. 2019 May 25;9(5):280. doi: 10.3390/ani9050280

Table 3.

Effect of zinc supplementation, with and without phytase addition, on Zn retention and tissue and excrement concentrations, and plasma Zn and Cu concentrations in White Pekin ducks *.

	Zn Retention (%)	Tibia Ash (%)	Tibia Zn (ppm)	Liver Zn (ppm)	Excrement Zn (ppm)	Plasma Zn (mg/100 mL)	Plasma Cu (mg/100 mL)
Zn addition
0 ppm	37.67 ^a	44.65	161.3 ^b	61.3 ^b	72.15 ^b	160.1 ^b	6.61 ^b
30 ppm	35.17 ^b	45.13	165.4 ^a	63.4 ^a	160.0 ^a	189.3 ^a	7.22 ^a
Phytase inclusion
0 U/kg diet	35.90	45.15	162.8 ^b	61.0 ^b	117.6 ^a	164.9 ^b	5.93 ^b
500 U/kg diet	36.96	44.63	164.0 ^a	63.7^a	114.3 ^b	184.0 ^a	8.28^a
Interaction between Zn and phytase
0 ppm Zn + 0 U phytase	36.64	44.46 ^b	160.6	60.7	74.06	149.2 ^d	5.23^d
0 ppm Zn + 500 U phytase	38.70	44.91 ^a	161.9	61.8	70.06	169.0 ^c	7.97 ^b
30 ppm Zn + 0 U phytase	35.12	45.91 ^a	165.0	61.4	161.2	180.7 ^b	6.63 ^c
30 ppm Zn +500 U phytase	35.22	44.36 ^b	165.7	65.5	158.4	197.6 ^a	8.60 ^a
p value
Zn addition	0.0008	0.2795	0.0001	0.0367	0.0001	0.0001	0.0001
Phytase concentration	0.0918	0.2429	0.0458	0.0126	0.0001	0.0001	0.0001
Interaction	0.1232	0.0302	0.5068	0.1378	0.4466	0.0006	0.0001
RMSE	1.346	0.958	1.072	2.12	1.491	0.736	0.164

* n = 20 samples as five sample per each treatment. RMSE, Root mean square error. ^a–d means with different superscripts in the same column in similar treatment groups are significantly different; NS, not significant.