普安盘江乌鸡体尺、屠宰性能测定及相关性分析

Measurement and Correlation Analysis of Body Size and Slaughter Traits of Pu'an Panjiang Black Chicken

该试验选择同批次孵化出壳的普安盘江乌鸡雏鸡200只(公母各半),饲养至150日龄时随机选择60只(公母各半)进行体尺及屠宰性状的测定和分析。结果表明:公鸡的宰前活重、屠宰率、全净膛率分别为1903.75 g、86.32%、75.07%,母鸡的宰前活重、屠宰率、全净膛率分别为1556.04 g、88.55%、71.31%。公鸡的体尺性状及宰前活重、屠体重、半净膛重、全净膛重、全净膛率、腿肌重、腿肌率均极显著高于母鸡(P<0.01)。母鸡的腹脂重、屠宰率和腹脂率极显著高于公鸡(P<0.01),胸肌率显著高于公鸡(P<0.05)。公鸡的体斜长、胸深、胫长分别与宰前活重、屠体重、半净膛重、全净膛重、腿肌重、胸肌重、半净膛率、全净膛率呈极显著正相关关系(P<0.01)。母鸡的体斜长、胸宽、胸深与宰前活重、半净膛重、全净膛重、腿肌重呈极显著正相关关系(P<0.01)。可见,普安盘江乌鸡的体尺、屠宰性能指标存在性别差异,体斜长、胸深和胸宽可作为屠宰性能选育的间接指标。

This study selected 200 chicks of Pu’an panjiang black chicken(male and female in half)hatched from the same batch.At the age of 150 days,60 birds(male and female in half)are randomly selected for measurement and analysis of the body size and slaughter performance.The results showed that the live weight,dressed rate,and eviscerated rate for cocks were 1903.75 g,86.32%,and 75.07%,while the traits for hens were 1556.04 g,88.55%,and 71.31%,respectively.The body size,live weight,dressed weight,half-eviscerated weight,eviscerated weight,eviscerated rate,leg muscle weight and leg muscle rate of cocks were very significantly greater than those of hens(P<0.01).The abdominal fat weight,slaughter rate and abdominal fat rate of hens were very significantly greater than those of cocks(P<0.01),the breast muscle rate was significantly greater than cocks(P<0.05).In addition,the body slope length,chest depth and shank length of cocks were extremely significantly and positively correlated with the live weight,dressed weight,half-eviscerated weight,eviscerated weight,leg muscle weight,breast muscle weight,half-eviscerated rate and eviscerated rate respectively(P<0.01).The body slope length,chest width,chest depth of hens were extremely significantly and positively correlated with the live weight,half-eviscerated weight,eviscerated weight,leg muscle weight respectively(P<0.01).It can be seen that there are gender differences in body size and slaughter performance of Pu'an panjiang black chickens,and body slope length,chest depth and chest width can be used as indirect indicators of slaughter performance breeding.