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Table 1 Effects of dietary selenium levels and sources on performance traits of 17-d-old broiler chickens

From: Selenium source and level on performance, selenium retention and biochemical responses of young broiler chicks

Selenium source1 Selenium levels, mg/kg Means SEM2 P-Value
0.0 0.08 0.16 0.24 0.32 Source Level S X L3 L4 Q5
Initial weight, g/bird
 SS 180.4 180.4 180.5 180.3 180.4 180.4 0.038 0.478 0.999 - - -
 SY 180.2 180.3 180.1 180.3 180.2 180.2       
Body weight, g/bird
 Means 510 490 508 502 494   6.84 0.432 0.019 0.144 0.180 0.977
 SS 514 487 497 b 500 498 499      0.378 0.104
 SY 506 AB 492 AB 521 Aa 502 AB 490 B 502      0.308 0.088
Average daily gain, g/bird/day
 Means 32.9 A 31.0 B 32.9 AB 32.1 AB 31.4 AB   0.672 0.429 0.017 0.132 0.165 0.977
 SS 33.3 30.7 31.6 b 31.9 31.7 31.9      0.366 0.097e
 SY 32.6 AB 31.3 B 34.1 Aa 32.2 AB 30.9 B 32.2      0.283 0.093f
Average daily feed intake, g/bird/day
 Means 47.3 45.5 47.2 46.4 45.9   0.790 0.661 0.122 0.107 0.847 0.160
 SS 48.5 a 45.6 46.1 b 46.4 46.0 46.6      0.090 0.122
 SY 46.0 b 45.3 48.2 a 46.4 45.8 46.3      0.847 0.160
Feed conversion rate, g/g
 Means 1.43 1.45 1.45 1.45 1.47   0.015 0.238 0.185 0.335 0.018 0.809
 SS 1.44 1.46 1.46 1.46 1.45 1.46      0.661 0.449
 SY 1.42 B 1.44 AB 1.44 AB 1.44 AB 1.48 A 1.44      0.004 0.616
  1. 1 SS sodium selenite, SY selenium enriched-yeast
  2. 2 Standard error of means
  3. 3 Interactive effects between selenium and trace minerals sources and selenium levels
  4. 4 Linear effect of supplementation selenium levels
  5. 5 Quadratic effect of supplementation selenium levels
  6. A-B Different uppercase letters in the same line and lowercase letters in the same column are different by Tukey test at 5%
  7. ef Different superscripts letter indicates difference in the orthogonal contrasts between equations