Articles
YIELD FORMATION IN BRUSSELS SPROUTS: EFFECTS OF NITROGEN
Article number
533_46
Pages
377 – 384
Language
Abstract
Data of two field experiments, in which the nitrogen application rate was varied between 0 and 300 kg/ha, were used to analyze the factors that affect marketable yield in Brussels sprouts.
Marketable yield (Y) is a function of radiation use efficiency (RUE), cumulative intercepted radiation (IPAR), partitioning of biomass (P) and the dry matter concentration in the buds (DMC): Y=RUE*IPAR*P/DMC. The effect of nitrogen application rate on marketable yield was analyzed in these terms.
RUE was not affected by nitrogen application rate.
Nitrogen application rate had also only a small effect on P and DMC. The effect of nitrogen availability on IPAR was the key factor in determining marketable yield.
It had a strong effect on canopy development resulting in increasing interception of incoming radiation at higher nitrogen application rates.
Consequences for cultural measures to obtain maximum yield are discussed.
Marketable yield (Y) is a function of radiation use efficiency (RUE), cumulative intercepted radiation (IPAR), partitioning of biomass (P) and the dry matter concentration in the buds (DMC): Y=RUE*IPAR*P/DMC. The effect of nitrogen application rate on marketable yield was analyzed in these terms.
RUE was not affected by nitrogen application rate.
Nitrogen application rate had also only a small effect on P and DMC. The effect of nitrogen availability on IPAR was the key factor in determining marketable yield.
It had a strong effect on canopy development resulting in increasing interception of incoming radiation at higher nitrogen application rates.
Consequences for cultural measures to obtain maximum yield are discussed.
Authors
R. Booij
Keywords
biomass, Brassica oleracea var. gemmifera, Brussels sprouts, dry matter concentration, dry matter partitioning, marketable yield, nitrogen
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