Faculty of Veterinary Medicine University of Zagreb
Abstract
Feeding with barley and alfalfa in hens during induced moulting diets and their effects on the bone characteristics and the reproductive tracts were investigated. For this purpose, 88 week old 36 Lohmann Brown laying hens were divided into three homogenous groups and each group was fed: i) normal commercial feed ii) barley and iii) alfalfa over the ten day moulting period. The recorded body mass loss of each group over this period was around 18-19%. Although a relative increase in body mass was observed for all groups at the end of the second production cycle, only the value obtained for the normal commercial feeding group had statistical significance (P<0.001). Moulting diets had no influence on the length and mass of bones. Meanwhile, cortical thickness of the femur and tibiotarsus was higher in the alfalfa fed group compared to the other groups (P<0.05). Furthermore, the oviduct mass of the barley group was significantly heavier compared to the others (P<0.05).Istraženi su učinci hranidbe nesilica ječmom i lucernom na svojstva kostiju i spolnih organa u tijeku mitarenja izazvanoga hranom. U tu je svrhu 36 nesilica, Lohmann Brown, u dobi od 88 tjedana, bilo podijeljeno u tri skupine od kojih je jedna skupina dobivala normalnu komercijalnu hranu, druga skupina ječam, a treća skupina lucernu tijekom deset dana u razdoblju mitarenja. Gubitak tjelesne mase u svakoj skupini u tom je razdoblju iznosio od 18 do 19%. Iako je relativno povećanje tjelesne mase zabilježeno u svim skupinama na kraju drugoga ciklusa proizvodnje, statistički značajne vrijednosti (P<0,001) dobivene su samo za skupinu hranjenu normalnom komercijalnom smjesom. Hrana za mitarenje nije imala utjecaj na dužinu i masu kostiju. Međutim, kortikalno zadebljanje femura i tibiotarzusa bilo je veće u skupini koja je dobivala lucernu nego u ostalim skupinama (P<0,05). Nadalje, masa jajovoda skupine hranjene ječmom bila je značajno veća u usporedbi s drugim dvjema skupinama (P<0,05)