a determination bioavailability of herbal methionine based upon growth performance and immunocompetence in broiler chickens

نویسندگان

شیلا هادی نیا

علوم دامی پردیس کشاورزی و منابع طبیعی دانشگاه تهران محمود شیوازاد

پردیس کشاورزی و منابع طبیعی دانشگاه تهران حسین مروج

هیات علمی

چکیده

a total of 160 day-old male broiler chickens (ross 308) were divided in a completely randomized design experiment, and assigned to 8 treatments and 4 replicates in their experimental units (cages). treatments included: t1: basal diet with no additional methionine, t2: basal diet plus 0.06, t3: basal diet plus 0.11, t4: basal diet plus 0.17 % of dl-methionine, t5: basal diet plus 0.06, t6: basal diet plus 0.11, t7: basal diet plus 0.17, t8: basal diet plus 0.22 % of herbal methionine. to investigate the immunocompetence of birds at 28 and 42 days of age, two tests were conducted: responding to antibody titer against antigen of sheep red blood cell (srbc) and responding to dilution 1-choloro 2-3- dinitrobenzene (dncb). multiexponential and multilinear regressions were employed to determine bioavailability of herbal methionine (h-met)® relative to dl-met on growth performance and immunocompetence of broilers. body weight gain and feed intake of the broilers (fed either h-met or dl met) improved in the experiment, regardless of met sources, in comparison with broilers fed basal diet. immunocompetence results of broilers were not significant at 28 day of age (p

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منابع مشابه

Bioavailability comparison between herbal methionine and DL-methionine on growth performance and immunocompetence basis in broiler chickens

BACKGROUND:Herbal methionine can be compared relative toDl-methionine with evaluation of bioavailability of this source ofmethionine. OBJECTIVES: An experiment was carried out todetermine the relative bioefficacy of herbal methionine (H-Met)®relative to DL-methionine (DL-Met) on performance criteria andimmunocompetence of Met sources in male broilers. Atotal of 160male broilers were fed a Met-d...

متن کامل

bioavailability comparison between herbal methionine and dl-methionine on growth performance and immunocompetence basis in broiler chickens

background:herbal methionine can be compared relative todl-methionine with evaluation of bioavailability of this source ofmethionine. objectives: an experiment was carried out todetermine the relative bioefficacy of herbal methionine (h-met)®relative to dl-methionine (dl-met) on performance criteria andimmunocompetence of met sources in male broilers. atotal of 160male broilers were fed a met-d...

متن کامل

Bio-efficacy comparison of herbal-methionine and DL-methionine based on performance and blood parameters of broiler chickens

This study was conducted to compare the bio-efficacy of herbal methionine (H-Met) relative to DL-methionine (DL-Met) on 160 “Ross 308” broiler chickens. DL-Met and H-Met were added to the basal diet in eight experimental treatments with three and four concentrations respectively in starter, grower and finisher period. Blood parameters which were measured at 24 and 42 days of age consisted of: s...

متن کامل

Relative effectiveness of herbal methionine compared to DLmethionine on growth, performance and carcass responses basis in broiler chickens

BACKGROUND: The degree to which the amount of aningested nutrient is absorbed and available to the body is calledbioavailability. OBJECTIVES: Relative effectiveness of herbalmethionine (H-Met®) compared to DL-methionine (DL-Met)was investigated in this experiment. METHODS: Exponentialregression analysis was used to determine bioefficacy of H-Met®based on body weight gain, feed intake and feed c...

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a comparison of the effect of different levels of herbal methionine and dl-methionine on growth performance and immunocompetence of broiler chickens

a study was carried out to examine the effect of different levels of herbal methionine and dl-methionine on the growth performance and immunocompetence of broiler chickens fed on a corn-soybean meal diet. a total of 225 old male broiler chickens (ross 308) were used as experimental samples in a completely randomized design. they were randomly assigned to 9 treatments each of 5 replicates in eve...

متن کامل

Bio-efficacy comparison of herbal-methionine and DL-methionine based on performance and blood parameters of broiler chickens

This study was conducted to compare the bio-efficacy of herbal methionine (H-Met) relative to DL-methionine (DL-Met) on 160 "Ross 308" broiler chickens. DL-Met and H-Met were added to the basal diet in eight experimental treatments with three and four concentrations respectively in starter, grower and finisher period. Blood parameters which were measured at 24 and 42 days of age consisted of: s...

متن کامل

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عنوان ژورنال:
علوم دامی ایران

جلد ۴۴، شماره ۳، صفحات ۲۹۳-۳۰۴

کلمات کلیدی
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