中国饲料
中國飼料
중국사료
CHINA FEED
2013年
17期
12-14,17
,共4页
急性热应激%肉质%肉仔鸡%抗氧化
急性熱應激%肉質%肉仔鷄%抗氧化
급성열응격%육질%육자계%항양화
acute heat stress%meat quality%broiler%antioxidant
为探讨热应激对AA肉仔鸡肉品质及抗氧化能力的影响，试验选用35日龄体重相近的健康AA肉仔鸡（公）120只，随机分成2组，一组高温组（34℃），一组为适温组（21℃），每组5个重复，每个重复12只。试验期为7 d。结果表明：高温应激组胸肌和腿肌pH值显著低于适温对照组（P ＜0.05），滴水损失显著高于适温对照组（P ＜0.05），但两试验组间剪切力无显著差异（P＞0.05）。高温应激组胸肌超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性均低于对照组，且差异显著（P＜0.05）；GSH-Px活性两试验组间无显著差异（P＞0.05）。同时与对照组比较，高温可显著降低腿肌SOD、CAT和GSH-Px活性（P＜0.05）。高温应激组胸肌和腿肌MDA水平显著高于对照组（P＜0.05）。由此可见，热应激可使AA肉鸡肉品质下降，肌肉氧化程度增加，抗氧化能力降低。
為探討熱應激對AA肉仔鷄肉品質及抗氧化能力的影響，試驗選用35日齡體重相近的健康AA肉仔鷄（公）120隻，隨機分成2組，一組高溫組（34℃），一組為適溫組（21℃），每組5箇重複，每箇重複12隻。試驗期為7 d。結果錶明：高溫應激組胸肌和腿肌pH值顯著低于適溫對照組（P ＜0.05），滴水損失顯著高于適溫對照組（P ＜0.05），但兩試驗組間剪切力無顯著差異（P＞0.05）。高溫應激組胸肌超氧化物歧化酶（SOD）和過氧化氫酶（CAT）活性均低于對照組，且差異顯著（P＜0.05）；GSH-Px活性兩試驗組間無顯著差異（P＞0.05）。同時與對照組比較，高溫可顯著降低腿肌SOD、CAT和GSH-Px活性（P＜0.05）。高溫應激組胸肌和腿肌MDA水平顯著高于對照組（P＜0.05）。由此可見，熱應激可使AA肉鷄肉品質下降，肌肉氧化程度增加，抗氧化能力降低。
위탐토열응격대AA육자계육품질급항양화능력적영향，시험선용35일령체중상근적건강AA육자계（공）120지，수궤분성2조，일조고온조（34℃），일조위괄온조（21℃），매조5개중복，매개중복12지。시험기위7 d。결과표명：고온응격조흉기화퇴기pH치현저저우괄온대조조（P ＜0.05），적수손실현저고우괄온대조조（P ＜0.05），단량시험조간전절력무현저차이（P＞0.05）。고온응격조흉기초양화물기화매（SOD）화과양화경매（CAT）활성균저우대조조，차차이현저（P＜0.05）；GSH-Px활성량시험조간무현저차이（P＞0.05）。동시여대조조비교，고온가현저강저퇴기SOD、CAT화GSH-Px활성（P＜0.05）。고온응격조흉기화퇴기MDA수평현저고우대조조（P＜0.05）。유차가견，열응격가사AA육계육품질하강，기육양화정도증가，항양화능력강저。
The study was conducted to examine the effect of heat stress on meat quality and antioxidant capacity of AA broiler.A total of 120 35-d-old male AA broiler were allocated to two groups with 5 replicates of 12 each:constant heat stress at 34℃with ad libitum feeding(34 AL),constant optimal ambient temperature at 21℃with ab libitum feeding (21 AL).The experiment period was 7 d.The results showed that:compared with the control group,the pH of breast muscle and thigh muscle in stress group in high temperature decreased significantly (P < 0.05),the drip loss increased signifi-cantly(P<0.05).However,there were significant differences of shear force of breast muscle and thigh muscle between the two groups(P > 0.05).In breast muscle,the SOD activity and CAT activity were significantly decreased(P < 0.05)by hest exposure while GSH-Px activity was not changed(P > 0.05)compared to the control group(P < 0.05).In thigh muscle,the SOD activity,CAT activity and GSH-Px activity all significantly decreased in heat stressed group compared to control group.Both in breast muscle and in thigh muscle,the concentration of MDA was significantly increased in heat stress group compared to control group (P < 0.05).The results indicated that heat stress treatment could make the meat quality of AA broiler chickens decline,muscle oxidative degree increase,and antioxidant capacity decrease.
