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Subject: Poultry Science × End date: 2019 × Start date: 2010 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    INFLUENCE OF DIETARY INORGANIC, ORGANIC AND NANO SELENIUM ON EGG PRODUCTION AND MEAT QUALITY IN CHICKEN
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR- 585 401, 2018-08) PRASOON, S.; Prof. JAYANAIK
    Two biological trials were conducted to evaluate the effect of supplementation of sodium selenite, selenium yeast and nano selenium on the growth performance and meat quality of Giriraja chicken up to eight weeks in trial I and egg production and hatchability percentage of Red Cornish hens from 29 to 52 weeks in Trail II. Both the trials had eight treatments with 384 birds (48 per treatment) in the trial I and 288 birds (36 per treatment) in the II trial. Control diet was formulated according to NRC (1994) specifications. To the basal diet (T1), sodium selenite at 150 ppb and 300 ppb, selenium yeast at 150ppb and 300ppb and nano-selenium at 50 ppb, 150 ppb and 300 ppb were added to form T2, T3, T4, T5, T6, T7 and T8. Cumulative body weight, feed intake, FCR, carcass yield, immune organ weight index, total blood count, haemoglobin concentration, H/L ratio, antibody titer against NDV and IBDV, egg quality parameters and survivability percentage were not influenced by selenium supplementation. Supplementation of 300 ppb selenium yeast and, 150 and 300ppb nano selenium significantly (P≤0.05) increased serum globulin level and decreased A:G ratio. Activity of GPx, SOD and CAT in liver was significantly (P≤0.05) improved by supplementation of 300 ppb selenium from all sources. Malondialdehyde concentration in breast muscle was decreased by supplementation of selenium yeast and nano selenium. Drip loss was reduced significantly in T4, T5, T6 and T8. Cooking loss was reduced by supplementation of 300 ppb selenium yeast and 50, 150 and 300 ppb nano selenium. Selenium supplementation improved selenium concentration in muscle and egg, HHEP%, HDEP%, feed efficiency, fertility and hatchability percentage. Cost of production of an egg was reduced by supplementation of selenium.
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    ThesisItemOpen Access
    EFFECT OF GRADED DIETARY LEVELS OF YEAST CELL EXTRACTED NUCLEOTIDES (YEN) ON PERFORMANCE, GUT HEALTH AND IMMUNE STATUS OF COMMERCIAL BROILERS
    (KARNATAKA VETERINARY ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR-585 401, 2018-07) H.C. INDRESH; Dr. JAYANAIK
    An experiment was conducted to study the effect of graded levels of yeast cell extracted nucleotide (YEN) on performance, carcass characteristics, organometry, blood biochemical profile and gut health of commercial broilers. Three hundred day-old straight run commercial broiler chicks were distributed in to 30 replicates of 10 chicks. Basal diet (control) T1 and the experimental diets were prepared by incorporating YEN @ 1, 2 and 3 % for pre-starter for 0-14 days (T2, T3 and T4), starter for 15-28 days (T5, T6 and T7) and finisher phases for 29-42 days (T8, T9 and T10). The results revealed that feeding of YEN at 2 and 3 per cent for 28 days and 42 days resulted in significant (P≤0.05) improvement in body weight, feed intake, FCR and survivability. Improvement in immune organ weight and antibody titre against Newcastle disease was observed only in birds fed YEN up to 28 and 42 days as compared to control and 14 days. The carcass traits and visceral organ weight were significantly (P≤0.05) influenced by feeding birds with 2 and 3 per cent YEN upto 28 and 42 days. Feeding of birds with graded levels of YEN for entire 42 days significantly (P≤0.05) improved the gut pH, intestinal thickness, villi height and crypt depth of intestine compared to that of control. The inclusion of YEN at different levels till 42 days significantly (P≤0.05) decreased the load of E. coli and improved the load of Lactobacillus in the intestine. The feeding of 2 and 3 per cent YEN up to 28 days was more economical compared to other levels of inclusion of YEN for different period. It was concluded that the dietary inclusion of YEN at 2 and 3 per cent for 28 and 42 days was beneficial in improving growth performance, gut health and immune performance in commercial broilers.