Antioxidant Activity and Milk Fatty Acids Profile of Murciano-Granadina Dairy Goats Feeding Formaldehyde-Treated Sesame Meal at Different Levels of Dietary Crude Protein
محورهای موضوعی :F. Firozi 1 , O. Dayani 2 , B. Hajimohammadi Darabi 3
1 - Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
2 - Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
3 - Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
کلید واژه: antioxidant, formaldehyde treatment, lactating goat, milk yield, sesame meal,
چکیده مقاله :
We evaluated the impact of partial substitution of soybean meal (SBM) for sesame meal (SM) and formal-dehyde-treated SM (FTSM) on milk yield and fatty acids, and blood and milk antioxidant parameters in goats. Forty mid-lactation Murciano-Granadina goats were randomly allocated to four groups: (1) diet with 16.5% crude protein (CP) containing SBM (CON); (2) diet with 16.5% CP containing untreated SM (USM); (3) diet with 16.5% CP containing FTSM (FT); (4) diet with 14.5% CP containing FTSM (LPFT; low protein formaldehyde-treated SM). FT goats had higher dry matter intake (DMI) than CON and LPFT, as observed for milk, fat-corrected (FCM), and energy-corrected milk (ECM) (P<0.05). LPFT reduced C6:0 and C10:0 FAs in milk comparison to CON and USM, while C8:0 and C12:0 were higher CON and/or USM as compared with LPFT (P<0.01). The results showed that FTSM goats had the lowest BUN level (P=0.004). As compared with SBM and FTSM fed groups, the concentration of blood glutathione peroxi-dase (GPX) was lower in USM goats (P<0.01). Partial substitution of SBM for FTSM in the diet of dairy goats can improve milk yield. Furthermore, reducing CP level along with FTSM inclusion in the diet may be considered as a proper tool in compensating the adverse effects of CP deficiency and to optimize the productive performance of dairy goats utilizing lower amounts of nitrogen sources.
We evaluated the impact of partial substitution of soybean meal (SBM) for sesame meal (SM) and formal-dehyde-treated SM (FTSM) on milk yield and fatty acids, and blood and milk antioxidant parameters in goats. Forty mid-lactation Murciano-Granadina goats were randomly allocated to four groups: (1) diet with 16.5% crude protein (CP) containing SBM (CON); (2) diet with 16.5% CP containing untreated SM (USM); (3) diet with 16.5% CP containing FTSM (FT); (4) diet with 14.5% CP containing FTSM (LPFT; low protein formaldehyde-treated SM). FT goats had higher dry matter intake (DMI) than CON and LPFT, as observed for milk, fat-corrected (FCM), and energy-corrected milk (ECM) (P<0.05). LPFT reduced C6:0 and C10:0 FAs in milk comparison to CON and USM, while C8:0 and C12:0 were higher CON and/or USM as compared with LPFT (P<0.01). The results showed that FTSM goats had the lowest BUN level (P=0.004). As compared with SBM and FTSM fed groups, the concentration of blood glutathione peroxi-dase (GPX) was lower in USM goats (P<0.01). Partial substitution of SBM for FTSM in the diet of dairy goats can improve milk yield. Furthermore, reducing CP level along with FTSM inclusion in the diet may be considered as a proper tool in compensating the adverse effects of CP deficiency and to optimize the productive performance of dairy goats utilizing lower amounts of nitrogen sources.
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