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INFLUENCE OF ENERGY SOURCE IN DIET DURING PREGNANCY ON PERFORMANCE OF SOWS
Stevo Jančić
; Poljoprivredni fakultet Zagreb
Zdravko Crnojević
; Poljoprivredni fakultet Zagreb
Milovan Pešut
; Poljoprivredni fakultet Zagreb
Hrvoje Ćosić
; Poljoprivreno-industrijski kombinat, Đakovo
Sažetak
The experiment presented herein was undertaken to evaluate the effect of energy source (maize and sorghum) in ration fed during pregnancy on the reproductive and productive performance of sows. Thirty-nine Large White sows were assigned to three different treatment groups at random from pairs formed on the basis of mating date, initial weight, litter order, and boar used in mating. Prior to service all sows were given the same diets to the same scale of feeding. During pregnancy the same scalle of feeding (Table 1), but of different diet structure was given to experimental animals (Table 2). During lactation period sows ,received a daily feed intake of 1.8 kg per day plurs an additional 0.35 kg for every suckling piglets in litter. All sows were intdividualy fed throughout pregnancy and during lactation were collectively fed per treatment groups. The sows were weighed on the day of service, 110th day of pregnancy, at partum and 28th day of lactation period. The piglets were weighed within hours of birth and on 28th day of their life. The control of milk production was carried out weekly during lactation (on days 7, 14, 21 and 28). AII piglets received supplementary iron. Male priglets were castrated at 28 days of age, and creep ration was offered ad litbitum from day 7 to day 28. The piglets were weaned at 4 weeks of age. The obtained data were statistically examined by analysis of variance. On the basis of obtained results the following conclusions may be drawn: 1) The substitution of maize by sorghum in diet of pregnant sows at two levels, did not have significant effect on their body weight during pregnancy and lactation, respectively. 2) The increasing level of sorghum in diet of pregnant sows showed a slight tendency of pregnancy prolongation, but not statisticaly significant. 3) During lactation the experimental sows lossed on their body weight in the ratio of their net-live weight increase in pregnancy, but the differences in losses among treatment groups were not statisticaly significant. 4) The analysis of variance showed a big similarity between the performance of the treatment groups in terms of litter size, litter weight, milk production, mortality of piglets, but not in average birth-weight of piglets. Average birt-weight of piglets of group two was significantly lower than in group one and three (P < 0.01). 5) After all, we can conclude that both level of sorghum in diet of pregnant sows (20% and 40%, respectively) have had not any negative effect in biological sence with remark that sorghum type of diet was more economical than maize type one.
Ključne riječi
Hrčak ID:
165375
URI
Datum izdavanja:
30.7.1975.
Posjeta: 778 *