Effects of Dietary Soybean Oil Supplemental Level on Slaughter Performance, Laying Performance, Egg Quality and Serum Biochemical Indices of Laying Ducks during Last Laying Period

LI Chuang; ZHANG Xiang; HUANG Xuan; ZHANG Xu; DAI Qiuzhong; JIANG Guitao

doi:10.3969/j.issn.1006-267x.2020.09.055

2020 , Vol. 32 >Issue 9: 4441 - 4448

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.09.055

Effects of Dietary Soybean Oil Supplemental Level on Slaughter Performance, Laying Performance, Egg Quality and Serum Biochemical Indices of Laying Ducks during Last Laying Period

LI Chuang ,
ZHANG Xiang ,
HUANG Xuan ,
ZHANG Xu ,
DAI Qiuzhong ,
JIANG Guitao

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1. Hunan Institute of Animal Science and Veterinary Medicine, Changsha 410131, China;
2. Hunan Engineering Research Center of Poultry Production Safety, Changsha 410128, China;
3. Medical College, Yan'an University, Yan'an 716000, China

Received date: 2020-03-02

Online published: 2020-09-17

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Abstract

The objective of this study was to investigate the effects of dietary soybean oil supplemental level on slaughter performance, laying performance, egg quality and serum biochemical indices of laying ducks during last laying period, and to explore whether soybean oil added to the diet of laying ducks during last laying period could stabilize production performance and improve slaughter performance. One hundred and twenty 500-day-old female Linwu ducks with body weight of 1.90 kg were randomly allocated to 5 groups with 4 replicates per group and 6 ducks per replicate. Ducks in the control group was fed a basal diet, while others in experimental groups were fed basal diets supplemented with 1.00%, 2.00%, 3.00% and 4.00% soybean oil respectively. The experiment lasted for 28 days. The results showed as follows:1) dietary soybean oil supplemental level had no significant effects on the semi-eviscerated percentage, eviscerated percentage, abdominal fat percentage, breast muscle percentage and leg muscle percentage of laying ducks during last laying period (P>0.05). The dressing percentage of 2.00% supplemental group was the highest, and significantly higher than that of the control group and 4.00% supplemental group (P<0.05). 2) Dietary soybean oil supplemental level had no significant effects on the average egg weight, qualified rate of egg, daily egg yield and feed/egg of laying ducks during last laying period (P>0.05). The laying rate and average daily feed intake of the control group were significantly higher than those of 3.00% and 4.00% supplemental groups (P<0.05 or P<0.01), but had no significant difference with 1.00% and 2.00% supplemental groups (P>0.05). 3) Dietary soybean oil supplemental level had no significant effects on the egg quality indices of laying ducks during last laying period (P>0.05). 4) The contents of triglyceride and glucose in serum of 2.00%, 3.00% and 4.00% supplemental groups were significantly higher than those of the control group (P<0.05 or P<0.01), and the serum total cholesterol content of 4.00% supplemental group was significantly higher than that of the control group and 1.00% supplemental group (P<0.05). In conclusion, dietary supplemented with 1.00% and 2.00% soybean oil have no adverse effects on laying performance and egg quality of laying ducks during last laying period, but dietary 2.00% soybean oil supplemental level can improve the slaughter performance of laying ducks. In production practice, it can supplement with 2.00% soybean oil in diets of laying ducks during last laying period.

Key words： laying ducks during last laying period; soybean oil; slaughter performance; laying performance; serum biochemical indices

Cite this article

LI Chuang , ZHANG Xiang , HUANG Xuan , ZHANG Xu , DAI Qiuzhong , JIANG Guitao . Effects of Dietary Soybean Oil Supplemental Level on Slaughter Performance, Laying Performance, Egg Quality and Serum Biochemical Indices of Laying Ducks during Last Laying Period[J]. Chinese Journal of Animal Nutrition, 2020 , 32(9) : 4441 -4448 . DOI: 10.3969/j.issn.1006-267x.2020.09.055

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