Year: 2025
Type: article
Abstract: Efficient nitrogen (N) fertilizer management is pivotal for enhancing agronomic indices while ensuring sustainable agricultural practices. This study explored the effects of different nitrogen levels (0, 75, 150, 225, and 300 kg N ha-1), application ratios 5:5 (50% + 50%) and 6:4 (60 + 40%) and timing (jointing, flowering, and grain filling stages) on agronomic parameters of winter wheat. The results revealed that the 225 kg N ha-1treatment at a 6:4 ratio performed significantlybetter than other treatments across growth parameters. At this optimal rate and ratio, plant height, aboveground dry biomass (AGDB), leaf dry weight, and stem dry weight were significantly higher compared to lower (75 kg N ha-1) or excessive (300 kg N ha-1) applications. Plant height exhibited an increasing setup up to 27.30% at jointing, 24.34% at flowering, and 33.13% at grain filling under 225 kg N ha-¹at 6:4. Aboveground biomass followed a similar trend, achieving a 66.90% increase at jointing under 225 kg N ha-1, while leaf and stem dry weights reflected the vigorous contribution of nitrogen rates and ratios, particularly at jointing and flowering stages. Leaf area dynamics and leaf area index (LAI) further validated these findings, peaking at the flowering stage for 225 kg N ha-1at 6:4. The results emphasize the importance of optimizing N fertilizer rates, ratios, and application timing to improve crop growth dynamics and productivity. The results provide appropriate evidence for sustainable nitrogen management, application of nitrogen at 225 kg N ha-1and a 6:4 ratio as an effective approach to maximize agronomic performance inwinter wheat while mitigating environmental impacts. These results contribute novel perspectives to nitrogen use efficiency and influence practical recommendations for precision agriculture.
Authors: Muhammad Saleem Kubar, Kashif Ali Kubar, Mehar un-Nisa Narejo, Shafique Ahmed Memon, Abdul Hafeez Mastoi, Habib Rehman Lakho, Bakhtyar Ahmed, Abdul Wahab, Zohaib Ahmed Memon
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W7083583521
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