Effects of Stevia Residues on Growth Performance and Serum Biochemical Indexes of Meat Geese during 21 to 70 Days of Age

  • CHEN Xiaolian ,
  • CHEN Shoujin ,
  • ZHAO Pin ,
  • LIU Linxiu ,
  • ZOU Zhiheng ,
  • SONG Qiongli ,
  • ZHOU Zhongdong ,
  • XIE Huasheng ,
  • WEI Qipeng ,
  • LIU Sanfeng
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  • 1. Institute of Animal Husbandry and Veterinary, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;
    2. Jiangxi Xingguo Gray Goose Factory, Ganzhou 342400, China;
    3. College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China

Received date: 2020-03-25

  Online published: 2020-11-16

Abstract

This experiment was conducted to analyze the nutrient contents and apparent utilization rates of stevia residues, and study the effects of stevia residues on growth performance and serum biochemical indexes of meat geese during 21 to 70 days of age. Firstly, the nutrient contents of stevia residues were analyzed by proximate analysis, then forced-feeding metabolism experiment was used to measure the nutrient apparent utilization rates of meat geese, at last, a feeding experiment was conducted with two hundred and fifty 21-day-old Landes female geese with similar body weight. The geese were randomly divided into 5 groups with 5 replicates in each group and 10 geese in each replicate. The control group was fed a basal diet without stevia residues, and experimental groups were fed diets supplemented with 5%, 10%, 15% and 20% stevia residues, respectively. The feeding experiment lasted for 49 days. The results showed as follows: 1) there were rich nutrients in stevia residues with 13.2% crude protein, 31% crude fibre, 1.13% calcium and 0.49% total phosphorus. The major nutrient apparent utilization rates for meat geese were as follows: crude protein 18.24%, crude fibre 56.99%, calcium 46.59% and total phosphorus 43.82%, respectively. 2) During 21 to 42 days of age, compared with the control group, dietary supplemented with 10%, 15% and 20% stevia residues significantly improved the average daily feed intake of meat geese (P<0.05), and dietary supplemented with 5% and 10% stevia residues significantly increased the average daily gain of meat geese (P<0.05). The feed to gain ratio firstly decreased and then increased quadratically with dietary stevia residue level increased (P<0.05), according to the regression analysis, when the supplemental level of stevia residues was 7.0%, the feed to gain ratio of meat geese during 21 to 42 days of age achieved the lowest. Dietary stevia residues had no significant effects on the average daily feed intake, average daily gain and feed to gain ratio of meat geese during 43 to 70 days of age (P>0.05). During to the whole experimental period (21 to 70 days of age), compared with the control group, dietary supplemented with 10%, 15% and 20% stevia residues significantly improved the average daily feed intake of meat geese (P<0.05), dietary supplemented with 5% stevia residues significantly increased the average daily gain of meat geese (P<0.05), and dietary supplemented with 5% stevia residues significantly decreased the feed to gain ratio of meat geese (P<0.05). 3) The serum alkaline phosphatase activity of meat geese at 42 days of age firstly increased and then decreased quadratically with dietary stevia residue level increased (P<0.05), according to the regression analysis, when the supplemental level of stevia residues was 11.35%, the serum alkaline phosphatase activity of meat geese at 42 days of age was highest. Dietary stevia residues had no significant effects on total protein, albumin and urea nitrogen contents and aspartate aminotransferase and alanine aminotransferase activities in serum of meat geese at 42 days of age (P>0.05). Dietary stevia residues had no significant effects on serum biochemical indexes of meat geese at 70 days of age (P>0.05). In conclusion, dietary supplemented with appropriate level of stevia residues can improve the growth performance of geese and have no significant effects on serum biochemical indexes. Stevia residues can be applied to geese dietary, according to the feed to gain ratio minimum limit, the suggested dietary supplemental level of stevia residues of meat geese during 21 to 70 days age is 5% to 10%.

Cite this article

CHEN Xiaolian , CHEN Shoujin , ZHAO Pin , LIU Linxiu , ZOU Zhiheng , SONG Qiongli , ZHOU Zhongdong , XIE Huasheng , WEI Qipeng , LIU Sanfeng . Effects of Stevia Residues on Growth Performance and Serum Biochemical Indexes of Meat Geese during 21 to 70 Days of Age[J]. Chinese Journal of Animal Nutrition, 2020 , 32(11) : 5406 -5414 . DOI: 10.3969/j.issn.1006-267x.2020.11.047

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