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Table 5 Egg quality results (n = 11)

From: Soya saponin improves egg-laying performance and immune function of laying hens

Time, week Group Eggshell strength, kg/cm2 Albumen hight, mm Haugh unit Egg yolk color Eggshell thickness, mm
1st-3rd (23–25 weeks old) Control 4.27 ± 0.28a 8.93 ± 1.00 94.61 ± 5.82 7.85 ± 0.42 0.351 ± 0.015a
50 ppm SS 4.50 ± 0.28ab 9.05 ± 1.71 93.51 ± 8.61 7.73 ± 0.36 0.349 ± 0.016a
500 ppm SS 4.73 ± 0.33b 9.16 ± 1.45 97.37 ± 6.42 7.82 ± 0.34 0.364 ± 0.007b
P-value 0.004 0.931 0.428 0.744 0.026
4th–6th
(26–28 weeks old)
Control 4.53 ± 0.18 8.21 ± 1.48ab 90.85 ± 8.29 7.48 ± 0.28 0.366 ± 0.010a
50 ppm SS 4.73 ± 0.53 8.72 ± 0.49b 92.59 ± 3.98 7.67 ± 0.37 0.375 ± 0.009b
500 ppm SS 4.52 ± 0.10 7.38 ± 0.89a 88.49 ± 6.50 7.73 ± 0.25 0.365 ± 0.008a
P-value 0.263 0.017 0.345 0.161 0.03
7th–9th
(29–31 weeks old)
Control 4.47 ± 0.47a 8.85 ± 0.71 94.31 ± 5.57 7.21 ± 0.40 0.363 ± 0.015a
50 ppm SS 4.94 ± 0.48b 8.90 ± 0.73 94.37 ± 4.02 7.31 ± 0.27 0.378 ± 0.013b
500 ppm SS 4.24 ± 0.42a 9.35 ± 1.14 97.20 ± 4.31 7.09 ± 0.37 0.359 ± 0.009a
P-value 0.004 0.362 0.271 0.346 0.003
  1. During the trial, a repeat group was randomly selected from each treatment every 3 weeks, and all the eggs in this repeat group were collected for egg quality determination. The data in Table 5 different superscript letters indicate significant difference (P < 0.05); same superscript letters indicate no difference (P > 0.1), the same below