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EFFECTS OF DIFFERENT PROPORTIONS OF VOLUMINOUS FODDER IN COMPLETE RATIONS ON PRODUCTION RESULTS OF HF COWS
Zvonimir Uremović
; Fakultet poljoprivrednih znanosti Zagreb, Zagreb, Republika Hrvatska
Marija Uremović
; Fakultet poljoprivrednih znanosti Zagreb, Zagreb, Republika Hrvatska
Darko Grbeša
; Fakultet poljoprivrednih znanosti Zagreb, Zagreb, Republika Hrvatska
Željko Novaković
; VUPIK, Vukovar, Republika Hrvatska
Sažetak
The effects of different proportions of concentrates and voluminous fodder in dry matter of complete rations (75 : 25 and 65 : 35) on milk yield, milk quality and fertility were studied during an investigation involving 35 HF cows for i period or to days after calving. The feeding of cows with complete rations (75 :25) for 60 days of early lactation led to
an increase in daily milk yield of 7.45 kg or 22.6 % (p<0,01) and total production by 255 kg of 4% FCM or 12,8% (P<0,01), and to a better utilization of net energy of feed per kg of 4% FCM by 0.06 FU or 10% and of digestible proteins by 8g or 13%
The feeding of cows with complete rations (65:35% containing a greater proportion of high-quality fodder had an insignificant effect on the percentage of milk fat (0,14%; P>0.05), on the lenght of the intercalving period (36 days; P>0.05), and-on the number of inseminations per incalf heifer (0.92; P>0.05). The HF cows of the experimental group were in a better state of health because of fewer cases of endometritis (12%; P<0.05), placenta retention (7.5%; P>0.05) and ketosis (3.2%; P>0.05), and this had-a favourable effect on their reproductive efficiency in comparison with the control group of cows.
Ključne riječi
Hrčak ID:
161939
URI
Datum izdavanja:
25.7.1990.
Posjeta: 603 *