Artículos de revistas
Nitrogen×sulfur interaction on fertiliser-use efficiency in bread wheat genotypes from the Argentine Pampas
Arata, Agustin Francisco; Lerner, Silvia Beatriz; Tranquilli, Gabriela Edith; Arrigoni, Adriana C.; Rondanini, Deborah Paola; Nitrogen×sulfur interaction on fertiliser-use efficiency in bread wheat genotypes from the Argentine Pampas; CSIRO; Crop and Pasture Science; 68; 3; 3-2017; 202-212
Arata, Agustin Francisco
Lerner, Silvia Beatriz
Tranquilli, Gabriela Edith
Arrigoni, Adriana C.
Rondanini, Deborah Paola
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 of N and 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 of N (range 15-200kgNha-1) on grain yield were observed in all genotypes. By contrast, responses to S (30-100kgSha-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 available N (84 v. 93gg-1) in the poor-fertility environment, characterised by their N and S deficiency 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.