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 ผลงานตีพิมพ์ในวารสารวิชาการEffect of Protein level and Dietary Energy on Production, Intestinal Morphology and Carcass Yield of Meat Duck during Starter Phase of 14 daysผู้แต่ง: เอกพล สีเทียวไทย, สุรพัชญ สกุลไทย, เจษฎา ศักดิ์ดี,  Dr.Chaiyapoom Bunchasak, Professor , Mr.Chanwit Kaewtapee, Associate Professor , Dr.Theerawit Poeikhampha, Associate Professor , วารสาร:  
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ผลงานตีพิมพ์ในวารสารวิชาการEffects of Adding Vitamins and Organic Acids into the Drinking Water on Growth Performance, Carcass Yield and Meat Quality of Broilers Raised Under Tropical Conditionผู้แต่ง:Dr.Theerawit Poeikhampha, Associate Professor, Dr.Chaiyapoom Bunchasak, Professor, Dr.Choawit Rakangthong, Assistant Professor , Mr.Chanwit Kaewtapee, Associate Professor, Wararat Arparjirasakul, Pornpun Phoprasit, วารสาร: |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Dietary Energy and Methionine Sources on Productive Performance and Carcass Yield in Broiler Chickens) ผู้เขียน:ดร.เชาว์วิทย์ ระฆังทอง, ผู้ช่วยศาสตราจารย์, ดร.ชัยภูมิ บัญชาศักดิ์, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractAn experiment was conducted to determine the effects of two dietary energy sources (corn and cassava) and three types of dietary methionine (Met) supplementation (without methionine supplementation, liquid DL-methionine hydroxy analog-free acid (LMA) supplementation and dry DLmethionine (DLM) supplementation) on the growth performance and carcass yield of broiler chicks during 0-6 weeks of age. The experiment was a completely randomized design in a 2 ? 3 fractional factorial. Nine hundred commercial male broiler chicks (Ross strain) were divided into six groups, and each group consisted of six replicates of 25 chicks each. The chicks were kept in floor pens, and water and feed were supplied ad libitum throughout the experimental period. The six experimental diets were: 1) corn-soybean diet deficient in methionine, 2) corn-soybean diet supplemented with DLM, 3) cornsoybean diet supplemented with LMA, 4) cassava-soybean diet deficient in methionine, 5) cassavasoybean diet supplemented with DLM and 6) cassava-soybean diet supplemented with LMA. The experiment assumed that 100 units of liquid LMA could be replaced by 88 units of DLM. Weight gains, feed conversion ratio (FCR) and average daily gain (ADG) in chicks fed the diets supplemented with LMA or DLM were significantly greater than those in chicks fed the methionine-deficient diets (P<0.05). The weights of the eviscerated carcass, pectoralis major, pectoralis minor and wings were increased by DLM and LMA supplementation (P<0.05). Dietary energy sources analysis indicated that the meat yield of chicks fed the cassava-soybean diet was lower than for chicks fed the corn-soybean diet, while the abdominal fat level was higher. The results indicated that chicks fed the cassava-soybean base diet showed lower productive performance than chicks fed the corn-soybean base diet. The effect of methionine source (DLM and LMA) on the growth performance and carcass yield of chicks was not significantly different. In conclusion, adding methionine could prevent the negative impact of amino acid imbalance and improve the energy utilization of chicks fed on a diet based on cassava-soybean. |
หัวเรื่อง:การศึกษาการเจริญเติบโตและผลผลิตซากของไก่เบตง เปรียบเทียบกับไก่พื้นเมืองและไก่ลูกผสมเบตง x พื้นเมือง ผู้เขียน:Nirat Gongruttanannu, Ratana Chotesangasa สื่อสิ่งพิมพ์:pdf AbstractThis experiment was conducted to determine the growth rate and carcass yield of Betong (B) compared with those of crossbred Native (male) x Betong (female) (NB), crossbred Betong (male) x Native (female) (BN), and Native chickens (N). Day-old straight chickens were placed on battery cages and were slaughtered at 16 weeks of age. Body weight (BW) of B was consistently greater than (P<0.05) the other 3 breeds for the duration of the study, from hatching (32.80) to 16 weeks (2.486 kg) while the average cumulative feed conversion ratios for these periods were 1.80 and 3.79, respectively. BW of NB and BN were similar through the study even though at hatching BN had BW lower than NB (28.30 versus 32.40 g, respectively). Weights of B of whole carcass and carcass parts B were considerably greater than those of (P<0.05) the others, with this difference pronounced in both sexes. Yield (expressed on a percentage of chilled carcass weight basis) of pectoralis major of B in male (14.67%) was greater than (P<0.05) those of the other breed, and the same difference was shown in female (17.10%). However, there was no difference in yield of pectoralis minor among the 4 breeds of both sexes. Thigh yield of B, NB and BN in male were 18.15, 18.74 and 18.40% respectively, greater than (P<0.05) that of N (17.17%). Both yield of drumsticks and wings of B in male were fewer than the others whereas there was no difference in female. Yield of abdominal leaf fat was affected by sex, the greater yield was in female, whereas there was no difference among the 4 breeds of chickens. |
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