| Popis: |
Vitamins and minerals are essential in milk production of dairy cows. This is because these micronutrients are sometime neglected or deficient in the diet. Therefore, supplementation of feed grade vitamins and minerals need to be maximized for improved milk production in dairy cows. The study was carried out to evaluate the effect of selenium and vitamin E on milk yield and composition of Friesian x Bunaji lactating cows. Twenty lactating Friesian x Bunaji cows in their early lactation were used. The study consisted of four treatments with five animals per treatment in a Completely Randomized Design (CRD). Treatment I served as control without selenium or vitamin E supplementation, Treatment II was supplemented with 3 mg of feed grade selenium; Treatment III, with 20 mg of feed grade Vitamin E; and Treatment IV was administered a combination of 3 mg feed grade selenium and 20 mg of vitamin E. The treatments were given once a week, while the animals were given free access to feed and water provided ad libitum. The cows were fed the treatment diets once a week until calving and milked for 90 days. Milk yield and ash content were higher (P0.05). Magnesium (14.73 – 81.27 mg/l), potassium (1700.30 – 2449.80 mg/l) and phosphorus (1362.90 – 2151.50 mg/l) had higher (P 0,05). Magnésium (14,73 - 81,27 mg / L), potassium (1700,30 - 2449.80 mg / L) et phosphore (1362,90 - 2151.50 mg / L) avaient plus élevé (p |
