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

Table 7 Post-experiment soil chemical properties in the paddy field experiments conducted in 2018–2019

	Control	Manual	L-bam	M-bam	H-bam	df	F	P
2018
pH	6.48 ± 0.06	6.13 ± 0.03	6.30 ± 0.10	6.13 ± 0.17	6.13 ± 0.27	4, 11	1.26	0.344
Total inorganic nitrogen (mg kg⁻¹)	11.75 ± 0.63^a	14.33 ± 0.67^ab	12.33 ± 2.33^ab	18.00 ± 1.53^ab	19.00 ± 2.08^b	4, 11	4.80	0.017
Available phosphate (mg kg⁻¹)	85.00 ± 41.13	16.67 ± 12.02	86.67 ± 66.92	110.00 ± 68.07	126.67 ± 67.41	4, 11	0.58	0.682
Exchangeable potassium (mg kg⁻¹)	257.50 ± 31.19	226.67 ± 20.28	260.00 ± 47.26	320.00 ± 41.63	306.67 ± 42.56	4, 11	1.01	0.443
Available silicic acid (mg kg⁻¹)	436.25 ± 29.28	398.67 ± 23.10	494.00 ± 65.90	370.67 ± 30.75	314.67 ± 23.88	4, 11	3.16	0.059
2019
pH	6.15 ± 0.06	6.17 ± 0.09	6.07 ± 0.03	6.07 ± 0.07	5.90 ± 0.15	4, 11	1.43	0.289
Total inorganic nitrogen (mg kg⁻¹)	25.25 ± 6.46	19.67 ± 1.76	19.67 ± 4.70	35.33 ± 17.33	26.33 ± 1.86	4, 11	0.48	0.749
Available phosphate (mg kg⁻¹)	135.00 ± 22.17	96.67 ± 21.86	126.67 ± 31.80	153.33 ± 40.55	183.33 ± 63.33	4, 11	0.70	0.608
Exchangeable potassium (mg kg⁻¹)	120.00 ± 9.13	96.67 ± 3.33	120.00 ± 11.55	130.00 ± 10.00	123.33 ± 8.82	4, 11	1.79	0.201
Available silicic acid (mg kg⁻¹)	387.50 ± 37.06	343.33 ± 17.64	376.67 ± 3.33	356.67 ± 6.67	286.67 ± 27.28	4, 11	2.37	0.116

Values are means ± standard error. Summary statistics of generalized linear models are provided in the last three columns. Manual, manual weeding treatment; L-bam, low-volume ground bamboo application treatment; M-bam, medium-volume ground bamboo application treatment; H-bam, high-volume ground bamboo application treatment. Significant effects (P < 0.05) detected by generalized linear models are indicated by bold font. Different superscript letters indicate significant pairwise differences (α = 0.05) according to Bonferroni post-hoc tests

ISSN: 2662-4044