Impact of nitrogen fertilizer type and application rate on growth, nitrate accumulation, and postharvest quality of spinach.
Autor: | Gülüt KY; Department of Soil Science and Plant Nutrition/Faculty of Agriculture, Çukurova University, Sarıçam, Adana, Turkey., Şentürk GG; Department of Soil Science and Plant Nutrition/Faculty of Agriculture, Çukurova University, Sarıçam, Adana, Turkey. |
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Jazyk: | angličtina |
Zdroj: | PeerJ [PeerJ] 2024 Jul 12; Vol. 12, pp. e17726. Date of Electronic Publication: 2024 Jul 12 (Print Publication: 2024). |
DOI: | 10.7717/peerj.17726 |
Abstrakt: | Background: A balanced supply of nitrogen is essential for spinach, supporting both optimal growth and appropriate nitrate (NO Methods: Four fertilizer types were applied at five N doses (25, 50, 200, and 400 mg N kg -1 ) to plants grown in plastic pots at a greenhouse. The fertilizer types used in the experiment were ammonium sulphate (AS), slow-release ammonium sulphate (SRAS), calcium nitrate (CN), and yeast residue (YR). Spinach parameters like Soil Plant Analysis Development (SPAD) values (chlorophyll content), plant height, and fresh weight were measured. Nitrate content in leaves was analyzed after storage periods simulating post-harvest handling (0, 5, and 10 days). Results: The application of nitrogen fertilizer significantly influenced spinach growth parameters and nitrate content. The YRx400 treatment yielded the largest leaves (10.3 ± 0.5 cm long, 5.3 ± 0.2 cm wide). SPAD values increased with higher N doses for AS, SRAS, and CN fertilizers, with AS×400 (58.1 ± 0.8) and SRAS×400 (62.0 ± 5.8) reaching the highest values. YR treatments showed a moderate SPAD increase. Fresh weight response depended on fertilizer type, N dose, and storage period. While fresh weight increased in all fertilizers till 200 mg kg -1 dose, a decrease was observed at the highest dose for AS and CN. SRAS exhibited a more gradual increase in fresh weight with increasing nitrogen dose, without the negative impact seen at the highest dose in AS and CN. Nitrate content in spinach leaves varied by fertilizer type, dose, and storage day. CNx400 resulted in the highest NO Conclusion: For rapid early growth and potentially higher yields, AS may be suitable at moderate doses (200 mg kg -1 ). SRAS offers a more balanced approach, promoting sustained growth while potentially reducing NO Competing Interests: The authors declare that they have no competing interests. (© 2024 Gülüt and Şentürk.) |
Databáze: | MEDLINE |
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