Effects of ground bamboo application on weed suppression and rice production: a 3-year paddy field experiment

Table 5 Effects of treatment on the physicochemical properties of rice straw in the paddy field experiments conducted in 2018–2019

Parameter	Control	Manual	L-bam	M-bam	H-bam	df	F	P
2018
Air-dry weight (g 15 plants⁻¹)	241.54 ± 41.98	283.04 ± 24.39	218.42 ± 66.12	292.64 ± 28.97	320.72 ± 35.19	4, 11	0.730	0.590
Total carbon (%)	37.12 ± 1.30	36.77 ± 0.40	36.42 ± 0.27	35.92 ± 0.11	35.57 ± 0.30	4, 11	0.648	0.640
Total nitrogen (%)	0.64 ± 0.04	0.69 ± 0.10	0.65 ± 0.04	0.64 ± 0.04	0.62 ± 0.05	4, 11	0.182	0.943
Phosphorus pentoxide (%)	0.26 ± 0.02	0.32 ± 0.03	0.28 ± 0.01	0.27 ± 0.02	0.24 ± 0.01	4, 11	2.206	0.135
Potassium oxide (%)	2.13 ± 0.20	2.08 ± 0.12	2.13 ± 0.14	2.34 ± 0.11	2.57 ± 0.13	4, 11	1.585	0.246
Silicic acid (%)	15.43 ± 0.40	14.27 ± 0.35	15.23 ± 0.41	15.20 ± 0.32	14.93 ± 0.35	4, 11	1.439	0.285
2019
Air-dry weight (g 15 plants⁻¹)	147.42 ± 24.45	138.66 ± 23.38	104.04 ± 22.17	150.89 ± 20.27	180.71 ± 38.33	4, 11	0.643	0.643
Total carbon (%)	35.70 ± 0.08	36.23 ± 0.30	35.94 ± 0.19	35.85 ± 0.21	35.92 ± 0.22	4, 11	0.982	0.456
Total nitrogen (%)	0.64 ± 0.05	0.61 ± 0.06	0.61 ± 0.03	0.56 ± 0.03	0.58 ± 0.05	4, 11	0.543	0.708
Phosphorus pentoxide (%)	0.27 ± 0.01	0.30 ± 0.01	0.30 ± 0.02	0.31 ± 0.01	0.29 ± 0.01	4, 11	1.761	0.207
Potassium oxide (%)	1.83 ± 0.18	1.85 ± 0.07	1.77 ± 0.06	1.95 ± 0.08	2.03 ± 0.07	4, 11	0.727	0.591
Silicic acid (%)	15.50 ± 0.14	14.50 ± 0.47	15.03 ± 0.52	15.03 ± 0.48	14.73 ± 0.55	4, 11	0.846	0.525

Values are means ± standard error. Summary statistics of the generalized linear models are provided in the last three columns. Manual, manual weeding treatment; L-bam, low-volume ground bamboo treatment; M-bam, medium-volume ground bamboo treatment; H-bam, high-volume ground bamboo treatment

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