Abstract
Abstract A glasshouse study was undertaken to evaluate the effects of nitrogen (N) supply on the vegetative growth, yield components and the distribution of N in Linola™ (low linolenic acid linseed). Nitrogen stress reduced the number of tillers (secondary basal stems) and fruiting branches per plant. Severely N‐stressed plants produced only 20% of the dry matter of plants provided with an adequate N supply. The dry‐matter harvest index of the shoot was negatively related to N supply. The main effect of N stress on yield components was a reduction in the number of capsules per plant; seed number per capsule and the 1000‐seed weight were not altered by N stress. Nitrogen stress reduced seed and oil yields per plant through its effect on capsule production. Seed yield and seed oil percentage were reduced by excessively high levels of N supply. Concentrations of total N were highest in leaves and lowest in roots. There was little change in seed N concentrations in relation to N supply. Concentrations of nitr...
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