Yield of Short Duration Drought Tolerant Transplant Aman Rice Varieties as Influenced by Integrated Nitrogen and Weed Management Practices

Rice productivity varies substantially across rice varieties along with judicious nitrogenous fertilizer and weed management (WM) practices. At AFL, Bangladesh Agricultural University, we tested two cultivars of short‐duration drought‐tolerant T. aman (autumn) rice, Bangladesh Rice Research Institute (BRRI) dhan66 and BRRI dhan71, and how different integrated nutrient management (INM) and WM approaches influenced the yields of each. In NM, there were three approaches: N0 (no N); N sourced from PM:PU (50:50) [N1, 50NPMPU]; and N sourced from USG [100NUSG]. In WM, there were also three methods: no weeding (W0); herbicide (pre‐emergence type) [W1, WPP]; and hand weedings [W2, W2H]. Out of 14 infested weed species from eight families, Panikachu ( Monochoria vaginalis ) and Shama ( Echinochloa crusgalli ) were the most dominant. Weed density (WD) was highest in BRRI dhan66, which did not get any nitrogenous fertilizer at control, and lowest in BRRI dhan71, which had two manual weedings and N from USG. In addition, BRRI dhan66 was treated with Pretilachlor and USG‐sourced N exhibited the maximum (t ha −1 ) grain yield (GY) (5.54). In summary, using BRRI dhan66 rice with WPP and 100NUSG can effectively control weeds and increase the GY of short‐duration drought tolerant rice.