Abstract
Trials were conducted in Alberta with Norchip, Norland, and Russet Burbank and in Ontario with Kennebec, Russet Burbank, Norchip, and Superior tubers to determine their response to short-term exposure to air temperatures of 0, −1, and −5 C and to long-term exposure to −1, 0, 1,2, and 3 C. Exposure of seed tubers to −1 C from 6 hours to 5 days did not affect growth characteristics or tuber yield of any of the five cultivars studied. Long-term (October–May) exposure to −1 C in one study severely reduced emergence and tuber yield of Norchip (P<0.05). While the marketable yield of Russet Burbank was also reduced (P<0.05) by this treatment, Norland was not affected. Tubers of all cultivars exposed to air temperatures of −3 or −5 C for longer than 24 hours were severely injured and were not planted in the field trials at either location. In Alberta exposure of seed tubers of Norchip, Norland, and Russet Burbank to −5 C for 6 and 12 hours caused a reduction (not significant) in yield. In Ontario, long-term storage at 1, 2, and 3 C and in combination with short-term (2 weeks) exposure to 0 or 10 C had no effect on growth or marketable yield of Norchip, Russet Burbank, Superior, and Kennebec seed tubers.
Compendio
En Alberta, se condujeron ensayos con tubérculos de Norchip, Norland, y Russet Burbank y en Ontario con los de Kennebec, Russet Burbank, Norchip, y Superior, para determinar su respuesta a la exposición por corto tiempo a temperaturas del aire de 0, −1, y -5°C y a exposiciones por largo tiempo a −1, 0, 1, 2, y 3°C. La exposición de los tubérculos-semillas a −1°C, de 6 horas a 5 días, no afectó las caracteristicas de crecimiento o el rendimiento en tubérculos de ninguno de los cinco cultivares estudiados. En un estudio, la exposición por largo tiempo (octubre–mayo) a −1 °C redujo severamente la emergencia y el rendimiento en tubérculos de Norchip (P<0,05).
Mientras que el rendimiento comerciable de Russet Burbank fue también reducido (P≪0,05) por este tratamiento, Norland no fue afectado. Los tubérculos de todos los cultivares expuestos a temperaturas del aire de −3 o −5°C por más de 24 horas fueron severamente dañados y no fueron sembrados en los ensayos llevados a cabo en ambas localidades. En Alberta, la expositión de los tubérculos-semillas de Norchip, Norland, y Russet Burbank a −5°C, de 6 a 12 horas, causó una reducción (no significativa) en rendimiento. En Ontario, el almacenamiento prolongado a 1,2, y 3°C y en combination con una corta expositión (2 semanas) a 0 o 10°C no tuvo efecto sobre el crecimiento o el rendimiento comerciable de tubérculos-semillas de Norchip, Russet Burbank, Superior, y Kennebec.
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Lynch, D.R., Coffin, R.H. Effect of short- and long-term exposure of seed tubers to low temperatures on the growth and yield of five potato cultivars. American Potato Journal 65, 57–66 (1988). https://doi.org/10.1007/BF02867453
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DOI: https://doi.org/10.1007/BF02867453