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Improving Nitrogen Use Efficiency of Potted Chrysanthemums Grown in a Subirrigation System

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dc.contributor.advisor Shelp, Dr. Barry J.
dc.contributor.advisor Blom, Dr. Theo J.
dc.contributor.author MacDonald, William N.
dc.date.accessioned 2013-02-14T14:14:02Z
dc.date.available 2013-02-14T14:14:02Z
dc.date.copyright 2013-02
dc.date.created 2013-02-04
dc.date.issued 2013-02-14
dc.identifier.uri http://hdl.handle.net/10214/5532
dc.description.abstract This thesis tested the hypothesis that nitrogen use efficiency of subirrigated potted chrysanthemum (Chrysanthemum morifolium Ramat.) can be improved by managing the NO3- status of the plant. Replacement of NO3- with water one week prior to flower development was the most effective method of reducing tissue NO3- content and improving the nitrogen usage index, as compared to various combinations of NO3- and Cl-. Shoot or flower dry mass and N content were unaffected and the medium electrical conductivity was reduced. Supplying N in the NH4+ form in combination with NO3- did not affect nitrogen use indices. Reducing N supply improved various indices of nitrogen use efficiency, with a slight loss of quality. Elimination of NO3- prior to flower development and reduction in N supplied are effective strategies for improving nitrogen use efficiency in subirrigated potted chrysanthemums without sacrificing quality. en_US
dc.description.sponsorship Cecil Delworth Foundation en_US
dc.language.iso en en_US
dc.subject nitrate en_US
dc.subject nitrogen use efficiency en_US
dc.subject ammonium en_US
dc.subject subirrigation en_US
dc.subject greenhouse en_US
dc.subject remobilization en_US
dc.subject chloride en_US
dc.subject chrysanthemum en_US
dc.subject Medium EC en_US
dc.title Improving Nitrogen Use Efficiency of Potted Chrysanthemums Grown in a Subirrigation System en_US
dc.type Thesis en_US
dc.degree.programme Plant Agriculture en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Plant Agriculture en_US
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