vetpressАграрная наукаAgrarian science0869-81552686-701XРедакция журнала "Аграрная наука"10.32634/0869-8155-2024-386-9-54-59vetpress-3269Research ArticleЗООТЕХНИЯZOOTECHNICSВлияние разных уровней L-изолейцина в комбикормах на рост тиляпии (Oreochromis niloticus)The effect of different levels of L-isoleucine in compound feeds on the growth of tilapia (Oreochromis niloticus)https://orcid.org/0009-0007-1930-808XСалехХ.SalehH.

Хатем Салех, аспирант

ул. Тимирязевская, 54, Москва, 127434

Hatem Saleh, Graduate Student

54 Timiryazevskaya Str., Moscow, 127434

hatemsaleh193@gmail.comhttps://orcid.org/0009-0001-1786-0862ХамвиМ. Н.HamwiM. N.

Мохамад Навар Хамви, аспирант

ул. Тимирязевская, 54, Москва, 127434

Mohamad Nawar Hamwi, Graduate Student

54 Timiryazevskaya Str., Moscow, 127434

nawarhamwi@gmail.comРоссийский государственный аграрный университет — МСХА им. К.А. ТимирязевРоссияRussian Timiryazev State Agrarian UniversityRussian Federation202411102024195459Copyright © Салех Х., Хамви М.Н., 20242024Салех Х., Хамви М.Н.Saleh H., Hamwi M.N.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.vetpress.ru/jour/article/view/3269

Были разработаны четыре рациона, включающие контроль (основной рацион), который фактически содержал 34,00% сырого протеина, в то время как остальные три содержали белок, близкий к данному значению с учетом погрешности измерения, и изолейцин в 2-й, 3-й и 4-й группах 4,9%, 8,51% и 12,12% соответственно. Изучение влияния добавок L-изолейцина в комбикормах на рост тиляпии (Oreochromis niloticus) показало, что варьирование концентрации этой аминокислоты оказывает значительное влияние на показатели роста рыбы. Корректировка дозировок позволяет достичь более эффективного использования кормов в условиях аквакультуры. Установлено, что при введении в рацион аминокислоты изолейцина конверсия корма снижается на 0,64 пункта при дополнительной концентрации на 1,42 г/кг корма (4,9%), на 0,88 пункта при дополнительном введении изолейцина на 1,55 г/кг корма (8,51%), на 0,76 пункта при дополнительной концентрации на 1,68 г/кг корма (12,12%). Показано, что лучшей группой с самым низким коэффициентом конверсией корма была 3-я группа, в которой аминокислота изолейцин введена в рацион на 8,51% больше, чем в других группах. Оптимальный уровень введения изолейцина в корм для тиляпии — 1,55 г/кг корма (8,51%). Было обнаружено, что содержание золы в тушке O. niloticus увеличивается на 0,8%, жира — на 1% в мышцах по сравнению с контролем.

Four diets were developed, including the control (main diet), which actually contained 34.00% crude protein, while the other three contained protein close to this value, taking into account the measurement error, and isoleucine in groups 2, 3 and 4, 4.9%, 8.51% and 12.12%, respectively. The study of the effect of L-isoleucine additives in compound feeds on the growth of tilapia (Oreochromis niloticus) showed that varying the concentration of this amino acid has a significant effect on fish growth rates. Adjusting dosages makes it possible to achieve more efficient use of feed in aquaculture conditions. It was found that when the amino acid isoleucine is introduced into the diet, feed conversion decreases by 0.64 points with an additional concentration of 1.42 g/kg of feed (4.9%), by 0.88 points with additional administration of isoleucine by 1.55 g/kg of feed (8.51%), by 0.76 points with an additional concentration of 1.68 g/kg of feed (12.12%). It was shown that the best group with the lowest feed conversion rate was the 3rd group, in which the amino acid isoleucine was introduced into the diet by 8.51% more than in other groups. The optimal level of isoleucine administration in tilapia feed is 1.55 g/kg of feed (8.51%). It was found that the ash content in the carcass of O. niloticus increased by 0.8%, fat — by 1% in muscles compared with the control.

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The authors declare that there are no conflicts of interest present.