The results of studies on the optimal level of zinc, which are additionally introduced into feed for rabbits grown for meat, are presented. Experimental researches were conducted in the conditions of the problematic research laboratory of feed additives of the National University of Life and Environmental Sciences of Ukraine. A scientific and economic experiment was carried out on young rabbits of HYLA hybrids of the French company EUROLAP. The study was conducted by group method. In the 42-day age, 60 rabbits were selected, out of which, according to the analogues principle, three groups were formed – one control and two experimental, with 20 rabbits (10 females and 10 males) in each. The research lasted for 42 days. It was used full-grain granulated feed for feeding the experimental young rabbits, which according to the chemical composition differed in content of zinc in them. Rabbits of the control group received feed containing zinc 50 mg/kg, the second – 100 mg/kg, the third – 150 mg/kg. It was established that feeding of rabbits in the 43–84-day-old age with feed containing zinc 100 mg/kg contributes to an increase in body weight by 2.9%, and an increase in average daily growth during the growing season, respectively, by 4.7%. Feed costs per 1 kg growth in young rabbits consuming feed containing Zinc were 1.0% lower than the control group's young. Rabbits which were fed with feed containing zinc 150 mg/kg were inferior to body weight and average daily increments, respectively, by 1.4% and 2.7% of animals fed with a feed with a zinc level of 50 mg/kg.
The article presents the results of experimental studies on the influence of various levels of methionine in feed on the productivity of growing rabbits. The research was conducted in the conditions of the problematic research laboratory of feed additives of the National University of Life and Environmental Sciences of Ukraine. Experiment was carried out on young rabbits HYLA hybrids of the French company EUROLAP, of which, on the principle of analogues, four groups were formed – control and 3 experimental, with 20 heads (10 females and 10 males) in each. The experiment lasted 42 days. Every week we conducted individual weighings of the experimental animals, calculation of weight gains and feed costs. For feeding of the experimental rabbits were used diets, which were balanced by energy and main nutritional elements, but differed in the content of methionine – the rabbits of the control group consumed feed containing methionine 0.29%, the second – 0.41%, the third – 0.54%, the fourth – 0.66%. Diet consisted of wheat bran, sunflower meal, sunflower hulls, alfalfa grass meal, premix and bone concentrate. At the 84th day of age, the largest body weight was in rabbits, which consumed feed containing methionine 0.41% – 3005.4 g, which is on 3.2% (P < 0.01) more than in the control. Over the entire period of the experiment largest absolute increase was observed in rabbits of second group (0.41% of methionine) and preponderated the indicator of animals of control group at 5.7% (P < 0.001). The average daily gain for the entire period of the experiment was the highest in rabbits of the second group, which was on 5.8% (P < 0.001) more than in control. Calculations of feed costs for the period of growth 42–84 days indicate that the rabbits that consumed a feed containing 0.66% methionine per 1 kg of body weight gain consumed it by 2.3% less than control, and those who consumed feed with contents 0.54% methionine – by 1.5% less, 0.41% methionine – by 1.2% less. According to experimental results, we can conclude that for maximum increases in body weight with moderate cost of feed per unit of weight must use diet containing methionine 0.41%.
Experimental studies conducted in terms of problem research laboratory of feed additives National University of Life and Environmental Sciences of Ukraine. Independent experiment was conducted with growing Pharaoh Coturnix quails to determine the optimal valine-to-protein ratio for quail development. We conducted a randomized block experiment with 4 treatments, each with 5 replicates of 25 growing birds (1 to 35 d of age). A diet consisting of soybean and sunflower meal, wheat, corn, Fish meal, sunflower oil, concentrate (28% CP, 2.88 kcal/g on 1 to 21d of age, 20.5 % CP, 2.97 kcal/g on 22 to 35 d of age) having severally 1.54 and 1.33 % valine served as basal feed. Valine was supplemented in four graded levels up to 2.10 g/100 g on 1 to 21d of age and 1.54 g/100 g on 22 to 35 d of age at the expense of L-valine. Diets and water were offered ad libitum. Body weight gain and feed/gain ratio were studied. Quails significantly responded to the increasing valine concentration in growth, feed/gain ratio. Analysis was used to calculate the Valine nutrient recommendations. These estimates were 1.28 % for the starter and 1.23 % for the total Val for the grower period. Supplementation with Valine to the base diet resulted in body weight gain of quails equal to those fed the control diet (p<0.01). Експериментальні дослідження проводились в умовах проблемної науково-дослідної лабораторії кормових добавок Національного університету біоресурсів і природокористування України. Було проведено науково-господарський дослід на молодняку перепелів породи фараон з визначення оптимального рівня валіну. Дослід проводився за методом груп. Птахи були поділені на 5 груп, кожна з яких складалася з 4 підгруп по 25 добових перепелів кожна (перепелів вирощували від 1 до 35 діб). Базові комбікорми, що складалися з соєвої макухи, соняшникового шроту, пшениці, кукурудзи, рибного борошна, соняшникової олії та концентрату (28 % СП, 2,88 ккал/г у віці від 1 до 21 діб, 20,5 % СП, 2,97 ккал/г у віці від 22 до 35 діб), містили відповідно 1,54 та 1,33 % валіну. Вміст валіну збільшували у інших чотирьох групах відповідно до 2,10 г/100 г та 1,54 г/ 100 г за рахунок додавання L-валіну. Комбікорми та воду перепели отримували вволю. Встановлено збільшення маси тіла та зменшення витрат корму на 1 кг приросту маси тіла залежно від рівня валіну в кормі. Перепели не лінійно відреагували на підвищення рівня валіну в раціоні. Проаналізувавши результати досліджень було рекомендовано використовувати комбікорм з рівнем валіну 1,28% для стартового періоду і 1,23% для ростового періоду вирощування. Додаткове введення валіну сприяло збільшенню маси тіла перепелів (р<0,01), а витрати корму на 1 кг приросту були на 2,3 % меншими за контроль. Ключові слова: перепели; L-валін; маса тіла; конверсія корму; комбікорм
А. М. ОМЕЛЬЯН, провідний фахівець відділу наукової ате стації, Ю. В. ПОЗНЯКОВСЬКИЙ, кандидат сільськогосподарських наук, старший викладач кафедри годівлі тварин та технології кормів ім. П. Д. Пшеничного К. І. МАХНО, кандидат сільськогосподарських наук, старший викладач кафедри годівлі тварин та технології кормів ім. П. Д. Пшеничного Національний університет біоресурсів і природокористування України
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.