Effect of dietary supplementation of probiotic (Bacillus subtilis) on productive performance of Leaung Hang Khaow native chickens

บทคัดย่อ

The objective of this study was to study the effect of dietary supplementation of probiotic (Bacillus subtilis) DL-Pro 1 on productive performance of Leaung Hang Khaow Krabin Buri native chickens. Mixed sex of sixty chickens at 8 weeks old were used in this study.  The experimental design was completely randomized design (CRD) by the experiment was divided into 3 treatments and each treatment consisted of 2 replications. Treatment 1 was control (no supplementation with probiotic (Bacillus subtilis) DL-Pro 1. Treatment 2 was supplemented with probiotic DL-Pro 1 at 0.2 percent, and Treatment 3 was supplemented with probiotic DL-Pro 1 at 0.4 percent. The study was conducted 56 days. The data of weight gain, daily feed intake, growth rate, feed conversion ratio, and survival rate were collected through the experiment. Data was analyzed using Analysis of variance (ANOVA) and compared the average ​​by Duncan’s new multiple range test (DMRT). The results showed that dietary supplementation of probiotic (Bacillus subtilis) DL-Pro 1 had no significantly different in weight gain, daily feed intake, growth rate, feed conversion ratio, and survival rate (P > 0.05). In conclusion, dietary supplementation of probiotic (Bacillus subtilis) DL-Pro 1 had no effect on productive performance of Leaung Hang Khaow native chickens.