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The effect of nitrate- and ammoniacal-nitrogen on organic nitrogen fractions and free ammonia in the greenhouse chrysanthemum 'Indianapolis Yellow'


, : The effect of nitrate- and ammoniacal-nitrogen on organic nitrogen fractions and free ammonia in the greenhouse chrysanthemum 'Indianapolis Yellow'. Ohio Florists' Association Bulletin (557): 10

Ammonium sulphate and sodium nitrate were compared as N sources for chrysanthemums grown in summer and winter. Except under ideal light conditions the carbohydrate reserves of plants given NH4-N became very low; growth was soft and dark green, rooting was not vigorous and cropping was poor. In general, summer crops given NO3-N had larger flowers but those given NH4-N made better vegetative growth.

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