. 2017 Mar 10;7:44049. doi: 10.1038/srep44049

Table 3. Absolute abundances (copies g⁻¹ dry weight soil), ratios and relative abundances of genes involved in nitrification and denitrification in soils with different categories.

	Urban turfgrass	Suburban turfgrass	Rural farmland
Archaeal 16 S rRNA (10⁹)	0.50 ± 0.05^b	0.66 ± 0.25^ab	1.29 ± 0.14^a
Bacterial 16 S rRNA (10¹⁰)	1.34 ± 0.13^b	1.30 ± 0.24^b	3.37 ± 0.34^a
AOA (10⁸)	1.86 ± 0.22^a	0.28 ± 0.09^b	0.41 ± 0.04^b
AOB (10⁷)	0.30 ± 0.06^b	0.89 ± 0.04^b	3.10 ± 0.83^a
nirK (10⁸)	1.91 ± 0.19^b	1.98 ± 0.40^b	4.06 ± 0.37^a
nirS (10⁹)	0.22 ± 0.04^b	0.55 ± 0.13^b	2.16 ± 0.27^a
nosZ I (10⁸)	0.26 ± 0.03^b	0.36 ± 0.07^b	1.16 ± 0.08^a
nosZ II (10⁸)	1.06 ± 0.20^ab	0.59 ± 0.13^b	1.76 ± 0.24^a
AOA/AOB	135.64 ± 26.41^a	58.73 ± 19.97^ab	2.08 ± 0.53^b
nirK/nirS	1.92 ± 0.31^a	1.11 ± 0.43^ab	0.20 ± 0.02^b
nosZ I/nosZ II	0.45 ± 0.05^b	1.11 ± 0.25^a	0.73 ± 0.09^a
nir/nos*	4.80 ± 0.74^b	9.71 ± 1.62^a	9.62 ± 1.37^a
AOA/16 S**	0.45 ± 0.05^a	0.36 ± 0.24^ab	0.03 ± 0.01^b
AOB/16 S (10⁻⁴)	2.19 ± 0.32^b	3.79 ± 1.66^ab	9.46 ± 2.28^a
nirK/16 S (10⁻²)	1.51 ± 0.11^a	1.46 ± 0.06^a	1.37 ± 0.30^a
nirS/16 S (10⁻²)	1.75 ± 0.36^b	6.80 ± 1.55^a	7.07 ± 1.06^a
nosZ I/16 S (10⁻³)	1.97 ± 0.12^b	3.49 ± 0.58^a	3.73 ± 0.47^a
nosZ II/16 S (10⁻³)	7.97 ± 1.32^a	5.80 ± 1.01^a	5.82 ± 1.22^a

Values are given as mean ± standard deviation (n = 32, 16, 8 for Urban, Suburban and rural, respectively). *nir/nos, (nirK + nirS)/(nosZ I + nosZ II). **16 S, archaeal 16 S rRNA for AOA and bacterial 16 S rRNA for the others. Differences are significant when no same letter exists between categories (p < 0.05).

Table 3. Absolute abundances (copies g−1 dry weight soil), ratios and relative abundances of genes involved in nitrification and denitrification in soils with different categories.

Table 3. Absolute abundances (copies g⁻¹ dry weight soil), ratios and relative abundances of genes involved in nitrification and denitrification in soils with different categories.