Evaluation of energy indicators of rapeseed (Brassica napus L.) cultivation in paddy fields influenced by tillage systems, planting method and nitrogen amounts

Articles in Press

Document Type : Research Paper

Authors

Rice Research Institute of Iran, Rasht

10.22034/saps.2025.64021.3296

Abstract

Background and Objective: The present study was performed to evaluate the effects of tillage, planting method and nitrogen (N) amounts on the energy indicators of rapeseed (Brassica napus L.) production in paddy fields.
Materials and Methods: The experiment was designed as a split factorial arrangement based on a randomized complete block design with three replications at research field of Rice Research Institute of Iran in Rasht during two cropping seasons of 2016-2018. The conventional tillage, minimum tillage, and no-tillage methods were considered as the main plots and two planting methods of direct seeding and transplanting, and the amounts of 0, 100, 200, and 300 kg.ha-1 of pure N as factorial in subplots.
Results: The results showed that in most treatments, the N fertilizer and diesel fuel showed higher share percentages in rapeseed production than the other energy inputs. The treatments that did not use N fertilizer had the lowest net energy due to their low grain yield. This emphasizes the importance of using an optimal level of N fertilizer to successfully produce rapeseed. The treatments of conventional tillage with 300 kg.ha-1 of N in both planting methods had the highest energy input (>38000 MJ.ha-1) due to more consumption of diesel fuel and nitrogen.
Conclusion: The treatment combination of minimum tillage at 100 kg.ha-1 of N in both planting methods due to high energy consumption efficiencies, as sustainable options could be recommended for rapeseed cultivation after rice harvesting in paddy fields of Guilan province.

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Journal of Agricultural Science and Sustainable Production

Articles in Press, Accepted Manuscript
Available Online from 23 October 2026

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