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Optimizing Sulphur Delivery to Sub-irrigated, Pot-grown Chrysanthemums

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dc.contributor.advisor Shelp, Barry
dc.contributor.advisor Bozzo, Gale Sutton, William 2019-01-04T18:34:56Z 2019-01-04T18:34:56Z 2019-01 2018-11-30 2019-01-04
dc.description.abstract Greenhouse floriculture operations pose significant environmental risk due to the extensive use of fertilizer inputs and the generation of nutrient-rich wastewater. Here, we tested the hypothesis that sulphur (S) use efficiency of sub-irrigated, pot-grown chrysanthemums varies with supply and timing of S application. Two split-plot experiments (four blocks) were conducted with disbudded chrysanthemums grown under greenhouse conditions with S treatment (2.25 mmol L-1 supplied continuously over the crop cycle or 2.25, 1.125 and 0.5625 mmol L-1 S supplied during vegetative growth only) as the main plot and cultivar (‘Olympia’ and ‘Covington’) as the sub-plot. Morphological characteristics of plants with fully-expanded inflorescences were unaffected by S treatment. Construction of S and dry mass budgets revealed that S use efficiency increased significantly in both cultivars with decreasing S supply over the crop cycle. This study indicates that S delivery over the crop cycle can be markedly reduced, compared to typical commercial recommendations. en_US
dc.description.sponsorship Ontario Ministry of Agriculture, