Effect of Dietary Rapeseed Meal on Fatty Acid Profile of Lamb Carcass
محورهای موضوعی : Camel
1 - Department of Animal Nutrition and Feed Technologies, Institute of Animal Science, 2232, Kostinbrod, Bulgaria
کلید واژه: carcass, Fatty Acids, lamb, meal, Rapeseed,
چکیده مقاله :
The objectives of this study were to determine the effects of feeding rapeseed (27%, DM basis) and sunflower biodiesel by-products as protein supplements on fatty acid composition (FA), profile (ratios and indices),enzyme activitiesfrom thecarcassin lambs fed cereal-based diets. Simultaneously, itwas examined the relationship between ingested FA and carcass FA. Samples were obtaine dfrommal efattened lambs (n=10, Bulgarian synthetic dairy population, 146-daged, final body weight FBW= 36.95±0.91 kg) involved attwoiso-caloric, iso-nitrogenous and equalin calcium: phosphorus (Ca:P) ratio dietary treatments: control–with sunflower meal (SFD) and experimental–with rapeseed meal (RSD). Lipids,extracted from carcasswere analyzed for FA profile. Animals feeding RSDhad significantly higher (P<0.01) performance (FBW=38.80 vs. 35.1 kg) and meat yield (5.26 vs. 4.67 kg). RSDincreased C18:3 (P<0.01) and C18:3 / CLA (P<0.05), butdecreased (P<0.01) C18:2 / C18:3 ratio compared with SFD. Deduced relationships between ingested dietary FA and carcassFA showsgood parity and high correlation (R>0.55). In conclusion, animals feeding RSD, as a method to modify carcassFAs, decreased the amount of saturated and polyunsaturated FA, and increased monounsaturated, total unsaturated and desirable FAs of carcass.
موضوع این مطالعه تعیین اثرات تغذیه کنجالههای منداب (27 درصد بر اساس ماده خشک) و آفتابگردان به عنوان مکمل-های پروتئینی روی ترکیب اسید چرب، پروفایل (نسبتها و شاخصها)، فعالیت آنزیمی لاشه در برههای تغذیه شده با جیره-های بر پایه دانه غلات بود. در این آزمایش، همچنین ارتباط بین اسید چرب هضم شده و اسید چرب لاشه بررسی شد. نمونهها از برهها نر پروار (جمعیت سنتتیک شیری بلغاری با سن 146 روز و وزن بدن پایانی 91/0±95/36 کیلوگرم) با دو تیمار جیره-ای یکسان از نظر انرژی، پروتئین و نسبت کلسیم به فسفر به دست آمدند. تیمارهای جیرهای شامل گروه شاهد (حاوی کنجاله آفتابگردان) و آزمایشی (حاوی کنجاله منداب) بودند. چربی لاشه برای پروفایل اسید چرب مورد آنالیز قرار گرفتند. حیوانات تغذیه شده با کنجاله منداب به طور معنیداری (01/0P<) عملکرد (8/38 در مقابل 1/35 کیلوگرم) و وزن نصف لاشه (26/5 در مقابل 67/4 کیلوگرم) بالاتری بودند. کنجاله منداب در مقایسه با کنجاله آفتابگردان، C18:3 (01/0P<) و C18:3 / CLA(05/0P<) را افزایش ولی نسبت C18:2 / C18:3(01/0P<) را کاهش داد. همبستگی بالا و خوبی بین اسید چرب جیرهای هضم شده و اسید چرب لاشه مشاهده شد (05/0P<). نتیجه اینکه، تغذیه حیوانات با کنجاله منداب به عنوان یک روش برای اصلاح اسیدهای چرب لاشه، کاهش مقدار اسیدهای چرب اشباع و اسیدهای چرب غیر اشباع با چندین پیوند دوگانه و افزایش اسیدهای چرب غیر اشباع با یک پیوند دوگانه، اسیدهای چرب غیر اشباع و مفید لاشه پیشنهاد میشود.
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