding were in the fact that the grain forage for young animals of group I included PVMS No. 1, II – PVMS No. 2, III –PVMS No.3, IV – PVMS No 4. The grain feed is represented mainly by barley. The protein, vitamin and mineral supplement replenished 20 % of the deficient protein. It was discovered that concentration of hydrogen ions was practically at the same level in the rumen contents of steers of different groups. As for level of ammonia, VFA, total nitrogen, ciliates in the young cattle of I, II and III groups, the differences were insignificant. The concentration of ammonia of group IVcompared to I, II and III group was higher by 15.58, 23.61 and 21.9 %, VFA – by 6.7, 19.4 and 11.1 %, total nitrogen – by 3.32, 31.44 and 24.03 %, ciliates – by 4.35, 14.29 and 9.09 %, respectively. The research results showed that digestibility of protein, fiber and BEV was higher in the fourth group by 1–7 % compared with the rest groups (P>0.05). A slight increase in nitrogen deposition was found in IV group of young animals (by 4.7–11.9 %) receiving PVMS with AFA as a source of protein. The use of calcium and phosphorus by animals was almost at the same level. The research helped to determine that the average daily weight gain of animals of all the groups was within the range 629–710 g. The highest was in the fourth group consuming PVMS No. 4 with AFA as a protein component; the second place in terms is occupied by group I – 660 g, consuming PVMS No. 2, which included lupine, AFA and standard DKMK No. 1; PVMS No. 3 with depleted phosphate used as a source of phosphorus, took the last place in terms of this indicator – 629 g. Feed cost per 1 kg of weight gain was the lowest in IV group – 8.77 feed units, in I, II and III groups, it was higher by 8.32 %; 13.68 and 10.83 %, respectively. The cost of sold products from one animal during experiment turned out to be higher for steers that received PVMS No. 4 as compared to I, II and III groups by 6.82, 11.36 and 9.1 %, respectively. Keywords: feed additive, additives, steers, growth energy, digestibility, hematological parameters, live weight, productivity, cost price.

scholarly journals EFFECTS OF DIETARY SODIUM MONENSIN ON THE METABOLIC AND HORMONAL PROFILES OF DAIRY GOATS DURING THE PERIPARTUM PERIOD

2018 ◽  
Vol 19 (0) ◽  
Author(s):  
Cleyber José Trindade de Fátima ◽  
Carla Lopes de Mendonça ◽  
Adony Querubino de Andrade Neto ◽  
Adalberto Freire do Nascimento Júnior ◽  
Sergio Peres Ramos da Silva ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Repeated Measures ◽  
Volatile Fatty Acids ◽  
Chloride Content ◽  
Dietary Sodium ◽  
Control Group ◽  
Sample Collection ◽  
Dairy Goats ◽  
Hormonal Profiles ◽  
Peripartum Period

Abstract This study aimed to investigate the energetic and hormonal profiles of dairy goats fed diets supplemented with monensin during the peripartum period. Eleven pregnant Saanen goats were subdivided into two random groups, a control group (GC) and the monensin group (MG). The MG group received 40 mg sodium monensin per animal per day for 15 days before partum and throughout the subsequent experimental period. Clinical observations and sample collection were performed at 30, 15, and 7 days before birth; on the day of partum; and at 5, 15, and 30 days after birth. The following biochemical and hormonal profile variables analyzed were: cholesterol, triglycerides, glucose, fructosamine, non-esterified fatty acids (NEFAs) and β-hydroxybutyrate (BHB), cortisol, and insulin. The ruminal fluid pH, chloride content, and volatile fatty acids were also measured. Statistical analysis of the data was performed using repeated measures ANOVA (p < 0.05) and Pearson's correlation. At partum, the MG group had lower values of NEFAs and lower acetate/propionate ratio. MG had higher triglycerides during the entire experiment period. The administration of monensin generated benefits in terms of energy parameters, improving the metabolic status of the dairy goats during peripartum.

scholarly journals Prophylactic Use of Meloxicam and Paracetamol in Peripartal Sows Suffering From Postpartum Dysgalactia Syndrome

2020 ◽  
Vol 7 ◽  
Author(s):  
Alexandra Schoos ◽  
Ilias Chantziaras ◽  
Jordy Vandenabeele ◽  
Evelien Biebaut ◽  
Evelyne Meyer ◽  
...  
Keyword(s):  
Weight Gain ◽  
Rectal Temperature ◽  
Group Treatment ◽  
Acute Phase Proteins ◽  
Treated Group ◽  
Daily Weight Gain ◽  
Control Group ◽  
Gestation Length ◽  
Amyloid A ◽  
Health Parameters

