Contribution of legumes to the availability of soil nitrogen and its uptake by wheat in Mediterranean environments of central Chile
| Autor: | Iván Matus, Alejandro del Pozo, Soledad Espinoza, Carlos Ovalle, Erick Zagal |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Mediterranean climate
food.ingredient Soil nitrogen Triticum aestivum Pisum lcsh:Agriculture Green manure crop rotation Sativum food lupins oat lcsh:Environmental sciences lcsh:GE1-350 biology Phenology N uptake lcsh:S food and beverages Mineralization (soil science) biology.organism_classification Avena Agronomy field peas Alfisol Animal Science and Zoology Andisol vetch Agronomy and Crop Science |
| Zdroj: | Chilean journal of agricultural research, Volume: 75, Issue: 1, Pages: 111-121, Published: MAR 2015 Chilean Journal of Agricultural Research, Vol 75, Iss 1, Pp 111-121 (2015) Chilean journal of agricultural research v.75 n.1 2015 SciELO Chile CONICYT Chile instacron:CONICYT |
| ISSN: | 0718-5839 |
| Popis: | The absorption and partitioning of N is determined by its availability and demand during the various phenological stages of the crop. In two experiments conducted in rainfed areas of the Mediterranean climate region of central Chile, legume-wheat (Triticum aestivum L.) rotations were compared to oat (Avena sativa L.)-wheat systems (with and without applications of N fertilizer). The objective was to assess the contribution of legumes to the availability of soil N and N uptake by the wheat crop following grain legumes. N mineralization and uptake, N use efficiency (NUE), and N uptake efficiency (NUpE) by wheat were evaluated at different phenological stages in 2010. Synchronization existed between accumulated soil N mineralization and N uptake by the wheat. N uptake by wheat was higher in Experiment II (Andean foothill) than in Experiment I (interior dryland). Grain yields after legumes ranged 60-110% and 72-103% of yields in the fertilized cereal rotation (oat-wheat) in Experiments I and II, respectively. There was high correlation between soil N availability vs. grain yield (R² = 0.84 and 0.64) and N uptake vs. grain yield (R² = 0.55 and 0.64) for Experiments I and II, respectively. Rotations with lupine (Lupinus spp.) and field peas (Pisum sativum L.) showed high NUE and NUpE in Experiment I, and Experiment II in pea. The lowest NUE was after oats with N fertilizers. It is concluded that wheat cultivated in both agro-ecological areas after grain legumes or green manure was more efficient in N uptake and use than cereal, especially when the latter was fertilized. |
| Databáze: | OpenAIRE |
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