ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (2): 439-448.doi: 10.11843/j.issn.0366-6964.2018.02.024

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Effects of Dietary Energy Concentrations on Growth Performance, Egg Quality and Hatching Performance in Primiparous Laying Sichuan White Geese

LUO Yi1, LIU Zuo-lan1,2, WANG Qi-gui1, PENG Xiang-wei1, WANG Yang-ming1, XIE Ming3, HOU Shui-sheng3, LAN Yun-xian2, WANG Chao1*   

  1. 1. Chongqing Academy of Animal Sciences, Rongchang 402460, China;
    2. Rongchang Campus of Southwest University, Rongchang 402460, China;
    3. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2017-05-13 Online:2018-02-23 Published:2018-02-23

Abstract:

This experiment was conducted to investigate the effects of dietary energy concentrations on production performance, egg quality and hatching performance in primiparous laying Sichuan White geese, and explore the optimal dietary energy concentration of primiparous laying Sichuan White geese. Two hundred fifty 26 weeks old female Sichuan White geese were randomly allotted into 5 dietary treatments with 5 dietary metabolizable energy (ME) concentrations(9.14, 10.01, 10.88, 11.75 and 12.62 MJ·kg-1) containing 10 replicate pens with 5 birds per pen. And 1 male goose was put into each repeating group, respectively. The experiment lasted for 12 weeks. According to replicate, the egg weight and egg number for everyday was recorded to examine the egg production performance. Two goose eggs from each replicate group were selected for determination of egg quality.All qualified eggs were selected to hatch for determination of hatching performance. The results showed that:1) The final body weight and average daily gain of birds fed diets containing 10.88,11.75 and 12.62 MJ·kg-1 ME were significantly higher than those birds fed diets containing 9.14 and 10.01 MJ·kg-1 ME (P<0.05). 2) The average egg weight, daily laying rate of birds fed diets containing 10.88, 11.75 and 12.62 MJ·kg-1 ME were significantly higher than those birds fed diets with 9.14 and 10.01 MJ·kg-1 ME (P<0.05). The feed egg ratio of birds fed diets containing 10.88, 11.75 and 12.62 MJ·kg-1 ME were significantly lower than those birds fed diets containing 9.14 and 10.01 MJ·kg-1 ME (P<0.05). The dietary energy concentration did not significantly affect the age at the first egg and the weight of the first egg in Sichuan White geese (P>0.05).3) The albumen height and Haugh unit of geese egg in 10.01, 10.88 and 11.75 MJ·kg-1 ME groups were significantly higher than those in 9.14 and 12.62 MJ·kg-1 ME groups(P<0.05). The yolk color of birds fed diets with 10.88, 11.75 and 12.62 MJ·kg-1 ME were significantly higher than those birds fed diets with 9.14 and 10.01 MJ·kg-1 ME (P<0.05). The birds fed diets with 10.01, 10.88 and 11.75 MJ·kg-1 ME had higher egg specific gravity than those birds fed diets with 9.14 MJ·kg-1 ME (P<0.05). 4) Dietary energy concentration did not significantly affect fertility of birds (P>0.05). The hatchability of fertile eggs in birds fed diet containing 11.75 MJ·kg-1 ME was higher than those birds fed diets with 9.14, 10.01 and 12.62 MJ·kg-1 ME (P<0.05). 5) Based on cubic curve model analysis, the optimal energy concentration in primiparous laying Sichuan White geese were 11.93, 11.91 and 11.83 MJ·kg-1 ME, the average egg weight, daily laying rate and hatchability of fertile eggs were as the indicators, respectively. Collectively, the 11.83 MJ·kg-1 ME can meet the energy requirement of primiparous laying Sichuan White geese.

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