Abstract
A study was conducted over a three year period in southern Alberta to establish the yield and quality responses of eight potato varieties-Atlantic, Conestoga, Norchip, Niska, Shepody, Ranger Russet (Idaho clone), Ranger Russet (Amisk clone) and Russet Burbank to a single transient moisture stress (-80 kPa) at three growth stages in crop development (early, midseason and late). Early and midseason moisture stress had the greatest negative impact (P<0.05) on tuber yield. Of the eight varieties, Atlantic and Conestoga appear to be particularly sensitive to stress at these two growth stages. Midseason stress also appeared to reduce specific gravity. A year x stress interaction (P<0.05) for fry color suggests that the influence of moisture stress on fry color can be modified by other environmental factors. The results of the study demonstrate the importance of maintaining adequate soil moisture at all stages during crop development.
Compendio
Se condujo un estudio en un periodo de tres años al sur de Alberta, para establecer la respuesta en rendimiento y calidad de ocho variedades [Atlantic, Conestoga, Norchip, Niska, Shepody, Ranger Russet (clon de Idaho), Ranger Russet (clon de Amisk) y Russet Burbank], a un estrés temporal a la humedad (-80 kPa) en tres estados de crecimiento durante el desarrollo del cultivo (temprano, a media temporada y tardíamente). El estrés al comienzo y a mediados de la temporada tuvo el mayor impacto negativo (P<0.05) sobre el rendimiento en tubérculos. De las ocho variedades, Atlantic y Conestoga parecen ser particularmente sensibles al estrés en estos dos estados de crecimiento. El estrés, a mitad de temporada, parece que también disminuyó la gravedad específica. Una interacción año x estrés (P<0.05), para color de fritura, sugiere que la influencia del estres sobre éste puede ser modifïcada por otros factores ambientales. Los resultados del estudio demuestran la importancia de mantener una humedad adecuada en el suelo en todos los estados durante el desarrollo del cultivo.
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Lynch, D.R., Foroud, N., Kozub, G.C. et al. The effect of moisture stress at three growth stages on the yield, components of yield and processing quality of eight potato varieties. American Potato Journal 72, 375–385 (1995). https://doi.org/10.1007/BF02849334
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DOI: https://doi.org/10.1007/BF02849334