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Analysis of growth in Kennebec with emphasis on the relationship between stem number and yield

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Abstract

The basis of differences in tuber yield of potato cv. Kennebec, due to varying stem numbers per plant, was studied by measuring changes in leaf-area and dry weight throughout the season. Initially the dry weight yield of tubers was related to leaf-area but following the attainment of maximum leaf-area this relationship no longer held. The final yield of tubers was shown to depend mainly on the net assimilation rate (E) late in the season. At this time E was controlled by the sink demands of the bulking tubers and these in turn were influenced by tuber number. Yields increased as the number of stems increased through one, two and four per plant-hill.

Resumen

La base las diferencias en el rendimiento de tubéculos de papa, cv. Kennebec, debido a la variatión en el numúro de tallos por planta, fue estudiada midiendo los cambios en area foliar y peso seco durante el periodo de crecimiento. Inicialmente el rendimiento de materia seca de los tubérculos estuvo relacionado al area foliar pero después de la consecución del area foliar máxima esta relatión ya no se mantuvo. Se demos tróaue el rendimiento total de tubérculos dependió principalmente de la rata de asimilación neta (E) al final del periodo de creci miento. En esta etapa E fue controlado por la demanda de los tubérculos por metabolitos, y esta a su vez fue influenciada por el núméro de tubérculos. Los rendimientos aumentaron a medida que el número de tallos aumentaba de uno a dos y a cuatro por mata de plantas.

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Authors
  1. W. B. Collins
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Additional information

A contribution from Agriculture Canada, Research Station, Fredericton, New Brunswick.

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Collins, W.B. Analysis of growth in Kennebec with emphasis on the relationship between stem number and yield. American Potato Journal 54, 33–40 (1977). https://doi.org/10.1007/BF02857224

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  • DOI: https://doi.org/10.1007/BF02857224

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