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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 Green or a Combination of Green and Blue Monochromatic Light on Growth, Carcass Yield, the Heterophilto- Lymphocyte Ratio and Eye Morphology of Thai Indigenous Ch ผู้เขียน:ดร.นิรัตน์ กองรัตนานันท์, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractIn total, 240 one day old Thai-native chickens (Gallus domesticus) were housed in floor pens, located in a light-proof shed and exposed to one of the following lighting treatments: 1) white fluorescent light throughout the 16 wk of the experimental period (WF), 2) green light provided by a light emitting diode (LED) throughout the experimental period (GLED) and 3) green LED light for the first 3 wk then switching to blue LED light provided for the remaining 13 wk (G-BLED). All treatments were provided with a daily light:dark photoperiod of 23:1 hr over the 16 wk growing period, and there were four replicate pens of 20 straight-run chickens for each treatment. Live performance and the mortality rate were recorded during the experimental period. Feed and water were available at all times. Cumulative feed consumption, feed conversion ratios and mortality rates were similar among the treatment groups. At 6 wk of age, the body weight of the GLED birds was significantly heavier than that of the WF birds, whereas the G-BLED birds had an intermediate value compared with those of the other two treatment groups. Whole carcass and carcass yield characteristics of male chickens processed at age 16 wk were similar for all light treatments, except for relative weights, expressed as percentages of body weight and lean carcass weight, of the liver where the liver relative weights of the WF treatment group were significantly greater than those of the GLED treatment group. There were no significant differences among the treatment groups for weights of the spleen, thymus and bursa of Fabricius. Neither the hematocrit value nor eye morphology of the male birds measured at age 16 wk were influenced by the light treatments. However, the WF birds had a higher heterophil-to-lymphocyte ratio (P < 0.05) compared with the GLED and G-BLED birds. It was concluded that green or blue light has little effect on growth stimulation and the carcass yield of Thai-native chickens without any deleterious effect on eye morphology. The results suggested that the light spectra reduced aggression and activity in the birds. Nevertheless, an additional effect of light intensity may exist and should not be excluded. The LED lighting regimens could be beneficial for energy conservation, the reduction of rearing costs and the improvement of the well-being of the birds. |
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. |
หัวเรื่อง:การเจริญเติบโตและคุณภาพซากของไก่พื้นเมือง เลี้ยงภายใต้ชั่วโมงแสงธรรมชาติ และชั่วโมงแสงยาว 23 ชั่วโมงต่อวัน ผู้เขียน:Ratana Chotesangasa, Nirat Gongrattananun สื่อสิ่งพิมพ์:pdf AbstractThe effect of long photoperiod on growth, carcass yield, and carcass composition in native chickens were examined. Two lighting programmes of natural day length (NDL) and photoperiod of 23 hours/day (23L:1D) were set. It was found that the 23L:1D group tended to have better growth than the NDL group. Average body weights of the 23L:1D and NDL groups at 16 weeks of age were 1,508 g and 1,451 g and at 20 weeks of age were 1,803 g and 1,746 g, respectively, while feed conversion ratios of the two groups were not different (P>0.05). Both groups had low mortality rate of only 2-3% with no sign of leg disorder, ascites, and breast blister. In term of carcass yield, males responded to the long photoperiod more than females. As carcass weights of the females of both groups were not different (P>0.05), carcass weights of the male of 23L:1D group were higher than (P<0.05) those of the NDL group. Higher yields were found of those killed at 16 weeks of age in chilled carcass weight (1,606 g, 1,479 g, P<0.05), breast weight (317.9 g, 269.3 g, P<0.05), and drumstick weight (232.5 g, 208.0 g, P<0.05), and of those killed at 20 weeks of age in breast weight (378.4 g, 344.9 g, P<0.05). When compared between age, killing at the older age yielded more meat in term of actual carcass weight (P<0.05) but not in term of percentage of chilled carcass weight (P>0.05) except for the drumstick weight in the male (P<0.05). Chemical compositions of the carcass did not change due to photoperiods (P>0.05) but changed considerably due to ages at killing. In general, meat protein was increased from about 61.0% to 65.2% (P<0.05), meat ash was decreased from about 3.9% to 3.4% (P<0.05), and meat fat showed no noticable change (P>0.05) when compared between killing at 16 and 20 weeks of age. |
 ที่มา:การประชุมทางวิชาการของมหาวิทยาลัยเกษตรศาสตร์ ครั้งที่ 48: สาขาสัตว์. กรุงเทพฯ, 2553, หน้า 158-166หัวเรื่อง:ผลของระดับโปรตีนและพลังงานในอาหารต่อการเจริญเติบโตและปริมาณซากในไก่เบตง (สายเคยู) |