Evaluation of Nutritional Value of Eggs of Chinese Soft-Shell Turtle (Pelodiscus sinensis)

  • ZHANG Jun ,
  • OUYANG Xia ,
  • LU Jianfeng ,
  • ZHOU Qingyan ,
  • LIU Tiantian ,
  • SU Shiping ,
  • CUI Xuedong ,
  • WAN Quan
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  • 1. College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036;China;
    2. College of Biological and Food engineering, Hefei University of Technology, Hefei 230009, China;
    3. Cooperation Extension Service Center of Modern Agricultural Science and Technology of Mingguang, Mingguang 239400, China

Received date: 2019-04-19

  Online published: 2019-11-19

Abstract

The purpose of this experiment was conducted to evaluate the nutritional value of eggs of Chinese soft-shell turtle (Pelodiscus sinensis, P. sinensis). In order to determine the nutritional value of eggs of P. sinensis, a total of 400 P. sinensis eggs from Japanese population (200 eggs) and Yellow River population (200 eggs) were selected to detect the contents of basic nutrients, cholesterol, amino acids and fatty acids. The results showed that the contents of moisture, ash, crude protein and crude fat in egg white of two populations were 94.92% and 95.18%, 0.59% and 0.37%, 3.26% and 3.20%, 0.86% and 0.82%, respectively. The contents of moisture, ash, crude protein and crude fat in egg yolk of two populations were 67.81% and 69.01%, 1.85% and 1.98%, 21.22% and 21.15%, 10.47% and 8.91%, respectively. 2) The detection results of hydrolyzed amino acid contents showed that 17 kinds of hydrolyzed amino acids were detected in egg white and egg yolk of two populations. Among, the content of glutamic acid was the highest, followed by aspartic acid. The contents of total amino acids (TAA), essential amino acids (EAA) and delicious amino acids (DAA) in egg white of two populations were 557.61 and 461.43 mg/g, 212.90 and 175.01 mg/g, 213.49 and 176.61 mg/g, respectively. The contents of TAA, EAA and DAA in egg yolk of two populations were 567.72 and 536.04 mg/g, 215.73 and 203.09 mg/g, 212.43 and 201.50 mg/g, respectively. Referring to the evaluation and analysis of EAA composition, the percentages of EAA in egg white and egg yolk of two populations exceeded the reference values of amino acid pattern spectrum for human protein expect methionine+cysteine percentage, and they belonged to quality protein. The detection results of free amino acid contents displayed that the content of TAA in egg white of two populations were 23.38 and 26.08 mg/kg, respectively, and those in egg yolk were 11.13 and 13.53 mg/kg, respectively. The content of DAA in egg white of two populations were 12.12 and 12.63 mg/kg, accounting for 52% and 48% of the TAA content, respectively, and those in egg yolk were 11.13 and 13.53 mg/kg, accounting for 33% and 30% of the TAA content, respectively. 3) The content of saturated fatty acid, unsaturated fatty acid and cholesterol in egg yolk of two populations were 40.83% and 44.85%, 56.80% and 50.51%, 10.49 and 10.84 mg/g, respectively. Therefore, the eggs of P. sinensis have high moisture, crude protein, DAA content, low crude fat and cholesterol contents, and the amino acid composition satisfies the ideal amino acid model. Therefore, the eggs of P. sinensis have delicious taste and high nutritional value.

Cite this article

ZHANG Jun , OUYANG Xia , LU Jianfeng , ZHOU Qingyan , LIU Tiantian , SU Shiping , CUI Xuedong , WAN Quan . Evaluation of Nutritional Value of Eggs of Chinese Soft-Shell Turtle (Pelodiscus sinensis)[J]. Chinese Journal of Animal Nutrition, 2019 , 31(11) : 5100 -5110 . DOI: 10.3969/j.issn.1006-267x.2019.11.025

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