American Journal of Potato Research

, Volume 80, Issue 4, pp 251–261 | Cite as

Critical petiole nitrate concentration of two processing potato cultivars in Eastern Canada

  • G. Bélanger
  • J. R. Walsh
  • J. E. Richards
  • P. H. Milburn
  • N. Ziadi
Article

Abstract

Plant-based diagnostic methods of nitrogen (N) nutrition such as petiole nitrate (NO3-N) concentration can be used to improve the efficiency of N utilization, and hence decrease the risks of N losses to the environment. Our first objective was to determine the effect of N fertilization and supplemental irrigation on the petiole NO3-N concentration during tuber growth of two potato cultivars, Russet Burbank and Shepody, widely grown for processing in Eastern Canada. Our second objective was to establish the critical petiole NO3-N concentration using the relationship between petiole NO3-N concentration and the N nutrition index (NNI), an index based on the N concentration of shoots and tubers. This on-farm study was conducted at two sites in each of three years, 1995 to 1997. The N fertilization rates ranged from 0 to 250 kg N ha−1 with three rates in 1995, six rates in 1996, and four rates in 1997. The NO3-N concentration of petioles from the most recently mature leaves was measured on three sampling dates in 1995 and four sampling dates in 1996 and 1997. The petiole NO3-N concentration generally decreased with time. At all sites and on all sampling dates, the petiole NO3-N concentration increased with increasing N fertilization and was significantly greater for Shepody than for Russet Burbank. Irrigation had no consistent effect on petiole NO3-N concentration. Petiole NO3-N concentration was related to NNI (0.29<R2<0.62). Critical petiole NO3-N concentrations required to reach a NNI of 1.0, indicating a situation where N is not limiting growth, were greater for Shepody than for Russet Burbank, and they decreased with time. Critical petiole NO3-N concentrations (Y) expressed as a function of the number of days after planting (X) are Y = 4.80 - 0.055X for Russet Burbank and Y = 5.03 - 0.054X for Shepody.

Additional Key Words

Solanum tuberosum L. nitrogen fertilizer irrigation 

Resumen

Métodos de diagnóstico de nutrición nitrogenada (N), como el del concentrado de (NO3-N) en peciolos, pueden ser usados para mejorar la eficiencia de utiliazción del N y reducir los riesgos de pérdidas al medio ambiente. Nuestro primer objetivo fue determinar el efecto de la fertilización con N e irrigación suplementaria sobre la concentración de NO3-N en el peciolo, durante el periodo de desarrollo de tubérculos en dos cultivares de papa, Russet Burbank y Shepody,.ampliamente cultivados en el Oriente Canadinese para procesameinto. Nuestro segundo objetivo fue establecer el nievel de concentración crítico del NO3-N en el peciolo, usando la relación entre la concentracuión de NO3-N en el peciolo y el índice de nutrición de N (NNI), índice que esta basado en la concentración de N en los tallos y tubérculos. Este estudio fue conducido en finca de agricultores en dos lugares por tres años consecutivos, 1995–1997. Los niveles de fertilización oscilaron entre 0 y 250 kg N ha−1, con tres niveles en 1995, seis en 1996 y cuatro en 1997. La concentración de NO3-N en los peciolos de las hojas maduras mas recientes fue medida durante tres fechas en 1995 y cuatro fechas en 1996 y 1997. La concentración de NO3-N en el peciolo generalmente disminuyó con el tiempo. En ambos lugares y en todas las fechas en que se tomaron las muestras, la concentración de NO3-N en el peciolo se incrementó a medida que se aumentó el nivel de fertilizacion de N; siendo significativamente superior el incremento en Shepody que el de Russet Burbank. La irrigación suplementaria no tuvo un efecto consistente en la concentración de NO3-N en el peciolo. La concentración de NO3-N en el peciolo estuvo relacionada con el NNI (0.29<R2<0.62). El Nivel crítico de concentración de NO3-N en el peciolo, requerido para alcanzar un NNI de 1.0, indicando una situación en que N no es limitante en el crecimiento, fue mayor para Shepody que para Russet Burbank y disminuye con el tiempo. El nivel crítico de concentración de NO3-N en el peciolo (Y), expresado como una función del número de dias después de la siembra (X), es igual: Y = 4.80 - 0.055X para Russet Burbank y Y = 5.03 - 0.054X para Shepody.

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Copyright information

© Springer 2003

Authors and Affiliations

  • G. Bélanger
    • 1
  • J. R. Walsh
    • 2
  • J. E. Richards
    • 3
  • P. H. Milburn
    • 4
  • N. Ziadi
    • 1
  1. 1.Soils and Crops Research and Development CentreAgriculture and Agri Food CanadaQuébecCanada
  2. 2.McCain Foods LimitedFlorencevilleCanada
  3. 3.Atlantic Cool Climate Crop Research CentreAgriculture and Agri-Food CanadaSt-John’sCanada
  4. 4.Potato Research CentreAgriculture and Agri-Food CanadaFrederictonCanada

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