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This research was guided to investigate the effects of supplementation of DL-methionine (DLM) and liquid DL-methionine hydroxy analog free acid (MHA) in diets on productive performance, hematological, blood metabolites and histological parameters in broiler chickens under summer conditions in Sina. A total number of 180 one day old Hubbard broiler chicks, with initial body weight (46.9 ± 2.5 g), were divided into 6 equal treatment groups. The treatment were DL-methionine (DLM) at 0.25% level, acid liquid methionine (ALM) and methionine hydroxyl analogue Ca salt (MHA) at 0.29 and 0.30%, respectively with and without dietary L-Threonine (0.0 and 1.0 g/kg diet). Chicks were raised for 35 days in battery cages under semi – arid conditions (high ambient temperature and relative humidity) in open-side housing. The obtained results indicate: The productive performance of DLM and MHA were not significantly different. Supplementation of DLM and MHA significantly improved final body weight, body weight gain, average daily gain, and feed conversion ratio when compared to the control group (P<0.01). The use of DLM enhanced the plasma methionine concentration (P<0.01) and increased the heterophil/lymphocyte ratio (P<0.05). While MHA elevated the plasma urea and uric acid concentration levels (P<0.05).

The experiment was conducted to determine the effects of sesame meal supplementation on the production economy of broiler chickens. The study used a total of one hundred- and fifty-day-old Anak 2000 white strain unsexed broiler chicks which were randomly allocated to five dietary treatments of thirty broiler chicks per treatment and replicated three times with ten birds per replicate in a completely randomized design (CRD). Five experimental diets were formulated with toasted white sesame seeds meal (TWSSM) supplemented methionine at 0%, 4%, 8%, 12% and 16% in diets. The growth performance of the birds at starter phase were not significantly different (P?0.05) across all the treatments. At the finisher phase, the average daily feed intake (ADFI) differs significantly (P?0.001) among the treatment groups, while the average daily weight gain (ADWG) and feed conversion ratio (FCR) were similar. Feed cost (?431.49/kg gain) was higher in T5 (16%) TWSS while T2 (4%) TWSS had the lowest feed cost (?336. 54/kg gain). Thus, it was concluded that TWSSM could be a potential vegetables protein source for broiler chickens’ production and can be included in their diets at 4% as supplement for methionine without having effects on growth performance and equally reduces the cost of production.