Abstract
A three-year investigation determined effects of N, P, K, and S rates on tuber yield and quality, economic return, and plant nutrient status of Russet Burbank grown on mineral soils in the Klamath Basin of Oregon. Yield responses were consistent over years. The highest yields and economic returns were achieved with the combination of 202 kg N, 29 kg P, 56 kg K, and 22 kg S ha-1. Petiole NO3-N concentrations were below published critical levels at the optimal N fertilizer rate of 202 kg N ha-1. Yield and economic return responses to increasing N rates were positive but small. The highest yield occurred at the lowest P rate (29 kg ha-1). Tuber yield, grade, or quality did not respond to K fertilization. Findings suggest that nitrogen fertilizer management based on petiole analysis may require modifications for short growing-season environments.
Compendio
Una investigación de tres años determinó los efectos de las dosis de N, P, K y S sobre el rendimiento en tubérculos y su calidad, tasa de retorno económico y la situación de los nutrientes en plantas de Russet Burbank creciendo en suelos minerales en la cuenca del Klamath en Oregón. La respuesta en rendimientos fue consistente en todos los años. Los rendimientos y tasas de tetorno económico más altos se lograron con la combinación de 202 kg de N, 29 kg de P, 56 kg de K y 22 kg de S por hectárea. Las concentraciones de NO3 -N en el peciolo estuvieron por debajo de los niveles críticos publicados a una tasa óptima de fertilizante nitrogenado de 202 kg N/ha. Las respuestas en rendimiento y tasa de retorno económico a dosis crecientes de N fueron positivas, pero pequeñas. El rendimiento más alto se presentó en la dosis más baja de P (29 kg/ha). El rendimiento en tubérculos, y el grado o calidad no respondieron a la fertilización con K. Los resultados sugieren que el manejo del fertilizante nitrogenado, basado en el análisis del peciolo, puede requerir modifîcaciones para ambientes de temporada corta de crecimiento.
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Approved for publication by Oregon State University Agricultural Communications as Technical paper No. 10,020.
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Rykbost, K.A., Christensen, N.W. & Maxwell, J. Fertilization of Russet Burbank in short-season environment. American Potato Journal 70, 699–710 (1993). https://doi.org/10.1007/BF02848676
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DOI: https://doi.org/10.1007/BF02848676