Efficiency for production, digestibility and cost of simple types of basic feed rations for dairy cows
Dedek, J.; Brazda, M.; Cerny, P.
Zivocisna Vyroba 16(10-11): 763-778
ISSN/ISBN: 0044-4847 Accession: 014456348
A trial of 4 x 2 x 4 factorial design was carried out between the end of Jan. and end of May 1970 on 16 Bohemian Red Pied cows initially at the beginning of lactation. 4 basic feeds, (i) lucerne haylage (45% DM) + carbohydrate supplement; (ii) maize silage + protein supplement, (iii) beet slices and tops silage + lucerne haylage, and (iv) maize silage + urea were tested, using cereals + urea or cereals + protein supplement as concentrates, as well as 4 Ca: P dietary ratios (-1: 1, 2: 1, 3: 1 or 4: 1). Total daily DM intakes (kg) and FCM yields/cow (kg) and milk fat % for (i)-(iv) were: 15-04, 14-54 and 4.07; 12-19, 13-56 and 4.11; 13-90, 14-56 and 4.00; and 12-23, 13-76 and 4-16. Highest digestibilities of organic nutrients were with (ii) and particularly (iv). Under the maize-growing and beet-growing conditions of the district where the tests were carried out, (iv) was most and (i) least suitable from the viewpoints of milk production efficiency and cost.