. 2021 Apr 20;100(7):101188. doi: 10.1016/j.psj.2021.101188

Table 1.

Chemical profile (LSM±SEM) of individual component samples representing substrates contributing to poultry dust as determined by combustion and ICP-OES analyses.

	Chemical analysis (LSM±SEM) of samples of different potential components of dust
Element	Feed (n = 6)	Excreta (n = 2)	Feather (n = 2)	Wood shavings (n = 2)	Rice hulls (n = 2)	P-value	Coefficient of Variation (CV %)
C (%)	43.3 ± 0.5^b	36.2 ± 0.8^cd	39.9 ± 0.8^c	47.0 ± 0.8^a	34.9 ± 0.8^d	<0.001	10
N (%)	3.7 ± 0.1^b	4.0 ± 0.2^b	13.3 ± 0.2^a	0.1 ± 0.2^c	0.4 ± 0.2^c	<0.001	102
Al (µg/g)	85 ± 76^b	1024 ± 131^a	57 ± 131^b	41 ± 131^b	125 ± 131^b	0.002	176
B (µg/g)	15 ± 5^a	33 ± 9^a	2 ± 9^a	3 ± 9^a	15.3 ± 9^a	0.22	104
Ca (%)	1.4 ± 0.3^b	4.9 ± 0.6^a	0.1 ± 0.6^b	0.1 ± 0.0^b	0.1 ± 0.0^b	<0.001	132
Co (µg/g)	0.0 ± 0.1^b	0.3 ± 0.1^a	0.0 ± 0.1^b	0.0 ± 0.1^b	0.0 ± 0.1^b	0.002	283
Cr (µg/g)	2 ± 4^b	10 ± 6^b	24 ± 6^b	7 ± 6^b	193 ± 6^a	<0.001	198
Cu (µg/g)	67 ± 18^a	71 ± 31^a	8 ± 31^a	3 ± 31^a	4 ± 31^a	0.22	118
Fe (µg/g)	172 ± 45^b	780 ± 77^a	188 ± 77^b	47 ± 77^b	1105 ± 77^a	<0.001	105
K (%)	1.0 ± 0.2^ab	2.1 ± 0.4^a	0.2 ± 0.4^b	0.1 ± 0.4^b	0.9 ± 0.4^ab	0.02	87
Mg (%)	0.2 ± 0.1^b	0.6 ± 0.1^a	0.1 ± 0.1^b	0.1 ± 0.1^b	0.1 ± 0.1^b	<0.001	104
Mn (µg/g)	130 ± 32^b	364 ± 55^a	11 ± 55^b	45 ± 55^b	366 ± 55^a	0.003	87
Mo (µg/g)	2.9 ± 0.8^b	5.1 ± 1.0^a	0.0 ± 1.0^b	0.1 ± 1.0^b	0.0 ± 1.0^b	0.04	124
Na (µg/g)	2338 ± 831^b	8046 ± 1440^a	1580 ± 1440^ab	49 ± 1440^b	112 ± 1440^b	0.02	129
P (%)	0.8 ± 0.1^b	2.0 ± 0.3^a	0.1 ± 0.1^c	0.0 ± 0.0^b	0.1 ± 0.0^a	<0.001	110
S (%)	0.3 ± 0.0^b	0.4 ± 0.0^b	2.3 ± 0.0^a	0.0 ± 0.0^c	0.0 ± 0.0^c	<0.001	144
Se (µg/g)	0.8 ± 0.2^a	1.0 ± 0.4^a	0.7 ± 0.4^a	0.2 ± 0.4^a	0.1 ± 0.4^a	0.31	93
Zn (µg/g)	127 ± 25^b	331 ± 43^a	178 ± 43^ab	3 ± 43^b	10 ± 43^b	0.003	91

Means within rows that do not share a common letter in the superscript differ significantly (P < 0.05).

P-values shown in bold font indicate a significant difference between high (bold) and low (underlined) group means.