The Effectiveness of Using a Combination of Saponin and Vaccine Given In Ovo on Hatchability and Early Growth Performance of Local Chickens

A study has been carried out to determine the correct dosage for using a combination of saponin and vaccine in an in ovo formula on hatchability and early growth performance. There were four levels of saponin use (0.0; 1.5; 3.0; 4.5 microgram) arranged using a factorial design with two factors, namely saponin level as the first factor, while whether or not vaccine was used as the second factor, so there were eight formula combinations. Each formula combination was dissolved in phosphate buffered saline, then injected into the amnion of fertile eggs of Sentul chickens during incubation for 18 days (0.5 ml/egg) using an automatic injector machine with a 20G needle. The results showed that increasing saponin levels combined with vaccines as an ingredient in the in ovo feeding formula results in decreased hatchability. A very significant decrease occurred at the 4.5 µg level. The average hatchability of vaccine treatment was significantly better than those treated without vaccine. There is no interaction effect of the two materials on hatchability. However, the interaction effect was seen in all parameters of early growth performance of Sentul chicken during the 4 weeks of observation. The vaccine treatment will be more effective if it is used separately or not mixed with saponin (0.0 µg), while the use of saponin without vaccine will produce the best weight gain and feed efficiency when used at the highest dose level (4.5 µg).