Effect of Feed Additives Containing K.daigremontiana and M.sativa L.on Egg Traits and Performance of Laying Hens

摘要

The aim of the study was to evaluate the effect of feed additives containing Kalanchoe daigremontiana and Medicago sativa L.on the performance and egg traits of laying hens.A total of 150 laying hens (Hy-Line Brown),25 week of age,was divided into 6 groups (5 replicates),and a feeding experiment was conducted for 5 weeks.The basal diet,was supplemented with the pulp of Kalanclzoe daigremontiana leaves or the phyto-mineral feed preparation (vermiculite.bentonite,calcium,humodetrynite form of brown coal)containing the pulp of Kalanchoe d.leaves or containing the pulp and M.sativa L.,at the doses of 5.0％ wt.The investigated feed additives did not significantly affect feed intake (0.122-0.127 kg/hen-d)or hen-day egg production (94.29％-98.63％ ).Moreover,Haugh units (94.56-99.02),shell thickness (0.351-0.368 mm)and eggshell strength (3.55-4.00 kg)were not influenced by examined diets.However,the phyto-mineral feed preparation affected the color of the yolk and the results estimated with a La Roche color fan were confirmed with the use of Chroma meter.Thus,the results show no effect of examined feed additives on performance and the most of egg traits,but it cannot be excluded that positive effects would have been observed in long-term experiruent or under less hygienic environmental conditions.