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

Table 2.

Effect of zinc supplementation, with and without phytase addition, on body weight gain, feed intake and feed conversion ratio of ducks *.

Treatment Group	BWG (g/Bird/Period)			Feed Intake (g/Bird/Period)			FCR (g/Bird/Period)			Dead (n)
Treatment Group	1–28 day	29–56 day	1–56 day	1–28 day	29–56 day	1–56 day	1–28 day	29–56 day	1–56 day	Dead (n)
Zn addition
0 ppm	1010 ^b	916 ^b	1926 ^b	1931 ^b	4182 ^b	6114 ^b	1.91	4.59	3.18 ^a	3
30 ppm	1079 ^a	965 ^a	2044 ^a	1991 ^a	4307 ^a	6297 ^a	1.85	4.46	3.08 ^b	1
Phytase inclusion
0 U/kg diet	1032	910 ^b	1942 ^b	1961	4247	6209	1.91	4.67^a	3.20 ^a	2
500 U/kg diet	1056	970 ^a	2026 ^a	1960	4242	6202	1.86	4.38^b	3.06 ^b	2
Interaction between Zn and phytase
0 ppm Zn + 0 U phytase	974 ^d	855 ^b	1830 ^b	1937	4189	6126	1.99 ^a	4.90 ^a	3.35 ^a	2
0 ppm Zn + 500 U phytase	1045 ^c	976 ^a	2021 ^a	1924	4175	6100	1.84 ^b	4.28 ^b	3.02 ^b	1
30 ppm Zn + 0 U phytase	1089 ^a	966 ^a	2054 ^a	1985	4305	6291	1.82 ^b	4.46 ^b	3.06 ^b	0
30 ppm Zn +500 U phytase	1068 ^b	965 ^a	2032 ^a	1995	4308	6303	1.87 ^b	4.47 ^b	3.10 ^a,b	1
p value
Zn addition	0.0003	0.0023	0.0004	0.0295	0.0364	0.0336	0.1071	0.0711	0.0471	NS
Phytase inclusion	0.1191	0.0005	0.0007	0.9529	0.9221	0.9323	0.2344	0.0021	0.0077	NS
Interaction	0.0069	0.004	0.0002	0.6578	0.8849	0.8089	0.0289	0.0022	0.0012	NS
RMSE	33.15	30.6	45.17	55.23	121.6	176.5	0.094	0.149	0.105	0.94

* n = 180 bird as 45 bird per treatment group for body weight gain and n = 20 replicates as five replicates per each treatment for feed intake and feed conversion ratio. RMSE, Root mean square error. ^a–d means with different superscripts in the same column in similar treatment group are significantly different; NS, not significant.