Abstract
The contribution of natural products as growth promoters as a major causative mechanism for limiting antibiotic growth promoter has been considered recently. It was found that this strategy contributed to the increase of the growth and development of poultry production , as a result, to an increase in the growth efficiency and reduction of the antibiotic as growth promoters. The aim of our study was to analyze whether the use natural growth promoters as antibiotic replacement can increase the broiler's growth. We analyzed the effect of probiotic, Spearmint leaves powder as replacement to Antibiotic in diet of broiler chicks on growth production. Total 240 female broiler chicks at one day old were housed ,designed into four experimental treatments with 3 replicated pens (20chicks per replicated pen) according to a completely randomized design. The experimental treatments were named G1: either basal feed only, G2: basal feed plus 2 % probiotic ( “Lactobacillus spp kkp 529/p® (“probiotic containing on Lactobacillus plantarum, 1.0 × 106 cfu/g”), G3: Basal feed plus 0.4 g/kg oxytetracycline, G4: basal feed plus Spearmint leaves powder 2g /kg feed for 6 weeks.
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