Late Foliar Diseases in Wheat Crops Decrease Nitrogen Yield Through N Uptake Rather than Through Variations in N Remobilization
| العنوان: | Late Foliar Diseases in Wheat Crops Decrease Nitrogen Yield Through N Uptake Rather than Through Variations in N Remobilization |
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| المؤلفون: | Marie-Odile Bancal, Pierre Bancal, Romain Roche |
| المساهمون: | Environnement et Grandes Cultures (EGC), AgroParisTech-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-AgroParisTech |
| المصدر: | Annals of Botany Annals of Botany, Oxford University Press (OUP), 2008, 102 (4), pp.579-590. ⟨10.1093/aob/mcn124⟩ |
| بيانات النشر: | Oxford University Press (OUP), 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | Crops, Agricultural, 0106 biological sciences, Nitrogen, Field experiment, MYCOSPHAERELLA GRAMINICOLA, SEPTORIA TRITICI BLOTCH, Plant Science, Biology, TRITICUM AESTIVUM, LEAF AREA DURATION, 01 natural sciences, Rust, Crop, Soil, Septoria, N UPTAKE, Yield (wine), Biomass, Fertilizers, Triticum, Plant Diseases, 2. Zero hunger, Analysis of Variance, SEPTORIA TRITICI, Biomass (ecology), fungi, Fungi, food and beverages, N YIELD, Original Articles, 04 agricultural and veterinary sciences, ECOPHYSIOLOGIE, [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics, biology.organism_classification, Fungicides, Industrial, Plant Leaves, RENDEMENT EN AZOTE, Fungicide, Agronomy, Mycosphaerella graminicola, Linear Models, ABSORPTION D'AZOTE, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, LEAF RUST, N REMOBILIZATION, INDICE FOLIAIRE, PUCCINIA TRITICINA, 010606 plant biology & botany |
| الوصف: | Background and Aims French wheat grains may be of little value on world markets because they have low and highly variable grain protein concentrations (GPC). This nitrogen-yield to yield ratio depends on crop nitrogen (N) fertilization as well as on crop capacity to use N, which is known to vary with climate and disease severity. Here an examination is made of the respective roles that N remobilization and post-anthesis N uptake play in N yield variations; in particular, when wheat crops (Triticum aestivum) are affected by leaf rust (Puccinia triticina) and Septoria tritici blotch (teleomorph Mycosphaerella graminicola). Methods Data from a 4-year field experiment was used to analyse N yield variations in wheat crops grown either with a third or no late N fertilization. Natural aerial epidemics ensured a range of disease severity, and fungicide ensured disease-free control plots. The data set of Gooding et al. (2005, Journal of Agricultural Science 143: 503-518) was incorporated in order to enlarge the range of conditions. Key Results Post-anthesis N uptake accounted for a third of N yield whilst N remobilization accounted for two-thirds in all crops whether affected by diseases or not. However, variations in N yield were highly correlated with post-anthesis N uptake, more than with N remobilization, in diseased and also healthy crops. Furthermore, N remobilization did not significantly correlate with N yield in healthy crops. These findings matched data from studies using various wheat genotypes under various management and climatic conditions. Leaf area duration ( LAD) accurately predicted N remobilization whether or not crops were diseased; in diseased crops, LAD also accurately predicted N uptake. Conclusions Under the experimental conditions, N yield variations were closely associated with post-anthesis N uptake in diseased but also in healthy crops. Understanding the respective roles of N uptake and N remobilization in the case of diseased and healthy crops holds the promise of better modelling of variations in N yield, and thus in GPC. |
| تدمد: | 1095-8290 0305-7364 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f8c66027ca4b08d1dd2c38b3ffc93ecTest https://doi.org/10.1093/aob/mcn124Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....4f8c66027ca4b08d1dd2c38b3ffc93ec |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10958290 03057364 |
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