This experiment was conducted determine the effect of dates molasses, ascorbic acid and feeding method on growth performance and carcass characteristics in broiler chickens. A total of 480 one day–old broilers Ross 308 were randomly allotted to 8 experimental groups in a complete randomized design. Basic treatments were divided initially at time of hatching, a- early feeding group which had a free access to water and diet from direct time of post hatching until 6 weeks, this group contained 240 chicks which distributed into 4 subgroups with 4 replicates/subgroups. The 1st subgroup was fed basal diet (control), the 2nd subgroup was fed basal diet plus 1000 ml of dates molasses/l of drinking water. The 3rd subgroup was fed basal diet plus 50 g of L-ascorbic acid/l of drinking water. The 4th subgroup was fed basal diet plus 1000 ml and 50 g of dates molasses and L-ascorbic acid, respectively / l of drinking water, b- late feeding group which had free access to water and diet after 12 hours from their reaching to farm until 6 weeks, this group was also contained 240 chicks which distributed into 4 subgroups and 4 replicates/subgroup with the same feed additives mentioned earlier.All the chickens were reared in the same environmental and management conditions. Growth performance (body weight, weight gain, feed intake, water consumption and feed conversion ratio) were determined on 3 and 6 weeks. Carcass traits (dressing percentage, breast, Thigh and femoral part, abdominal fat), factor of productive efficiency and mortality were assessed on 6 weeks. Growth performance was significantly (P<0.05) improved in the dates molasses and ascorbic acid in both early and late feeding treated broilers compared to the not supplemented control. Dates molasses in water increased the relative weight of dressing percentage, breast and abdominal fat as well as ascorbic acid increased the relative weight of thigh and femoral part. These data suggest that the dates molasses and ascorbic acid may improve growth performance in broiler chickens.

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.