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American Potato Journal

, Volume 54, Issue 4, pp 125–136 | Cite as

Influence of fertilizer, irrigation, and storage treatments on nitrate-N content of potato tubers

  • J. Augustin
  • R. E. McDole
  • G. C. Painter
Article

Abstract

A survey was undertaken to investigate the nitrate-nitrogen (NO3-N) content of potatoes grown on different soil types with different fertilizer and irrigation treatments. Tuber nitrate-N contents were determined immediately after harvest and after periods of storage of up to 210 days.

Nitrate-N in tubers (dry weight basis) ranged from low values of 82 to 122 ppm for low nitrogen fertility levels to a maximum of 192 to 285 ppm at the highest nitrogen rates, where irrigation was applied at optimum levels. The average nitrate-N in tubers under such conditions was 150 to 160 ppm. Where irrigation management was less than optimum, the nitrate-N content of tubers increased, reaching an average maximum value of 786 ppm at the highest fertilizer rate. The study showed that the nitrate-N level in tubers increased with nitrogen fertilization rates, although there was not a linear relationship between N fertilizer rate and tuber nitrate-N. The highest nitrate-N levels obtained in the tubers under proper irrigation management, even with 800 lb N/A, did not exceed 300 ppm nitrate-N and were usually less than 200 ppm. Data collected from this study suggest that improper irrigation, especially with high nitrogen fertilizer rates, results in a dramatic increase in nitrate-N level in the tubers. Some individual tubers contained over 1200 ppm nitrate-N. There was an apparent slight increase in nitrate-N in the tubers with storage, although this increase was not consistent.

Keywords

Potato Tuber AMERICAN Potato Journal Nitrogen Fertilizer Nitrogen Fertilization Soil Moisture Level 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Resumen

Se realizó un estudio para investigar el contenido nitrógeno-nitrato (N-NO3) de papas desarrollados en diferentes tipos de suelos con diferentes tratamientos de fertilización e irrigación. El contenido de, N-nitrato fue determinado inmediatamente después de la cosecha y después de periodos de almacenaje de hasta 210 días.

El N-nitrato en tubérculos (en base a peso seco) estuvo entre valores bajos como 82 a 122 ppm para bajos niveles de fertilidad y máximos de 192 a 285 ppm a los mas altos niveles de nitrógeno, cuando la irrigación fue aplicada a niveles optimos. El promedio de N-nitrato en tubérculos bajo tales condiciones fue de 150a 160 ppm. Cuando la irrigacíon fue menor que el Óptimo, el contenido de N-nitrato de los tubérculos incrementó, alcanzando un valor promedio máximo de 786 ppm al nivel de fertilizante mas elevado. El estudio mostró que el nivel de nitrógeno nitrato en tubérculos incrementó con los niveles de fertilización nitrogenada, si bien no hubo una relatión lineal entre las dosis de fertilización nitrogenado y el N-nitrato de los tubérculos. Los niveles mas altos de N-nitrato obtenidos en los tubérculos bajo apropiadas prácticas de irrigación, aun con 800 libras de nitrógeno por acre, no excedieron de 300 ppm de N-nitrato y fueron usualmente menores que 200 ppm. Datos obtenidos en este estudio sugieren que impropia irrigación, especialmente con altas dosis de ferilizante nitrogenado, resulta en un incremento dramático en el nivel de N-nitrato en los tubérculos. Algunos tubérculos individuales contenían sobre las 1200 ppm de N-nitrato en los tubérculos con el almacenaje, y si bien este incremento no fue consistente.

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Copyright information

© Springer 1977

Authors and Affiliations

  • J. Augustin
    • 1
  • R. E. McDole
    • 2
  • G. C. Painter
    • 3
  1. 1.Food Research CenterUniversity of IdahoMoscow
  2. 2.University of Idaho Research & Extension CenterAberdeen
  3. 3.University of IdahoTwin Falls

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