effect of organic acids mixture and two methionine sources on performance, carcass characteristics and gastrointestinal tract in broiler

a study was carried out to investigate the effects of organic acid mixture as well as two methionine supplements on performance, carcass characteristics and weight of gastrointestinal tract in broiler chickens. six hundred unsexed day-old ross 308 broiler chicks were utilized in a factorial arrangement of treatments (3×2) based on completely randomized design (crd) of 4 replicates of 25 chicks each. a chicks were placed in floor pens (1.2 ×2 m2). experimental diets consisted of three levels of organic acid mixture consisting of formic, lactic, malic, citric, tartaric and ortho-phosphoric acid (under the trademark orgacid) (0, 0.5, and 1%) and two sources of methionine supplement (dl-methionine and liquid methionine hydroxy analogue (alimet). the experiment was carried out in two periods. levels of 0.5 and 1% of organic acids mixtures increased body weight and improved feed conversion ratio (p