Nitrogen sulfur interaction on fertiliser - use efficiency in bread wheat genotypes from the Argentine Pampas
Wheat crop response to sulfur (S) depends on nitrogen (N) level, genotype and environmental conditions, demonstrating strong genotype environment nutrients interactions. The agronomic - use efficiency of both nutrients has not been evaluated in a wide range of modern genotypes differing in their cyc...
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| Otros Autores: | , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Materias: | |
| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2017arata2.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| Sumario: | Wheat crop response to sulfur (S) depends on nitrogen (N) level, genotype and environmental conditions, demonstrating strong genotype environment nutrients interactions. The agronomic - use efficiency of both nutrients has not been evaluated in a wide range of modern genotypes differing in their cycle length and baking quality. The aim of this study was to analyse the effect ofNand S fertilisation on yield components and use efficiency of both nutrients in 24 modern, high - yielding bread wheat genotypes (including long and short crop cycles) grown in contrasting environments in the Humid Pampa of Argentina. Two experiments were conducted under contrasting seasonal conditions on a Mollisol in Azul, Buenos Aires. Significant effects ofN(range 15–200 kgNha–1) on grain yield were observed in all genotypes. By contrast, responsesç to S (30–100 kg S ha–1) were found only at high N level in low soil-fertility environments, differing between long and short cycles. Genotype fertilisation interaction was significant in the environment with higher soil fertility. Sulfur addition improved N-recovery efficiency (0.15 v. 0.32) and agronomic efficiency of the availableN(84 v. 93 g g–1) in the poor-fertility environment, characterised by their Nand Sdeficiency and moderate level of organic matter. Grain N-recovery efficiency was largely explained by increases in grain number, whereas S recovery was also associated with increases in grain nutrient concentration. We conclude that genotype and environment strongly alter fertiliser-use efficiency, providing valuable information for ranking genotypes and optimising site - specific management of wheat crops in the Humid Pampa of Argentina. Grain S percentage may be useful as a physiological marker for selection of bread wheat genotypes with high apparent S recovery. |
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| ISSN: | 1836-0947 |