نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه جیرفت. جیرفت. ایران
2 استادیار گروه علوم دامی دانشگاه شهید باهنر کرمان
3 فارغ التحصیل دکتری.
4 عضو هیئت علمی گروه علوم دامی، دانشکده کشاورزی، دانشگاه جیرفت
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Abstract
Background and objectives: In recent years, the use of vegetable oils in feeding ruminants has been considered for various reasons, including the production of healthier products. It has been shown that adding oils such as sunflower and soybean oil to the diet can reduce the ratio of saturated fatty acids and increase the ratio of unsaturated fatty acids, especially conjugated linoleic acid in livestock products and increase the health of livestock products for humans. Grape seed oil is obtained from the pulp remaining from the industrial processing of grapes, and about 80 to 90% of its fatty acids are unsaturated fatty acids. Therefore the objective of this study was to investigated the effects of using grape seed oil in the diet on performance, milk composition and milk fatty acids of Raeini goats.
Materials and methods: This experiment was carried out in the Raini goat keeping center in Baft city (km 5 of Sirjan road). The experiment lasted for 21 days. To carry out the study, 20 goats in parity 2 or 3, in the 20 ± 2 days of lactation, average weight of 28 ± 2 kg and milk production of 550 ± 50 grams were selected and randomly divided in the pens. The experiment was conducted in a completely randomized design with four treatments and five replications for each treatment. Experimental treatments include 1) control diet (without grape seed oil), 2) diet containing 1.5% grape seed oil, 3) diet containing 3% Grape seed oil and 4) the diet contained 4.5% of grape seed oil. During the five-day sampling period, daily feed consumption and milk yield were recorded. In the last three days, the milk samples were used to determine the milk composition and the profile of milk fatty acids.
Results: The results of this study showed that performance factors including feed consumption and milk production were not affected by experimental treatments. Also, the experimental treatments did not have a significant effect on the percentage of milk compounds including fat, protein, lactose and non-fat solids. The results also showed that the composition of milk fatty acids was significantly affected by different levels of grape seed oil in the diets and the amount of saturated fatty acids decreased significantly.
Conclusion: The results of this study showed that the use of grape seed oil up to 4.5% in ruminants can improve the quality of milk fatty acids without negatively affecting performance.
کلیدواژهها [English]
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