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- Title
Effects of Potato Cultivar on the Components of Nitrogen Use Efficiency.
- Authors
Cohan, J. P.; Hannon, C.; Houilliez, B.; Gravoueille, J. M.; Geille, A.; Lampaert, E.; Laurent, F.
- Abstract
Maximising potato nitrogen use efficiency (NUE) is necessary to combine high yields, market requirements, high economic income and low environmental impact. A 5-year study was conducted to assess the cultivar effect on NUE components in France. Seven trials were carried out in the Beauce, Picardie and Nord-Pas de Calais regions. The protocol combined two factors: cultivar (‘Agata’, ‘Bintje’, ‘Innovator’, ‘Lady Claire’ and ‘Spirit’) and nitrogen application along a complete response curve (six to seven rates). Total tuber yield, 50 mm tuber yield and nitrogen uptake at haulm killing were measured. We demonstrate that the potato cultivar has a clear effect on NUE components. This effect is supported both by nitrogen uptake efficiency (NupE) and by nitrogen utilisation efficiency (NutE). It implies that the potato cultivars tested generate different nitrogen requirements per yield unit to reach the optimum yield. The way to characterise these differences for all cultivars available in registration trials must be considered before taking into account a cultivar effect on NUE in nitrogen recommendations for farmers.
- Subjects
POTATOES; CULTIVARS; NITROGEN fertilizers; POTATO yields; EFFECT of nitrates on plants
- Publication
Potato Research, 2018, Vol 61, Issue 3, p231
- ISSN
0014-3065
- Publication type
Article
- DOI
10.1007/s11540-018-9371-6