China Animal Husbandry and Veterinary Medicine ›› 2023, Vol. 50 ›› Issue (10): 3976-3984.doi: 10.16431/j.cnki.1671-7236.2023.10.011

• Nutrition and Feed • Previous Articles     Next Articles

Effects of Dietary Lysine on Laying Performance and Follicular Development in 22-33 Week Old Shanma Ducks

CUI Xiyu1, GUO Liang1, XIA Weiguang2, ZHANG Yanan2, WANG Shuang2, LYU Yantao3, ZHENG Chuntian1,2, CHEN Wei2   

  1. 1. Tianjin Key Laboratory of Agricultural Animal Breeding and Healthy Husbandry, College of Animal Science and Veterinary Medicine, Tianjin Agricultural University, Tianjin 300392, China;
    2. Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Swine and Poultry Breeding Industry, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affairs, Guangdong Pulic Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou 510640, China;
    3. College of Animal Science and Technology, Innovative Institute of Animal Healthy Breeding, Zhongkai University of Agriculture and Engineering, Guangzhou 510550, China
  • Received:2023-02-02 Online:2023-10-05 Published:2023-09-26

Abstract: 【Objective】 This experiment was conducted to investigate the effects of lysine levels on laying performance,egg quality,plasma biochemical index and follicle development in peak-laying Shanma ducks,so as to evaluate the lysine requirement of peak-laying ducks.【Method】 Five hundred and forty Shanma ducks with similar body weight were randomly assigned into 6 groups with 6 replicates of 15 ducks each.The ducks were fed diets with six lysine levels (0.75%,0.80%,0.85%,0.90%, 0.95% and 1.00%) for 12 weeks.The number and weight of eggs in each repeated per day were recorded.The egg laying rate,daily egg weight and feed-egg ratio were calculated at the end of the experiment.Three eggs were collected from each repeat to determine quality index,and two experimental ducks whose weight close to the average weight of each repeat were selected,slaughtered after collecting blood from wing vein.The ovaries,follicles and fallopian tubes were separated and collected to determine the weight,number and length.【Result】 Dietary lysine levels significantly affected the egg production,daily egg mass and feed/egg mass of 22-24 week old Shanma ducks (P<0.05),egg production and daily egg mass were highest and feed/egg mass was lowest in the 0.85% lysine group.Except for the egg shape index, the other egg quality indicators had no siginificant difference (P>0.05). Dietary lysine levels had no significant effect on plasma estradiol (E2) and luteinizing hormone (LH) concentrations in Shanma ducks (P>0.05),but significantly affected plasma follicle stimulating hormone (FSH) concentrations (P<0.05),plasma FSH concentration was lowest in the 0.85% lysine group.Dietary lysine levels had no significant effect on the weight of oviducts and ovaries,as well as the length of oviducts in Shanma ducks (P>0.05).The number of small yellow follicles and total follicles in the 0.85% lysine group were significantly higher than those in other groups (P<0.05).With the increase of dietary lysine level,the number of large yellow follicles and plasma uric acid content showed a quadratic curve (P<0.05).When the dietary lysine level was 0.87%,the number of large yellow follicles was the highest and plasma uric acid content was lowest.【Conclusion】 In summary,based on production performance,follicular development and plasma uric acid content,the appropriate level of dietary lysine for 22-33 week old Shanma ducks was 0.85%-0.87%.

Key words: lysine; laying ducks; laying performance; egg quality; follicular development

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