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CC BY-NC-ND V4.0, Open Access
Journal article
Early sowing increases nitrogen use efficiency of sunflower in wet clay soils
Agronomy journal, Vol.115(4), pp.1992-2006
2023
Appears in Open Access via Read & Publish Agreements
Abstract
Early sowing increases yield potential of sunflower on wet, saline clay soils but the effects on nitrogen (N) requirements have not been determined. In a 2-year study on a drainable field with wet, saline clay soils in southwestern coastal Bangladesh, we investigated nitrogen use efficiency (NUE) and yield responses to N rates (0, 60, 90, 120, 150, 180 and 210 kg ha(-1)) for zero-till sunflower cv. Hysun-33 sown from November 30 (early) to December 30 (late). Early sowing produced highest seed yield (3.59 ton ha(-1)) and oil yield (1400 kg ha(-1)) at 150 kg N ha(-1). Delayed sowing (December 15-December 30) reduced seed and oil yields by 4%-15% and 7%-18%, respectively. In late sowing, crops suffered from multiple stresses (soil-water deficit, salinity, and heat), which decreased yields. The N fertilizer requirement in late sowing was higher (180 kg ha(-1)) to achieve maximum yield, yet the yield was lower than from earlier sowing. Compared with nil N supply, the rates of 60-150 kg N ha(-1) increased seed and oil yields of the early-sown sunflower by 1.3-3.3 times and 1.2-2.9 times, respectively, whereas the rates of 180-210 kg N ha(-1) decreased seed and oil yields by 2%-5% and 7%-14%, respectively. Higher net profit (US$764) was also achieved from earlier sowing with 150 kg N ha(-1). We conclude that under wet and saline clay soils, higher sunflower yield in early sowing is attributable to lower stress that increased NUE and decreased N requirement.
Details
- Title
- Early sowing increases nitrogen use efficiency of sunflower in wet clay soils
- Authors/Creators
- Bidhan Chandro Sarker - Khulna UniversityMd. Enamul Kabir - Khulna UniversityRichard W. Bell - Murdoch University, Centre for Sustainable Farming SystemsMd. Yasin Ali - Khulna University
- Publication Details
- Agronomy journal, Vol.115(4), pp.1992-2006
- Publisher
- Wiley Periodicals LLC on behalf of American Society of Agronomy.
- Number of pages
- 15
- Grant note
- LWR/2016/136 / Australian Centre for International Agricultural Research Kishi Gobeshona Foundation
- Identifiers
- 991005602259507891
- Copyright
- © 2023 The Authors.
- Murdoch Affiliation
- Centre for Sustainable Farming Systems
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.4 Crop Science
- 3.4.424 Crop Yield Optimization
- Web Of Science research areas
- Agronomy
- ESI research areas
- Agricultural Sciences