摘要
将１０００羽（♂∶♀为１∶９）１日龄绍鸭进行分组饲养，研究了在等能（ＭＥ：计算值为１１．９２ＭＪ／ｋｇ，实测值为１１．５１ＭＪ／ｋｇ）条件下，９个不同粗蛋白水平系列（ＣＰ：在０～４，５～１２和１３～１８周龄阶段分别为２２％，１８％，１６％；２０％，１８％，１６％；２０％，１６％，１４％；１８％，１８％，１６％；１８％，１６％，１６％；１８％，１６％，１４％；１６％，１６％，１４％；１６％，１４％，１２％；１４％，１４％，１２％）的育成饲粮对绍鸭育成后产蛋性能的影响．结果表明：生长期中喂以不同ＣＰ系列饲粮的试鸭，其５０％和８０％的产蛋率及１９～３０周龄的平均蛋重差异显著（ｐ＜０．０５），其余产蛋性能指标均无显著差异．高ＣＰ系列组的蛋重较大，而低ＣＰ系列组的产蛋率和１９～３０周龄的总产蛋量及饲料报酬较高．达５０％和８０％产蛋率的日龄（ｒ＝０．５３６，ｐ＞０．０５和ｒ＝０．５８５，ｐ＞０．０５）和平均蛋重（ｒ＝０．４８１，ｐ＞０．０５和ｒ＝０．６６４，ｐ＜０．０５）与０～１８周龄的ＣＰ消耗量间均有不同程度的正相关；１９～３０周龄的平均蛋重（ｒ＝０．８９６，ｐ＜０．０１）和平均产蛋率（ｒ＝－０．３３９）与生长期ＣＰ?
A grouped feeding trail was conducted with 1 000 one day old Shaoxing ducks (male∶female=1∶9) fed on 9 isoenergetic diets (ME: 11.92 MJ/kg, calculated or 11.51 MJ/ kg, determined) in different crude protein (CP) squences (22%, 18% and 16% for 0-4, 5-12 and 13-18 weeks respectively, 20%,18% and 16%, 20%,16% and 14%, 18%,18% and 16%, 18%,16% and 14%, 18%,14% and 12%, 16%,16% and 14%, 16%, 14% and 12% and 14%,14% and 12%) to study the effect of dietary CP levels in the rearing period on egg laying performance of Shaoxing ducks in the laying period (each fed the same layer diet containing ME 11 51 MJ/kg and CP18%) The results indicated that the average egg weights at 50% and 80% egg production (EP) and 19-30 weeks of age for ducks received higher CP series during the rearing period were significant heavier ( p <0 05), whereas birds fed lower CP series produced more eggs and higher total egg production during the laying period (19-30 weeks of age) There was no significant di fference ( p >0 05) in age at the first egg laying, 50% and 80% EP and overall laying performance for the first 10 weeks after the day of 50% EP among ducks on different CP series during the growing period except for egg weight There were some extent positive correlation between ages up to 50% and 80% EP( r =0 536, p >0 05 and r =0 585, p >0 05) and average egg weights ( r =0 481, p >0 05 and r =0 664, p <0 05) and CP intake (CPI) in the rearing period (0～18 weeks of age) There was significant positive correlation between average egg weight from 19～30 weeks of age ( r =0 896, p <0 01) and CPI in the rearing period, and a certain extent negative correlation between average egg production from 19～30 weeks of age ( r =-0 339, p > 0 05 ) and CPI during the rearing period It is suggested that the proper CP levels in diets containing ME 11 51 MJ/kg are 16%-18%, 14%-16% and 12%-13% or CP:ME ratio (g/MJ): 13.9-15.6, 12.2- 13.9 and 10.4-11.3 for growing duck from 0-4, 5-12 and 13-18 weeks of age, respectively
关键词
绍鸭
等能饲粮
粗蛋白系列
产蛋性能
Shaoxing duck
isoenergetic diet
crude protein sequence
egg laying performance
