Impact of pre and post emergent herbicides on nutrient uptake and quality of direct seeded rice

Abstract

A field experiment was conducted at SKUAST-Jammu during the Kharif season of 2020 in direct-seeded rice (DSR) to evaluate the performance of pre- and post-emergence herbicides on weed control, nutrient uptake by rice and weeds, and grain quality. The pre-emergence application of pretilachlor + pyrazosulfuron ethyl (615 g/ha) combined with post-emergence application of triafamone + ethoxysulfuron (66.5 g/ha at 25 DAS) resulted in the highest uptake of nitrogen, phosphorus, and potassium by rice, while minimizing nutrient removal by weeds. The highest protein and amylose contents were also recorded under these treatments. The findings suggest the effectiveness of integrated herbicide application for better nutrient use efficiency and improved grain quality.