The nitrogen nutrition of yam (Dioscorea spp)
| Autor: | Astrid Oberson, K V Hgaza, Innocent Delwende Kiba, Emmanel Frossard, Séverin Ake, Lucien Diby |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
biology Physiology fungi Dioscorea alata chemistry.chemical_element food and beverages 04 agricultural and veterinary sciences biology.organism_classification 01 natural sciences Nitrogen Horticulture chemistry Dioscorea rotundata 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Dioscorea Agronomy and Crop Science 010606 plant biology & botany |
| DOI: | 10.6084/m9.figshare.9785333.v1 |
| Popis: | Information on the nitrogen (N) nutrition of yam (Dioscorea spp) is limited. Our objective was to elucidate the factors controlling N uptake by D. rotundata and D. alata. We analyzed results obtained with improved cultivars of these species grown in three field experiments among which 15N-fertilizer was used in one. Plant biomass production, leaf area index (LAI), root length density, N and 15N uptake by the plant were measured in these experiments. Nitrogen uptake was controlled in both species by plant demand and N inputs. A positive relation was observed between N uptake and LAI. Despite the small root system, the ability of the plant to take N up was high. The amount of N derived from the fertilizer recovered in the plant was explained by total N uptake. Finally, avenues to improve the low nitrogen fertilizer recovery ( |
| Databáze: | OpenAIRE |
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