Postpartum dysgalactia syndrome (PPDS) is a major economic problem in modern sow farms. General treatment of PPDS consists of the use of oxytocin to promote milk ejection and non-steroidal anti-inflammatory drugs (NSAIDs) to alleviate inflammatory processes. So far, studies investigated the use of a single administration of NSAIDs after parturition in healthy and non-healthy sows. The current study investigated whether administration of meloxicam or paracetamol in sows prior to parturition improves sow and piglet health as well as performance in a farm with PPDS problems in sows. Sixty sows and 978 piglets from a Belgian farrow-to-finish farm were enrolled. Sows were randomly divided into three groups: a non-treated control group, a meloxicam-treated group and a paracetamol-treated group. Treatment was administered orally for 7 days from gestation day 113 onwards. Performance and health parameters investigated in sows were gestation length, farrowing duration, litter characteristics, colostrum yield and quality (Immunoglobulin G), litter weight gain, weaning-to-estrus interval, pregnancy rate, rectal temperature, acute phase proteins and inflammatory markers serum amyloid A, haptoglobin, interferon γ, interleukin 1β and 6 backfat, constipation and feed refusal. Performance and health parameters in piglets were birthweight, average daily weight gain, colostrum intake and mortality. Paracetamol-treated sows showed a significantly (P = 0.04) lower rectal temperature (mean ± SD: 38.09 ± 0.18°C) than the meloxicam-treated sows (38.24 ± 0.18°C), but not than the control group (38.22 ± 0.18°C). Sows of the paracetamol-treated group had a significantly (P = 0.001) longer gestation length (116.3 ± 0.9 days) than sows of the control group (115.3 ± 0.6 days), but not than meloxicam-treated sows (115.9 ± 0.9 days). No significant differences between the three groups were found for all the other parameters. In conclusion, the prophylactic oral administration of either meloxicam or paracetamol for 7 days starting 2 days prior to farrowing did not show beneficial effects on both health and performance parameters of sows and piglets.

scholarly journals The effect of the absence of rumen ciliate protozoa on growing lambs fed on a roughage–concentrate diet

1971 ◽  
Vol 26 (2) ◽  
pp. 155-167 ◽  
Author(s):  
J. Margaret Eadie ◽  
J. C. Gill
Keyword(s):  
Fatty Acids ◽  
Weight Gain ◽  
Volatile Fatty Acids ◽  
Soluble Sugar ◽  
Group Differences ◽  
Rumen Bacteria ◽  
Body Measurements ◽  
Large Numbers ◽  
Per Se ◽  
Ciliate Protozoa

1. Lambs were removed form their dams at 2 d of age, and at 5 weeks of age eitht of one group were incoulated with a mixed rumen ciliate and seven in a second group were maintained ciliate-free throughout the 61 weeks of the experiment. Performance of the groups was compared when given a 2:1 roughage:concentrate diet as a set ration and withad lib.roughage.2. Mixed ciliate populations developed in all faunated lambs and average-sized populations were maintained. Large numbers of flagellate protozoa developed in the ciliate-free animals after flagellates had been introduced into the building with the ciliate-free animals after flagellates had been introduced into the building with the ciliate inoculum.3. Higher numbers of rumen bacteria were found in the ciliate-free group.4. Only between the 14th and 21st weeks was there a significant different between groups in weight gain and this was infavour of the faunated group. The only significant different in body measurements was greater girth in the ciliate-free lambs.5. Only minor differences were found between the groups in calorimetric trials, digestibility and nitrogen balanes. There were no differences between groups in concentration of total protein N and soluble sugar in the rumen. The ammonis concentration was significantly higher in the faunated group.6. The concentrations of total rumen volatile fatty acids (VFA) were higher in the faunated group. Differences, between groups, in proportions of VFA were attributed to the activity of the rumen bacteria rather than the ciliatesper se.7. No differences between groups were found in the concentrations of blood sugar and haemoglobin.8. It was concluded that the changes due to the presence of rumen ciliates were not great enough to be reflected in animal performance under the conditions of this experiment.

Effects of dietary selenium-yeast concentrations on growth performance and carcass composition of ducks

2017 ◽  
Vol 57 (8) ◽  
pp. 1731 ◽  
Author(s):  
Milan Ž. Baltić ◽  
Marija Dokmanović Starčević ◽  
Meho Bašić ◽  
Amir Zenunović ◽  
Jelena Ivanović ◽  
...  
Keyword(s):  
Weight Gain ◽  
Growth Performance ◽  
Subcutaneous Fat ◽  
Conversion Ratio ◽  
Carcass Composition ◽  
Feed Conversion Ratio ◽  
Daily Weight Gain ◽  
Control Group ◽  
Feed Conversion ◽  
Dressing Percentage

The aim of the present study was to assess effects of selenium (Se)-yeast diet supplementation on performance and carcass composition in ducks. The study was performed on 240 1-day old ducklings of the same origin (Cherry Valley hybrid), during a 49-day period, which were fed diets supplemented with the following four different levels of Se yeast (ALKOSEL® R397): groups with Se at 0 mg/kg of the diet as-fed, 0.2 mg/kg, 0.4 mg/kg and 0.6 mg/kg. Growth performance (bodyweight, daily weight gain, daily feed intake, feed-conversion ratio) and carcass characteristics (hot and cold carcass weight, chilling losses, dressing percentage, carcass cut yields, and percentage of tissues in breast and thighs with drumsticks) of the ducks were determined. Animals fed high-Se diets (0.4 mg/kg) had higher (P &lt; 0.05) final bodyweight and daily weight gain (from 15 to 49 days) compared with those fed diets with inadequate (0 mg/kg) or with supranutritional (0.6 mg/kg) Se levels. Ducks fed only with basal diet showed a higher (P &lt; 0.05) feed-conversion ratio (from 15 to 49 days) compared with those supplemented with Se at 0.4 mg/kg and 0.6 mg/kg. Dressing percentage was higher (P &lt; 0.01) in the control group (69.50%) than in the group with Se added at 0.6 mg/kg (66.85%). The weights of basic cuts from the duck carcasses did not significantly differ among compared groups. Moreover, the percentage of skin with subcutaneous fat in breast and thighs with drumsticks increased in Se-supplemented groups compared with the control group, while the opposite was determined with the percentage of muscle. It was concluded that a diet containing 0.4 mg of added Se per kilogram produced the greatest growth-performance results in ducks.

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