日粮磷水平对22~42日龄肉仔鸡胴体性能及肌肉品质的影响

为研究日粮磷水平对22~42日龄肉仔鸡胴体性能和肉品质的影响,选用500只1日龄爱拔益加肉鸡公雏,于1~21日龄统一饲喂相同的玉米—豆粕型配合日粮(含非植酸磷实测值为0.39%),于22日龄从中选取360只鸡,按体重相近原则随机分成10个处理组,每个处理组6个重复笼,每个重复笼6只鸡,分别饲喂不添加无机磷的玉米—豆粕型日粮(对照组,含非植酸磷0.09%)及在基础日粮中分别添加0.05%、0.10%、0.15%、0.20%、0.25%、0.30%、0.35%、0.40%和0.45%无机磷(饲料级CaHPO₄),饲养21 d。结果表明,日粮添加适宜水平的无机磷可显著提高42日龄肉仔鸡屠宰率和全净膛率(P<0.1),但日粮磷水平对42日龄肉仔鸡肉品质各指标及其他胴体性能指标均无显著影响(P>0.1)。

Effects of Dietary Phosphorus Level on Carcass Traits and Meat Quality of Broilers from 22 to 42 Days of Age

An experiment was conducted to investigate the effects of supplemental phosphorus (P) level on carcass traits and meat quality of broilers from 22 to 42 days of age. A total of 500 day-old Arbor Acres male broilers were fed the same corn-soybean meal complete diet containing 0.39% P for 21 days posthatching. On 22 days of age,360 birds were selected according to body weight and randomly divided into 10 treatment groups with 6 chicks per cage of 6 replicate cages for each treatment in a completely randomized design. Birds were fed a P-unsupplemented corn-soybean meal basal diet containing 0.09% P and the basal diets supplemented with 0,0.05%,0.10%,0.15%,0.20%,0.25%,0.30%,0.35%,0.40% and 0.45% P as CaHPO₄ (feed grade) for 21 days,respectively. The results showed that dietary proper P levels improved dressing percentage (P<0.1) and whole net carcass percentage (P<0.1) of broilers on 42 day of age. However,there were no significant differences in meat quality and other carcass traits among treatments(P>0.1).