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. 2020 Nov 9;11:542466. doi: 10.3389/fphys.2020.542466

TABLE 3.

Changes in the crop attributes during the scotophase.

Time relative to the beginning
of the scotophase (night/darkness)
0→+1 h +5 h +9→10 h
Laying henp
Crop contents g 46.0 ± 5.4c 18.1 ± 4.1b 1.9 ± 1.0c
Soluble carbohydrate% of dry wt. of contents 17.1 ± 0.5a 18.3 ± 4.2a 8.5 ± 1.1b
Proventriculus/gizzard contents g 28.8 ± 2.6c 21.4 ± 1.3b 15.5 ± 1.5a
Young meat-type chickenq
Crop contents g 28.4 ± 6.9c 11.6 ± 3.5b 0.2 ± 0.08c
Proventriculus/gizzard contents g 22.2 ± 3.0b 11.0 ± 1.9a 7.4 ± 1.5a
Turkey poultr
Contents g 22.2 ± 2.4a 22.4 ± 3.9a 13.2 ± 2.3b
Moisture% 39.4 ± 2.3a 29.5 ± 1.4b 29.7 ± 2.1b
pH 5.9 ± 0.1a 5.0 ± 0.2b 5.0 ± 0.2b
Lactic acid μMoles g–1 13.4 ± 4.5a 93.3 ± 17.4b 98.4 ± 11.4b
Caproic acid (C6) μMoles g–1 0.17 ± 0.02a 0.87 ± 0.28b 1.33 ± 0.06b
Valeric acid (C5) μMoles g–1 0.13 ± 0.04a 0.11 ± 0.03a 0.83 ± 0.11b

a,b,cDifferent superscript letters indicate difference p < 0.05. pScanes et al. (1987). qBuyse et al. (1993). rJohannsen et al. (2005).