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The effect of density on tuber yield in plants grown from true potato seed in seed beds during two contrasting seasons

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Abstract

The production of potatoes from true seed was studied in direct-sown seed beds during both winter and summer seasons in Lima, Peru. After emergence, seedlings were thinned to give 6, 12, 24, 48 or 96 plants per m2. In all five density treatments plants were arranged in a square configuration. In both seasons, increasing plant density significantly increased total tuber number as well as tuber weights in the grades 1–5 g, 5–20 g and 20–40 g. The yield of tubers larger than 40 g was similar in all densities. In the warm summer season, tuber number was significantly reduced and mean tuber weight was 56% greater compared with that in the winter season. The potential of producing consumer potatoes from true seed in seed beds in warm climates is discussed.

Resumen

Se estudió la producción de papas a partir de semilla botánica sembrada directamente en camas tanto en la estación de invierno como en la de verano, en Lima, Perú. Después de la emergencia, las plántulas fueron raleadas para obtener 6, 12, 24, 48, y 96 plantas por m2. En todos los tratamientos las plantas estaban distribuídas formando cuadrados. En ambas estaciones, el incremento en la densidad de las pantas incrementó significativamente el número total de tubérculos al igual que el peso de los tubérculos en los tamaños de 1–5 g, 5–20 g, y 20–40 g. El rendimiento de los tubérculos mayores de 40 g fue similar en todas las densidades. En la estación cálida del verano, el número de tubérculos fue reducido significativamente y el peso promedio de los mismos fue 56% mayor en comparación con el obtenido en la estación de invierno. Se discute el potencial de la producción de papas para consumo a partir de semilla botánica sembrada directamente en camas en climas cálidos.

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Wiersema, S.G. The effect of density on tuber yield in plants grown from true potato seed in seed beds during two contrasting seasons. American Potato Journal 63, 465–472 (1986). https://doi.org/10.1007/BF02852941

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