CAJ | 학술논문

本试验研究了不同环境温度（10～30℃）持续14 d对肉鸡生产性能、糖代谢和禽类解偶联蛋白（ avUCP） mRNA表达的影响。试验选取21日龄爱拔益加（ AA）肉鸡288只，随机分到6个人工环境控制舱中，每个舱饲养6笼，每笼8只鸡作为1个重复。预试期7 d，温度22℃，相对湿度60％。28日龄时将各环境控制舱温度分别逐渐（1 h内）调到10、14、18、22、26和30℃，相对湿度60％，温湿度均保持恒定直至试验结束。正试期14 d。结果表明：1）试验期内，30℃组的体重（ BW）显著低于14～26℃组（ P＜0．05）；22～30℃组平均日采食量（ ADFI）随温度升高而显著下降（ P＜0．05）；10～30℃组平均日增重（ ADG）随温度升高出现先升高后下降的趋势，在22℃时最高；料重比（ F/G）随温度升高呈现先下降后升高的趋势，22℃时最低；平均日饮水量（ ADWC）在10℃组最低。2）试验第14天，26℃组血糖水平显著低于18℃组（ P＜0．05）；肝糖原水平在各组之间差异不显著（ P＞0．05）；22℃组肌糖原水平显著低于10、26和30℃组（ P＜0．05）。3）试验第14天，18、22℃组avUCP mRNA相对表达量显著高于其他组（ P＜0．05）。结果提示：在本试验条件下，从生产性能和能量利用效率考虑，28～42日龄AA肉鸡的适宜养殖温度为22～26℃。
본시험연구료불동배경온도（10～30℃）지속14 d대육계생산성능、당대사화금류해우련단백（ avUCP） mRNA표체적영향。시험선취21일령애발익가（ AA）육계288지，수궤분도6개인공배경공제창중，매개창사양6롱，매롱8지계작위1개중복。예시기7 d，온도22℃，상대습도60％。28일령시장각배경공제창온도분별축점（1 h내）조도10、14、18、22、26화30℃，상대습도60％，온습도균보지항정직지시험결속。정시기14 d。결과표명：1）시험기내，30℃조적체중（ BW）현저저우14～26℃조（ P＜0．05）；22～30℃조평균일채식량（ ADFI）수온도승고이현저하강（ P＜0．05）；10～30℃조평균일증중（ ADG）수온도승고출현선승고후하강적추세，재22℃시최고；료중비（ F/G）수온도승고정현선하강후승고적추세，22℃시최저；평균일음수량（ ADWC）재10℃조최저。2）시험제14천，26℃조혈당수평현저저우18℃조（ P＜0．05）；간당원수평재각조지간차이불현저（ P＞0．05）；22℃조기당원수평현저저우10、26화30℃조（ P＜0．05）。3）시험제14천，18、22℃조avUCP mRNA상대표체량현저고우기타조（ P＜0．05）。결과제시：재본시험조건하，종생산성능화능량이용효솔고필，28～42일령AA육계적괄의양식온도위22～26℃。
This study was conducted to investigate the effects of different environmental temperatures ( ranged from 10 to 30 ℃) on performance, glucose metabolism and expression of avian uncoupling protein ( avUCP) mRNA of broilers. Two hundred and eighty eight 21-day-old Arbor Acres ( AA) broilers were assigned to six environmental chambers, each chamber contained six cages with eight birds per cage, and each cage as a repli-cate. The pre-test period lasted for 7 days and broilers were kept at 22℃ temperature and 60% relative humidi-ty. When broilers were 28-day-old, the temperatures of each environmental chamber were gradually ( within 1 h) regulated to 10, 14, 18, 22, 26 and 30℃, respectively, while maintaining the relative humidity at 60%and both kept constant until the end of the experiment. The trial period lasted for 14 days. The results showed as follows:1) throughout the trial period, the body weight ( BW) of broilers in 30 ℃ group was significantly lower than 14 to 26 ℃ groups ( P<0.05);average daily feed intake ( ADFI) of broilers in 22 to 30 ℃ groups were significantly decreased with the increase of environmental temperature ( P<0. 05 ); average daily gain ( ADG) of broilers in 10 to 30℃ groups were increased firstly and then decreased with the increase of environ-mental temperature ( P<0.05) , and 22 ℃ group was the highest; with the increase of environmental tempera-ture, the ratio of feed to gain ( F/G) decreased firstly and then increased, and the lowest point was reached at 22 ℃; the average daily water intake ( ADWC) was minimum in 10 ℃ group. 2) after prolonged temperature treatment for 14 days, glycemia level was significantly higher in 18℃ group than 26℃ group ( P<0.05);he-patic glycogen level was not significantly affected by environmental temperature ( P>0.05); muscle glycogen level was significantly lower in 22℃ group than 10, 26 and 30℃ groups ( P<0.05) . 3) After prolonged tem-perature treatment for 14 days, relative expression level of avUCP mRNA in 18 and 22 ℃ groups were signifi-cantly higher than that in the other groups ( P<0.05) . In conclusion, under the feeding conditions of this stud-y, and considering the performance and efficiency of energy utilization, the optimum environmental tempera-ture for AA broilers aged 28 to 42 days is in the range of 22 to 26 ℃.