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استفاده از آنزیم پروتئاز در جیرههای با سطوح مختلف پروتئین و اسیدهایآمینه بر عملکرد، ویژگی های لاشه، قابلیت هضم مواد مغذی و غلظت برخی از فراسنجههای خونی در جوجههای گوشتی | ||
علوم دامی ایران | ||
دوره 55، شماره 1، فروردین 1403، صفحه 163-180 اصل مقاله (1.05 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijas.2023.352781.653924 | ||
نویسندگان | ||
سپیده گزانی1؛ منصور رضایی* 2؛ محمد کاظمی فرد3 | ||
1گروه علوم دامی، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
2گروه علوم دام، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران | ||
3گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران | ||
چکیده | ||
جوجه گوشتی نر سویه راس 308، در سن یک تا 24 روزگی در قالب طرح کاملا" تصادفی با شش جیرهغذایی آزمایشی در چهار تکرار (10 قطعه در هر تکرار) استفاده شد. جیرههای غذایی آزمایشی عبارت بودند از 1. جیره شاهد بر پایه ذرت و کنجاله سویا توصیه شده براساس راهنمای سویه راس 308 2. جیره شاهد با افزودن آنزیم پروتئاز با سطوح توصیه شده (02/0 درصد) 3. جیره که پنج درصد، سطح پروتئین آن کاهش یافته بود 4. جیره با سطوح پایین پروتئین و کاهش غلظت اسیدهای آمینه ضروری (پنج درصد) 5 . جیره با سطوح پایین پروتئین (جیره غذایی آزمایشی سه) با افزودن آنزیم پروتئاز با سطح توصیه شده (02/0 درصد) 6 . جیره با سطوح پایین پروتئین و اسیدهایآمینه ضروری با افزودن آنزیم پروتئاز با سطوح توصیه شده (02/0 درصد). بیشترین میزان مصرف خوراک در دوره آغازین و بیشترین ضریب تبدیل خوراک در دوره رشد و همچنین بیشترین درصد چربی محوطه بطنی مربوط به جیره با سطوح پایین پروتئین و اسیدآمینه بود. آنزیم پروتئاز موجب افزایش وزن بدن و کاهش ضریب تبدیل خوراک در دوره رشد در جیرههای با سطوح پایین پروتئین و اسیدآمینه شد (05/0>.(P استفاده از آنزیم پروتئاز در جیرههای با سطوح پایین پروتئین موجب بهبود قابلیت هضم ماده خشک و ماده آ لی شد و بیشترین درصد ران و طحال و غلظت HDL خون مربوط به جیره با سطوح پایین پروتئین با افزودن آنزیم پروتئاز بود (05/0> .(P بر اساس نتایج، استفاده از آنزیم پروتئاز در جیرههای با سطوح پایین پروتئین و اسید آمینه عملکرد جوجههایگوشتی را بهبود داد. | ||
کلیدواژهها | ||
آنزیم پروتئاز؛ جیره کم پروتئین؛ جوجههای گوشتی؛ قابلیت هضم؛ عملکرد | ||
عنوان مقاله [English] | ||
Use of protease enzyme in diets with different levels of protein and amino acids on performance, carcass characteristics, nutrient digestibility and some blood parameters concentrations in broiler chicks | ||
نویسندگان [English] | ||
Sepideh Gazani1؛ Mansour Rezaei2؛ Mohammad Kazemifard3 | ||
1Department of Animal Science, College of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran | ||
2Department of Animal Sciences, College of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran | ||
3Department of Animal Sciences, College of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran | ||
چکیده [English] | ||
A total of 240 male Ross 308 broiler chicks were allocated in completely randomized design, including six experimental diets with 4 replicates and 10 chicks per replicate. Experimentaldiets include 1- a control diet based on corn and soybean meal, recommended according to the guide of Ross strain (308) 2- a control diet with the addition of protease enzyme with recommended levels (0/02 %) 3- low protein diet (five percent reduction) 4- Diet with low levels of protein and essential amino acids (five percent reduction) 5- Diet with low levels of protein (experimental diet three) with the addition of protease enzyme with recommended levels (0/02 %) 6- Diet with low levels of protein and essential amino acids with the addition of protease enzyme with recommended levels (0/02 %).The highest amount of feed consumption in the starter period and the highest feed conversion ratio in the growth period, as well as the highest percentage of abdominal fat, were related to the diet with low levels of protein and amino acids. Protease enzyme increased the body weight and decreased the feed conversion ratio during the growth period in diets with low levels of protein and amino acids (P<0.05).The use of protease enzyme in diets with low protein levels improved the digestibility of dry matter and organic matter, and the highest percentage of thigh and spleen and blood HDL concentration was related to the diet with low protein levels with the addition of protease enzyme (P<0.05). Based on the results, use of protease enzyme in diets with low levels of protein and amino acid improved the performance of broiler chickens. | ||
کلیدواژهها [English] | ||
protease enzyme, low protein diet, broilers, digestibility, performance | ||
مراجع | ||
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