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Field emergence dynamics significance to intraspecific competition and growth efficiency in sugar beet (Beta vulgaris L.)

  • Autor/in: Stibbe, C., B. Märländer
  • Jahr: 2002
  • Zeitschrift: Europ. J. Agronomy 17
  • Seite/n: 161-171

Abstract

Significance of field emergence dynamics on sugar beet growth was examined in order to determine the effect of individual date of emergence on early growth of single plants using plant growth analysis. The effect of a prolonged field emergence period on yield and quality of the sugar beet crop was investigated using simulated prolonged field emergence periods. Field trials were conducted on a loamy soil in Göttingen in 1998. Early growth of sugar beet was exponential. A delay of emergence had a significant negative effect on the mass of total dry matter production of single plants. Date of emergence had no significant effect on relative growth rate of single plants thus the efficiency of growth. Plants with delayed emergence were not able to compensate for the delay in dry matter production and therefore, contributed less to the dry matter formation of the crop. A prolonged field emergence period showed significant negative effects on yield parameters, but no effects on the quality of the beet. These effects on yield are formed by increased intraspecific competition to light caused by shading of delayed emerged plants.
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