Fig. 1
Effect on weed and rice yield after long-term application of BIO. A: BIO dosage effect on weed control in 2017; B: BIO dosage effect on weed control in 2021. C: BIO dosage effect on rice yield in 2017; D: BIO dosage effect on rice yield in 2021. BIO-50: 750 kg/hm2 BIO-treated; BIO-100: 1500 kg/hm2 BIO-treated; BIO-200: 3000 kg/hm2 BIO-treated; BIO-400: 6000 kg/hm2 BIO-treated; BIO-800: 12,000 kg/hm2 BIO-treated;NEF: weed number control effect (%) (plants/m2); WEF: weed fresh weight control effect (%) (g/m2). Data analysis is based on the average of nine repetitions. Means with the same letter are not significantly different according to Fisher’s protected LSD test (a = 0.05)