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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Central del Ecuador
2020
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| Online Access: | https://www.redalyc.org/articulo.oa?id=653869547006 https://www.redalyc.org/journal/6538/653869547006/ https://www.redalyc.org/journal/6538/653869547006/html/ https://www.redalyc.org/journal/6538/653869547006/653869547006.epub https://www.redalyc.org/journal/6538/653869547006/movil https://doi.org/10.29166/siembra.v7i2.2235 |
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Table of Contents:
- Partition of biomass and nitrogen in a potato crop under three nitrogen fertilization treatments Pedro Manuel Villa Lina Sarmiento Fermín Rada Alice Cristina Rodrigue Nelson Márquez Wilmer Espinosa Agrociencias tuber yield Solanum tuberosum nitrogen accumulation Dry weight accumulation Potato yield is strongly dependent on nitrogen fertilization, thus understanding the crop ecophysiological response is essential to improve the management of the agro-ecological resources. However, studies on biomass and nitrogen partitioning under different nitrogen fertilization are still limited for potato cultivars of the tropical Andes of Venezuela. The aim of this study was to determine the effects of nitrogen fertilization on patterns of biomass and nitrogen partitioning during the main phenologycal stages of cultivar Granola in Mérida, State of Mérida, Venezuela. The fertilization treatments (partitioning) were: Control treatment (0-N), 133 kg N ha -1 (133-N), and 400 kg N ha -1 (400-N). Experimental plots were set up in a randomized blocks design with three replications. Biomass and nitrogen levels were measured for each organ of the plant during the main phenological stages of the crop. The tuber yield performance and the total biomass were strongly influenced by nitrogen availability and the assimilatory biomass. Total biomass production as well as biomass and nitrogen partitioning to each plant organ followed the sequence fertilization rates: 400-N > 133-N > 0-N. However, biomass and nitrogen partitioning to the roots and stolons was higher in the treatment with limited nitrogen levels. Proportional changes among aboveground and belowground biomass are adaptive responses to nitrogen deficit; which in turn, are determining factors in crop production. 2020 artículo científico 1390-8928 https://www.redalyc.org/articulo.oa?id=653869547006 https://www.redalyc.org/journal/6538/653869547006/ https://www.redalyc.org/journal/6538/653869547006/html/ https://www.redalyc.org/journal/6538/653869547006/653869547006.epub https://www.redalyc.org/journal/6538/653869547006/movil https://doi.org/10.29166/siembra.v7i2.2235 en http://www.redalyc.org/revista.oa?id=6538 Siembra application/pdf Universidad Central del Ecuador Siembra (Ecuador) Num.2 Vol.7