Cobb500肉鸡生产性能（2015年修订）

     1、肉鸡生产性能从世界范围来看，Cobb500肉鸡品种每年都有40-45g的体重进展和饲料转化率每年有-0.02～-0.025的提高。2015年，美国科宝公司发布了如下Cobb500肉鸡生产性能指标：日龄公鸡母鸡公母混养天体重g每日增重g累积饲料转化率累积饲料消耗g体重(g)每日增重（g)累积饲料转化率累积饲料消耗g体重(g)每日增重g累积饲料转化率累积饲料消耗g0420420420156140.2321356140.2321356140.23213272160.4173072160.4173072160.41730389170.5735189170.5735189170.573514109200.67974109200.67974109200.679745131220.771101130210.776101131220.7731016157260.841132156260.841132157260.8411327186290.898167184280.908167185280.9021678217320.949206214290.953204215300.9582069250331250244301.016248247321.01225010286361.046299280361.053295283361.05329811324381.089353318381.098349321381.09735212368431.121412360431.127406364431.12641013416481.144476408481.15469412481.1547414470541.162546460531.166537465531.16554215528581.18623520601.173610524591.17761716590621.197706582621.184689586621.19169817656661.213796646641.197773651651.20678518727711.228893711651.212862719681.22187819803761.242997777661.228954790711.23597620884811.2551109844671.2461052865751.25108121971871.2651228914701.2631155943781.2641192221058871.2781352986721.28412661020801.2841309231145871.29414821060741.30413821099811.3031432241233881.31216181136761.32615061182821.3211562251321881.33217601214781.34416321269831.3371696261409881.35419081294801.36517661354841.3561837271497881.37720621378841.38519081446851.3731985281585881.40222221463851.40320521524861.4022137291677921.42323871549861.42222031613891.4232295301773961.44325581636871.44123581705921.44224583118731001.4627351724881.46125191799941.4626273219781051.47629191813891.47926821895961.47828013320851071.49231111903901.49628471993981.49629813421921071.5133111993901.51230142092991.51231633522991071.53135202083901.52831832191991.5333523624061071.55137322172891.54633582289981.54935453725131071.57139472259871.56635372386971.56837423826201071.5941652344851.58737212482961.58939433927261061.60943862428841.6139102577951.6141484028321061.62846112510821.63541032671941.63143574129381061.64748402591811.6643002764931.65345704230441061.66750732671801.68444992857931.67547864331501061.68653102751801.70947022950931.69750064432561061.70555512831801.73349053043931.71852284533621061.72457962910791.75651103136931.73954534634681061.74360462989791.77853143229931.75956804735741061.76363013068791.855213322931.77959114836801061.78465663147791.8257293414921.861444937861061.80568363226791.84159383506921.81963795038911051.82571013301751.86261473596901.8466165139941031.84473663376751.88463603685891.8668555240951011.86376313451751.90565753773881.887095534194991.88378963524731.92867943859861.9017337544291971.90281613597731.9570153944851.9227580554386951.92184263670731.97372404028841.9437825564481951.9486913741711.99574654111831.9638070574573921.95889563812712.01776904192811.9848315584662891.97892213883712.03879154272802.0048560594748861.99894863953702.05981404350782.0248805604831832.01897514023702.07983654427772.0449050614912812.039100164093702.09985904502752.0659295624990782.06102814162692.11888154576742.0859540635068782.081105464230682.13790404649732.10597852、肉鸡屠宰性能在不同体重情况下，Cobb500肉鸡的屠宰性能（预冷前）如下表所示：（1）母鸡屠宰性能（2015年美国科宝公司发布）体重g胴体%去骨胸肉%大腿%小腿%翅%160071.8921.8314.488.817.53180072.3222.3614.438.837.51200072.7522.8814.398.857.49220073.1823.4014.348.877.47240073.6123.9214.308.887.45260074.0424.4414.258.907.43280074.4724.9614.218.927.41300074.9025.4814.168.947.39（2）公鸡屠宰性能（2015年美国科宝公司发布）体重g胴体%去骨胸肉%大腿%小腿%翅%160071.9320.8414.469.157.48180072.2821.1314.499.217.50200072.6321.4114.539.287.51220072.9821.7014.569.357.53240073.3321.9914.609.417.55260073.6822.2814.639.487.57280074.0322.5714.679.547.59300074.3822.8514.709.617.61320074.7323.1414.749.687.63340075.0823.4314.779.747.65360075.4323.7114.819.817.67380075.7824.0014.849.887.68400076.1324.2914.889.947.70420076.4824.5814.9110.017.72440076.8324.8614.9510.077.74460077.1825.1514.9810.147.76480077.5325.4415.0210.207.78 （3）公母混养屠宰性能（2015年美国科宝公司发布）体重g胴体%去骨胸肉%大腿%小腿%翅%160071.9121.2514.499.007.51180072.3021.6514.489.047.51200072.6922.0514.489.097.51220073.0822.4514.489.137.52240073.4722.8514.489.177.52260073.8623.2514.479.227.53280074.2523.6514.479.267.53300074.6424.0514.479.307.53320075.0324.4514.479.357.54340075.4224.8514.469.397.54360075.8125.2514.469.437.55380076.2025.6514.469.477.55400076.5926.0414.469.527.55