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Canola is a major oil seed crop worldwide and it is also an
important crop in Mediterranean areas where salinity is an
increasing problem. Although seed oil of standard cultivated
canola is considered to be of good quality for edible
purposes, the development of cultivars with oil high in
oleic acid is an important breeding objective for this crop.
In this paper, the effect of salinity, silicium and
different nitrate and ammonium ratio were evaluated on
growth, sodium and potassium content nitrate reductase
activity and fatty acid composition. Canola plants were
grown in a pot hydroponically system. The results revealed
that, salinity significantly decreased plant growth,
potassium accumulation, K/Na ratio and linolenic acid
percentage while increased sodium content and oleic acid
percentage. Also, silicium increased plant growth, oleic
acid and linolenic acid percentage, potassium content, K/Na
ratio and silicium content. Silicium prevented sodium
accumulation in plants. Among different nitrate and ammonium
ratios 25:75 ratio was the best treatment in respect of
plant growth.
Key words:
Ammonium, nitrate, salinity, silicium, canola.
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