Improvement of straw decomposition and rice growth through co-application of straw-decomposing inoculants and ammonium nitrogen fertilizer

Table 2 Panicle number, spikelet per panicle, filled-grain percentage, 1000-grain weight and grain yield under different treatments in 2019 and 2020

Year	Treatment	Panicle (10⁴/ha)	Spikelet per panicle	Filled-grain percentage (%)	1000-Grain weight (g)	Grain yield (kg/ha)
2019	CK	229 ± 7f	181 ± 4b	76.89 ± 3.67d	26.78 ± 0.31c	7427 ± 142f
	A0	271 ± 10de	187 ± 2a	81.88 ± 0.89c	28.91 ± 0.16b	10,245 ± 50d
	A2	283 ± 2bc	172 ± 3c	85.00 ± 0.75b	29.53 ± 0.34a	10,520 ± 30c
	A3	266 ± 1e	186 ± 2ab	77.99 ± 2.88d	28.57 ± 0.24b	9930 ± 40e
	IA2	290 ± 5b	181 ± 3b	85.22 ± 1.28b	29.11 ± 0.40ab	10,746 ± 85b
	IA3	310 ± 2a	185 ± 3ab	88.17 ± 0.80a	29.19 ± 0.63ab	11,478 ± 158a
	IA4	278 ± 7 cd	190 ± 3a	78.63 ± 2.04d	28.89 ± 0.29b	10,445 ± 121c
2020	CK	180 ± 7d	143 ± 10d	71.08 ± 0.50d	28.07 ± 0.13e	6427 ± 143e
	A0	207 ± 10d	184 ± 2c	75.65 ± 0.96c	28.49 ± 0.15d	8950 ± 75d
	A2	238 ± 6b	183 ± 1c	80.37 ± 0.24a	29.63 ± 0.11ab	9430 ± 90b
	A3	213 ± 4c	206 ± 11a	75.11 ± 1.51c	28.65 ± 0.04d	8820 ± 150d
	IA2	231 ± 4b	192 ± 1b	78.56 ± 0.64b	29.89 ± 0.15a	9450 ± 22b
	IA3	252 ± 2a	200 ± 2a	81.39 ± 1.09a	29.30 ± 0.21c	10,235 ± 316a
	IA4	233 ± 6b	192 ± 1b	77.51 ± 1.22bc	29.47 ± 0.14bc	9227 ± 51c
Year		**	*	*	ns	**
Treatment		**	**	**	**	**
Year * Treatment		ns	ns	ns	ns	ns

Note: Different letters indicate significant differences among the different treatments in the same year (p < 0.05). * Significant at p < 0.05; ** Significant at p < 0.01; ns, not significant. ANUE, apparent nitrogen use efficiency; AE, agronomic NUE; PNUE, physiological NUE; PFP_N, partial factor productivity of N

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