Published

2017-05-01

Leaf area index of potato (Solanum tuberosum L.) crop under three nitrogen fertilization treatments

Índice de área foliar del cultivo de papa (Solanum tuberosum L.) bajo tres tratamientos de fertilización nitrogenada

DOI:

https://doi.org/10.15446/agron.colomb.v35n2.62110

Keywords:

plant canopy analyzer, leaf area, granola variety, Solanaceae (en)
analizador de dosel, área foliar, variedad granola, Solanaceae (es)

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Authors

  • Pedro Manuel Villa Universidade Federal de Viçosa (UFV) https://orcid.org/0000-0003-4826-3187
  • Lina Sarmiento Universidad de los Andes (ULA)
  • Fermín José Rada Universidad de los Andes (ULA)
  • Daniel Machado Universidad de los Andes (ULA)
  • Alice Cristina Rodrigues Universidade Federal de Viçosa (UFV)
Nitrogen fertilization has considerable effects on growth and yield of potato crop. Leaf expansion is one of the most important growth parameters that can be used to optimize nitrogen fertilization management in agroecological practices. We evaluated the effect of nitrogen fertilization on the leaf area index (LAI) of potato crop during different phenological stages by two different methods. Experimental plots were established in a randomized block design with the following treatments: no nitrogen supply (0-N), 133 kg N ha-1 (133-N), and 400 kg N ha-1 (400-N), using the Granola variety, at the Andes region, Merida city, Venezuela. We measured leaf area at the main phenological stages of the crop using a plant canopy analyzer. LAI showed significant differences among treatments and phenological stages, except during the emergence stage. The maximum LAI values were obtained 55 days after emergence: 400-N (1.42±0.16) > 133-N (0.92±0.21) > 0-N (0.34±0.08). Nitrogen fertilization had a significant effect on the development of LAI in potato crop along its different phenological stages.
La nutrición con nitrógeno tiene efectos considerables sobre la dinámica de crecimiento y producción del cultivo de papa, siendo el desarrollo del área foliar uno de los parámetros de crecimiento más importantes para optimizar el manejo de recursos agroecológicos. Se evaluó el efecto de la nutrición de nitrógeno sobre el índice de área foliar (IAF) a través de dos métodos durante diferentes fases fenológicas del cultivo. Se establecieron parcelas experimentales bajo un diseño de bloques al azar, con tres replicas por tratamiento de fertilización; sin nitrógeno (0-N), 133 kg N ha-1 (133-N), y 400 kg N ha-1 (400-N), utilizando la variedad Granola en la región Los Andes, Mérida, Venezuela. En las principales fases fenológicas del cultivo se midió el área foliar con un analizador de dosel. El IAF presentó diferencias significativas entre tratamientos y fases fenológicas del cultivo, excepto durante la etapa de emergencia. Los máximos valores de IAF fueron alcanzados cerca de los 55 días después de la emergencia, 400-N (1,42 0,16) > 133-N (0,92±0,21) > 0-N (0,34±0,08). Se demostró que la fertilización nitrogenada tuvo un efecto significativo sobre el desarrollo del índice de área foliar del cultivo de papa durante diferentes fases de fenológicas.

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How to Cite

Villa, P. M., Sarmiento, L., Rada, F. J., Machado, D., & Rodrigues, A. C. (2017). Leaf area index of potato (Solanum tuberosum L.) crop under three nitrogen fertilization treatments. Agronomía Colombiana, 35(2), 171-175. https://doi.org/10.15446/agron.colomb.v35n2.62110

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