Abstract
Field trials were carried out during 1995–1998 in commercial crops of five potato cultivars grown at several locations in Argentina to test maleic hydrazide (MH potassium salt, 36% ) effects on tuber yield, sprouting characteristics, and processing quality. MH was applied at growth stage IV, when developing tubers were 40–70 mm, at 9, 10,12 and 14 1 ha-1 in single or split treatments. MH treatments did not produce phytotoxicity symptoms in the foliage and did not decrease tuber yield. MH increased tuber yield in Kennebec, Russet Burbank and Shepody in several experiments, while not in Atlantic and Ranger Russet. MH treatments delayed initial sprouting date and inhibited sprout growth during storage periods up to 8 months, which resulted in lower weight losses due to sprouting. Tuber dry matter content and fry color were similar or in some cases improved due to MH treatments, while no consistent results were found regarding reducing sugar content.
Resumen
Durante 1995–1998 se llevaron a cabo, en distintas localidades de la Argentina, diversos ensayos a campo en cultivos comerciales de varios cultivares de papa a fin de evaluar los efectos de la hidrazida maleica (HM, sal potásica 36%) sobre el rendimiento, la brotación y la calidad industrial. La HM fue aplicada al estado de crecimiento IV, cuando los tubérculos alcanzaban 40–70 mm a razón at 9,10,12 and 14 l ha-1, en forma única o dividida. Los tratamientos con HM no produjeron síntomas de fitotoxicidad en el follaje y no disminuyeron el rendimiento. La HM incrementó los rendimientos en tubérculos en los cultivares Kennebec, Russet Burbank y Shepody, pero no en Atlantic y Ranger Russet. La fecha de inicio de brotación fue retrasada y el crecimiento de los brotes significativamente inhibido, tanto en condiciones controladas, como durante el almacenamiento en pilas a campo por hasta 8 meses, lo cual determinó que se produjeran menores pérdidas de peso. El porcentaje de materia seca y el color de fritado fue similar o en algunos casos mejorado por los tratamientos con HM, en tanto que no hubo efectos consistentes sobre el contenido de azúcares reductores.
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Caldiz, D.O., Fernandez, L.V. & Inchausti, M.H. Maleic hydrazide effects on tuber yield, sprouting characteristics, and french fry processing quality in various potato (Solanum tuberosum L.) cultivars grown under argentinian conditions. Am. J. Pot Res 78, 119–128 (2001). https://doi.org/10.1007/BF02874767
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DOI: https://doi.org/10.1007/BF02874767