PJB-2024-446
PHYTOTOXIC EFFECTS OF SORGHUM (SORGHUM BICOLOR L.) AND NITROGEN MANAGEMENT ON WEED REDUCTION AND YIELD OF SESAME (SESAMUM INSICUM L.)
Mr. Muhammad Saleem Chang
Abstract
Abstract
The current research study was conducted at Crop Sciences Research Institute (CSRI), Agriculture Research Centre, Tandojam. The consecutive study was assumed to assess the allelopathic effects of sorghum and nitrogen application strategies on suppression of weed and yield of the sesame crop. The field experiment was randomized complete block design (RCBD) factorial in three replication with net plot size of 5 m x 4 m (20 m2). The experimental unit was accommodated with three factors i.e. weed control practices (control or untreated, sorghum extract @ 40 L ha-1, herbicide @ 1.0 L ha-1, sorghum extract @ 20 L ha-1 + herbicide @ 0.5 L ha-1, and hand weeding twice (30 and 55 days after sowing)), nitrogen application rates (50 kg ha-1, 75 kg-1 and 100 kg ha-1) and nitrogen application timings (two splits and three splits). The statistical analysis of the collected data indicated that a substantial (P<0.05) effects of weed control practices, nitrogen application approaches and their interaction on weed reduction positively improved agronomic and qualitative traits of sesame than control (untreated). Considerably, the findings of overall study revealed that sorghum extract @ 20 L ha-1 + Herbicide (AXIAL 330 ml +ally max 14 g) @ 0.5 L ha-1 integrated with nitrogen application rate (100 kg ha-1), nitrogen application timings (three splits) and their interaction exerted considerable inhibitory effects on weed observations, significantly enhanced the agronomic and qualitative traits of sesame crop under field conditions, followed by hand weeding twice (30 and 55 days after sowing) ranked 2nd in effectiveness. The findings of this study thus conferred that possible efforts must be taken to reduce the dose of herbicides and minimize the health hazards.
Keywords: Phytotoxic, Nitrogen management, Herbicide, Hand weeding, Sesame, Extract
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