Contribution of legumes to the availability of soil nitrogen and its uptake by wheat in Mediterranean environments of central Chile
作者： Soledad Espinoza , Carlos Ovalle , Erick Zagal , Iván Matus , Alejandro del Pozo
DOI: 10.4067/S0718-58392015000100016
关键词: Sativum 、 Agronomy 、 Green manure 、 Biology 、 Soil nitrogen 、 Mediterranean climate 、 Avena 、 Phenology 、 Mineralization (soil science) 、 Pisum
摘要: The absorption and partitioning of N is determined by its availability demand during the various phenological stages crop. In two experiments conducted in rainfed areas Mediterranean climate region central Chile, legume-wheat (Triticum aestivum L.) rotations were compared to oat (Avena sativa L.)-wheat systems (with without applications fertilizer). objective was assess contribution legumes soil uptake wheat crop following grain legumes. mineralization uptake, use efficiency (NUE), (NUpE) evaluated at different 2010. Synchronization existed between accumulated wheat. higher Experiment II (Andean foothill) than I (interior dryland). Grain yields after ranged 60-110% 72-103% fertilized cereal rotation (oat-wheat) Experiments II, respectively. There high correlation vs. yield (R2 = 0.84 0.64) 0.55 for Rotations with lupine (Lupinus spp.) field peas (Pisum sativum showed NUE NUpE I, pea. lowest oats fertilizers. It concluded that cultivated both agro-ecological or green manure more efficient cereal, especially when latter fertilized.
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