Agronomy journal, Vol. 33 No. 9-10, 1971.
Original scientific paper
THE EXPLORATION OF THE FORAGE BASE FOR BREED COWS IN CENTRAL CROATIA
Branimir Gjurašin
; Viša poljoprivredna škola Križevci i zavod za poljoprivredna istraživanja Križevci
Abstract
For this exploration 40 individual farms have been selected totaling 147 cows of the Siementhal race. The explorations have been performed in 1968 and 1969. On the basis of the results obtained we have drawn the following conclusions: 1. Because of the great share of cornstraw (28,36%) and because of the bad quality hay and because of the low share of silage in the winter feeding, the share of concentrate was very high (28,80%) from the total quantity of energy), the lactation being moderate (10,03 kg a day) Table 3. 2. Because of the low amounts of green fodder available in summer feeding the share of concentrate was rather ligh (17,72% of the total amount of energy) this amount being especially high taking the moderate lactation of 11,5 kg of milk per day in consideration. Table 4. 3. When the shares of each of groups of fodders in the total digestive protein amount in the course of the whole year 1968 are compared to their shares in the energy, we find out that the share of roughages increasced to 84,02% of the total amount of the digestive proteins, and that share of concentrate decreased to 15,98%. Table 5. 4. The high share of cornstraw and of bad quality hay in winter feeding and the the low quantity silage have stipulated rather still high share of concentrates (23,40%). Table 6. If sufficient amounts of high quality rouhages are available silage and good quality) no concentrate will be required providing the day lactation is cca 10 kg of milk. 5. In summer feeding share of rounhages increased (as related to the total energy) to 89,12% and the share of concentrates decreased to only 10,88% of the total digestive proteins. (Table 7). If the cows are continouosly fed with the green forage no concentrates are required providing day milk production is maintained on 11,5 kg of milk.
Keywords
Hrčak ID:
167638
URI
Publication date:
23.11.1971.
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