摘要
本试验就乌骨鸡育成期适宜蛋白质水平与产蛋期产蛋性能进行了研究。结果表明：乌骨鸡育成期蛋白质水平较低组（４～６周龄饲粮蛋白质水平为１９％，７～１４周龄蛋白质水平为１７％，１５～２５周龄蛋白质水平为１３％）与育成期蛋白质水平较高组（４～６周龄饲粮蛋白质水平为２１％，７～１４周龄蛋白质水平为１９％，１５～２５周龄蛋白质水平为１５％）的体重、日增重、饲粮效率差异不大。从产蛋率看：２７～３４周龄、４１～４８周龄也表现出育成期低蛋白组高于育成期高蛋白组。在２７～３４周龄试鸡中，除３１～３２周龄差异不显著外，其余周龄的差异都显著（Ｐ＜０．０５）。４１～４８周龄低蛋白组高于高蛋白组，但差异不显著（Ｐ＞０．０５），两种周龄期料蛋比试验结果都是低蛋白组低。通过试验得到本试验乌骨鸡育成期的３个不同时期对蛋白质适宜需要参数：４～６周龄饲粮适宜蛋白质水平为１ｇ％（ＭＥ：１２．３０ＭＪ／ｋｇ），７～１４周龄蛋白质水平为１７％（ＭＥ：１１．９５ＭＪ／ｋｇ）、１５～２５周龄蛋白质水平为１３％（ＭＥ：１１．５９ＭＪ／ｋｇ）。
The aim of this experiment of Black - bone chicken is to study the optimal dietary protein level in finishing period and in laying period. The results showed that there was little difference between the group with lower dietary protein level(the protein content in 4-6 weeks age was 19%,7～14 weeks age was 17% and 15～25 weeks age was 13K) and the group with higher protein level(the protein content in 4～6 weeks age was 21%. in 7～14 weeks age was 19% and in 15～25 weeks age was 15%) in body weight, daily gain and. feed conversion of Black - bone chicken in finishing period. It was found that the laying rate in the group with lower dietary protein level in 27～34 weeks age and in 41～48 weeks age were higher than the group with higher deitary protein level in finishing period . Except in 31～32 weeks age , there was significant difference among groups in 27～34 weeks age (P < 0. 05) , and the laying rate of Black - bone chicken with lower deitary protein level in 41～48 weeks age was higher than those with higher protein level, but the difference was not significant( P > 0. 05) . The feed/egg conversion rate in group with lower deitary protein level was lower. Through this experiments, it was found that there was need of optimal deitary protein level in finishing period of Black - bone chicken and the optimal protein level in the diets in 4～6 weeks age was 19%(ME : 12. 30 MJ / kg) , in 7～14 weeks age was 17% (ME: 11. 95MJ / kg)and in 15～25 weeks age was 13%(ME: 11.59MJ / kg).
出处
《动物营养学报》
CAS
CSCD
1998年第3期53-58,共6页
CHINESE JOURNAL OF ANIMAL NUTRITION
关键词
乌骨鸡
蛋白质水平
育成期
产蛋率
产蛋期
Black - bone chicken , Protein level , Finishing period , Laying rate, Laying period
