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Investigation of dry matter remobilization and current photosynthesis of rapeseed (Brassica napus L.) under nitrogen levels, planting and tillage methods as a second crop after rice
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Mohammad Rabiee *   , Sajjad Shaker-Kouhi |
| Rice Research Institute |
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Abstract: (329 Views) |
| In order to investigate the effects of nitrogen levels, planting and tillage methods on the dry matter remobilization and current photosynthesis in rapeseed (Brassica napus L.) in paddy field conditions, a split factorial experiment in complete randomized block design was conducted with three replications at research fields of Rice Research Institute of Iran in Rasht during two cropping seasons of 2016-2018. In this experiment, three tillage systems (conventional tillage, minimum tillage and no-tillage) were considered as main plots and two planting methods (direct and transplanting) and four rates of nitrogen (N) fertilizer from urea source (0, 100, 200 and 300 kg.ha-1) as factorial arrangement in subplots. The results showed that the second year of the experiment had the maximum dry matter remobilization (583.96 g.m-2), current photosynthesis (2764.68 g.m-2) and grain yield (3348.6 Kg.ha-1). The dry matter remobilization, remobilization efficiency, share of remobilization and grain yield for the transplanting method was higher than the direct seeding method. Among the N levels, the treatments of 200 and 300 kg.ha-1 had the highest dry matter remobilization, current photosynthesis and grain yield. Based on the results of this experiment, minimum tillage system with 200 kg.ha-1 of N in transplanting method can increase dry matter remobilization, current photosynthesis and grain yield of rapeseed in paddy fields of Guilan province. |
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| Keywords: No-tillage, Rice, Direct seeding, Transplanting and Minimum tillage |
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Full-Text [PDF 617 kb]
(254 Downloads)
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Type of Study: Research |
Subject:
Crop Improvment
Received: 2024/11/19 | Accepted: 2024/11/30 | Published: 2024/11/30
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