The aim of the study was to assess the effect of dried fermented rapeseed meal (FRSM) in diets for sows on blood redox and immunological parameters, taking into account the physiological period (pregnancy or lactation) and age (primiparous vs multiparous sows). The experiment also aimed to determine how FRSM administered to pregnant sows, affects the antioxidant and immune systems of piglets. The animals were divided into 4 groups of 15 animals each. Control groups of primiparous (CG) and multiparous sows (CS) received a standard diet for pregnant or lactating sows. Experimental groups of primiparous (EG) and multiparous sows (ES) received feed with a 4% share of FRSM in place of soybean meal up to day 100 of gestation, 9% share of FRSM from day 100 of gestation to day 7 of lactation, and then again 4% share of FRSM until the end of lactation. In the blood plasma of pregnant sows fed diet with FRSM addition, higher FRAP value and vitamin C, uric acid (UA), immunoglobulin IgG content, lymphocytes (LYM) count and a lower content of malondialdehyde (MDA), lipid hydroperoxides (LOH), immunoglobulin IgM was noted than in the blood plasma of control sows. Both primiparous and multiparous lactation sows whose feed included FRSM had higher catalase (CAT) activity, higher FRAP, vitamin C, immunoglobulin IgG and IL-6 content, and lower UA content than the control sows. Piglets born to sows fed diet with FRSM addition had significantly higher FRAP values, vitamin C, IgG, and IL-6 content and white blood cells (WBC) count and lower MDA and UA content in the blood plasma than piglets born to sows from control group. Multiparous sows compared to primiparous sows had higher CAT activity, and higher vitamin C, LOH, creatinine (CREAT), and IgM content. Elevated FRAP, and CREAT levels and reduced MDA content were also observed in the plasma of the multiparous sows compared to primiparous sows during lactation. Multiparous lactation sows compared to primiparous sows had lower WBC count, and IgG and IgM content. Piglets born to multiparous sows had higher FRAP values, LOH content and IgA content while lower MDA content compared to piglets born to primiparous sows. The inclusion of dried fermented rapeseed meal in feed for sows significantly stimulates antioxidant processes in primiparous and multiparous sows and in their piglets. The inclusion of dried fermented rapeseed meal in the diet of sows stimulates antioxidant processes in primiparous and multiparous sows and in their piglets. This is responsible for stimulation of the immune system (increased LYM counts and IgG titres in the blood plasma). The improved antioxidant status in the plasma suggests that dried fermented rapeseed meal stimulated the immune system of pregnant and lactating sows and their newborn offspring.
Keywords
- fermented rapeseed meal
- sows
- piglets
- antioxidant
- immune system
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