H. Mansoori and A. Aghazadeh and K. Nazeradl
Heattreated or Raw Sunflower Seeds in Lactating Dairy Cows Diets Effects on Milk Fatty Acids Profile and Milk Production
2159 - 2167
2010
4
11
International Journal of Nutrition and Food Engineering
https://publications.waset.org/pdf/15184
https://publications.waset.org/vol/47
World Academy of Science, Engineering and Technology
The objective of this study was to investigate the effects of dietary supplementation with raw or heattreated sunflower oil seed with two levels of 7.5 or 15 on unsaturated fatty acids in milk fat and performances of highyielding lactating cows. Twenty early lactating Holstein cows were used in a complete randomized design. Treatments included 1) CON, control (without sunflower oil seed). 2) LSUT, 7.5 raw sunflower oil seed. 3) LSHT, 7.5 heattreated sunflower oil seed. 4) HSUT, 15 raw sunflower oil seed. 5) HSHT, 15 heattreated sunflower oil seed. Experimental period lasted for 4 wk, with first 2 wk used for adaptation to the diets. Supplementation with 7.5 raw sunflower seed (LSUT) tended to decrease milk yield, with 28.37 kgd compared with the control (34.75 kgd). Milk fat percentage was increased with the HSUT treatment that obtained 3.71 compared with CON that was 3.39 and without significant different. Milk protein percent was decreased high level sunflower oil seed treatments (15) with 3.18 whereas CON treatment is caused 3.40 protein. The cows fed added low sunflower heattreated (LSHT) produced milk with the highest content of total unsaturated fatty acid with 32.59 g100g of milk fat compared with the HSUT with 23.59 g100g of milk fat. Content of C18 unsaturated fatty acids in milk fat increased from 21.68 g100g of fat in the HSUT to 22.50, 23.98, 27.39 and 30.30 g100g of fat from the cow fed HSHT, CON, LSUT and LSHT treatments, respectively. C182 isomers of fatty acid in milk were greater by LSHT supplementation with significant effect (P < 0.05). Total of C18 unsaturated fatty acids content was significantly higher in milk of animal fed added low heattreated sunflower (7.5) than those fed with high sunflower. In all, results of this study showed that diet cow&39;s supplementation with sunflower oil seed tended to reduce milk production of lactating cows but can improve C18 UFA (Unsaturated Fatty Acid) content in milk fat. 7.5 level of sunflower oil seed that heated seemed to be the optimal source to increase UFA production.
Open Science Index 47, 2010