Potato Yield Response and Seasonal Nitrate Leaching as Influenced by Nitrogen Management
Nitrate leaching is of great environmental concern, particularly with potatoes grown on sandy soils. This 3-year study evaluated the effect of three N rates (100, 150, and 200 kg ha<sup>−1</sup>) of single applications of polymer-coated urea (PCU) and a 75% PCU + 25% urea mixture, plus a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/10/2055 |
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| author | Chedzer-Clarc Clément Athyna N. Cambouris Noura Ziadi Bernie J. Zebarth Antoine Karam |
| author_facet | Chedzer-Clarc Clément Athyna N. Cambouris Noura Ziadi Bernie J. Zebarth Antoine Karam |
| author_sort | Chedzer-Clarc Clément |
| collection | DOAJ |
| description | Nitrate leaching is of great environmental concern, particularly with potatoes grown on sandy soils. This 3-year study evaluated the effect of three N rates (100, 150, and 200 kg ha<sup>−1</sup>) of single applications of polymer-coated urea (PCU) and a 75% PCU + 25% urea mixture, plus a conventional split application of 200 kg N ha<sup>−1</sup> of a 50% ammonium sulfate + 50% calcium ammonium nitrate mixture (CONV) on NO<sub>3</sub><sup>−</sup>-N leaching, potato yield, and N uptake under irrigated and non-irrigated conditions on a sandy soil in Quebec (Canada). Fertilizer N application increased growing season NO<sub>3</sub><sup>−</sup>-N leaching only under irrigation. On average, irrigation increased seasonal NO<sub>3</sub><sup>−</sup>-N leaching by 52%. Under irrigated conditions, PCU reduced NO<sub>3</sub><sup>−</sup>-N leaching compared to PCU + urea. However, both PCU and PCU + urea significantly increased NO<sub>3</sub><sup>−</sup>-N leaching compared to the CONV at the equivalent N rate of 200 kg N ha<sup>−1</sup>. This was attributed to the timing of soil N availability and deep-water percolation. Total (TY) and marketable (MY) yields in the CONV were similar to those in the PCU applied at the equivalent N rate of 200 kg N ha<sup>−1</sup>. Despite lower plant N uptake, PCU resulted in greater TY and MY compared to PCU + urea. Residual soil inorganic N was greater for PCU and PCU + urea compared to the CONV, providing evidence that PCU products have the potential to increase NO<sub>3</sub><sup>−</sup>-N leaching after the growing season. In this study, PCU was an agronomically and environmentally better choice than PCU + urea. The results also showed that the efficiency of PCU to reduce seasonal NO<sub>3</sub><sup>−</sup>-N leaching may vary according to the timing of precipitation and irrigation. |
| first_indexed | 2024-03-10T06:47:15Z |
| format | Article |
| id | doaj.art-612dee45bf9f4d7f85afeacf99333420 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T06:47:15Z |
| publishDate | 2021-10-01 |
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| series | Agronomy |
| spelling | doaj.art-612dee45bf9f4d7f85afeacf993334202023-11-22T17:07:34ZengMDPI AGAgronomy2073-43952021-10-011110205510.3390/agronomy11102055Potato Yield Response and Seasonal Nitrate Leaching as Influenced by Nitrogen ManagementChedzer-Clarc Clément0Athyna N. Cambouris1Noura Ziadi2Bernie J. Zebarth3Antoine Karam4Agriculture and Agri-Food Canada, Quebec Research and Development Centre, 2560 Hochelaga Boulevard, Quebec City, QC G1V 2J3, CanadaAgriculture and Agri-Food Canada, Quebec Research and Development Centre, 2560 Hochelaga Boulevard, Quebec City, QC G1V 2J3, CanadaAgriculture and Agri-Food Canada, Quebec Research and Development Centre, 2560 Hochelaga Boulevard, Quebec City, QC G1V 2J3, CanadaAgriculture and Agri-Food Canada, Fredericton Research and Development Centre, P.O. Box 20280, Fredericton, NB E3B 4Z7, CanadaDepartment of Soils and Agri-Food Engineering, Paul Comtois Bldg., Université Laval, Quebec City, QC G1V 0A6, CanadaNitrate leaching is of great environmental concern, particularly with potatoes grown on sandy soils. This 3-year study evaluated the effect of three N rates (100, 150, and 200 kg ha<sup>−1</sup>) of single applications of polymer-coated urea (PCU) and a 75% PCU + 25% urea mixture, plus a conventional split application of 200 kg N ha<sup>−1</sup> of a 50% ammonium sulfate + 50% calcium ammonium nitrate mixture (CONV) on NO<sub>3</sub><sup>−</sup>-N leaching, potato yield, and N uptake under irrigated and non-irrigated conditions on a sandy soil in Quebec (Canada). Fertilizer N application increased growing season NO<sub>3</sub><sup>−</sup>-N leaching only under irrigation. On average, irrigation increased seasonal NO<sub>3</sub><sup>−</sup>-N leaching by 52%. Under irrigated conditions, PCU reduced NO<sub>3</sub><sup>−</sup>-N leaching compared to PCU + urea. However, both PCU and PCU + urea significantly increased NO<sub>3</sub><sup>−</sup>-N leaching compared to the CONV at the equivalent N rate of 200 kg N ha<sup>−1</sup>. This was attributed to the timing of soil N availability and deep-water percolation. Total (TY) and marketable (MY) yields in the CONV were similar to those in the PCU applied at the equivalent N rate of 200 kg N ha<sup>−1</sup>. Despite lower plant N uptake, PCU resulted in greater TY and MY compared to PCU + urea. Residual soil inorganic N was greater for PCU and PCU + urea compared to the CONV, providing evidence that PCU products have the potential to increase NO<sub>3</sub><sup>−</sup>-N leaching after the growing season. In this study, PCU was an agronomically and environmentally better choice than PCU + urea. The results also showed that the efficiency of PCU to reduce seasonal NO<sub>3</sub><sup>−</sup>-N leaching may vary according to the timing of precipitation and irrigation.https://www.mdpi.com/2073-4395/11/10/2055polymer-coated ureairrigationsuction lysimeterHydrus-1Dresidual soil nitrogen |
| spellingShingle | Chedzer-Clarc Clément Athyna N. Cambouris Noura Ziadi Bernie J. Zebarth Antoine Karam Potato Yield Response and Seasonal Nitrate Leaching as Influenced by Nitrogen Management Agronomy polymer-coated urea irrigation suction lysimeter Hydrus-1D residual soil nitrogen |
| title | Potato Yield Response and Seasonal Nitrate Leaching as Influenced by Nitrogen Management |
| title_full | Potato Yield Response and Seasonal Nitrate Leaching as Influenced by Nitrogen Management |
| title_fullStr | Potato Yield Response and Seasonal Nitrate Leaching as Influenced by Nitrogen Management |
| title_full_unstemmed | Potato Yield Response and Seasonal Nitrate Leaching as Influenced by Nitrogen Management |
| title_short | Potato Yield Response and Seasonal Nitrate Leaching as Influenced by Nitrogen Management |
| title_sort | potato yield response and seasonal nitrate leaching as influenced by nitrogen management |
| topic | polymer-coated urea irrigation suction lysimeter Hydrus-1D residual soil nitrogen |
| url | https://www.mdpi.com/2073-4395/11/10/2055 |
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