摘要
【目的】研究日粮中不同代谢能(ME)和蛋白质(CP)水平对产蛋高峰期(30—39周龄)岭南黄羽肉种鸡生长性能、产蛋性能和孵化性能的影响。【方法】采用3(ME:11.09、11.51和11.92 MJ.kg-1)×3(CP:15.5%、16.5%和17.5%)两因子试验设计,选取1 134只健康的30周龄快大型岭南黄羽父母代肉种鸡,随机分成9组,每组6个重复,每个重复21只。试验期10周。统计各个重复的体增重、料蛋比、产蛋率、日产蛋重、平均蛋重、种蛋破损率、不合格蛋比率、受精率、18日活胚率、孵化率和健雏率。【结果】(1)11.92 MJ.kg-1ME处理组试验鸡只的体增重显著高于11.51 MJ.kg-1ME处理组(P<0.05),极显著高于11.09 MJ.kg-1ME处理组(P<0.01),其料蛋比显著低于11.51和11.09 MJ.kg-1ME处理组(P<0.05);而CP水平对试验鸡只的体增重和料蛋比无显著性影响(P>0.05);(2)产蛋性能:11.92 MJ.kg-1ME处理组产蛋率和日产蛋重最高(P<0.01);11.51和11.92 MJ.kg-1ME处理组平均蛋重显著高于11.09 MJ.kg-1ME处理组(P<0.05);11.92 MJ.kg-1ME处理组种蛋破损率也高于11.51和11.09 MJ.kg-1ME处理组(P<0.05);不合格蛋比率以11.09 MJ.kg-1ME处理组最高(P<0.05),ME和CP水平对试验鸡只不合格蛋比率具有显著的互作效应(P<0.05);与CP 15.5%处理组相比,日粮CP水平为16.5%和17.5%时,显著提高了平均蛋重,并显著降低了种蛋破损率(P<0.05);(3)孵化指标:日粮ME为11.92 MJ.kg-1或CP为16.5%时,雏鸡初生重显著高于其它处理组(P<0.05),但各处理组的受精率、18日活胚率、孵化率和健雏率均无显著性差异(P>0.05)。【结论】30—39周龄岭南黄羽肉种鸡获得最佳繁殖性能的日粮适宜ME和CP水平分别为11.92MJ.kg-1和16.5%,每日ME和CP需要量分别为1.55 MJ和21.45 g。
[Objective] This experiment was conducted to investigate different dietary levels of metabolizable energy and crude protein on performance of Lingnan Yellow-Feathered Broiler Breeders. [ Method ] A total of 1 134 30-week-old Lingnan Yellow-Feathered Broiler Breeders were randomly assigned into 3 ×3 factorial dietary treatments with 3 dietary metabolizable energy （ME） levels at 11.09, 11.51, and 11.92 MJ·kg^-1 and 3 crude protein （CP） levels at 15.5%, 16.5%, and 17.5%. Each dietary treatment had 6 replicates with 21 birds per replicate. Experimental birds were fed 130 g of diet per bird every day. Growth performance, laying performance, and egg incubation indicators were determined. The trial lasted for 10 weeks. [Result] Broiler breeders fed 11.92 MJ·kg^-1 ME diet had significantly greater weight gain and lower FCR （feed intake/egg mass ratio） when compared with birds of other ME groups （P〈0.01）. However, CP levels had no significant influence on weight gain and FCR of broiler breeders （P〉 0.05）. An increase in dietary ME from 11.09 to 11.92 MJ·kg^-1 of diet significantly improved egg production, average egg weight, and daily egg mass （P〈0.05）. Diet containing 16.5% CP or 17.5% CP significantly increased the average egg weight and reduced the egg breakage of broiler breeders （P〈0.05） compared to 15.5% CP treatment. There was a significant interaction between ME and CP levels on unqualified egg percentage and hatchability （P〈0.05）. Chick birth weight was significantly improved by dietary 11.92 MJ·kg^-1 ME and 16.5% CP treatments when compared to 11.09 MJ·kg^-1 ME treatment and 15.5% CP treatment, repectively （P〈 0.05）. [Conclusion] The results indicated that the optimal dietary ME and CP level for Yellow-Feathered Broiler Breeders at 30-39-week of age was 11.92 MJ·kg^-1 and 16.5%, respectively, whose ME and CP requirements as units per hen per day was estimated to be 1.55 MJ and 21.45 g, respectively.
出处
《中国农业科学》
CAS
CSCD
北大核心
2012年第1期159-169,共11页
Scientia Agricultura Sinica
基金
国家公益性行业(农业)科研专项(200903006)
国家肉鸡产业技术体系项目(CARS-42)
关键词
代谢能
粗蛋白质
繁殖性能
岭南黄羽肉种鸡
metabolizable energy
crude protein
performance
Yellow-Feathered Broiler Breeders
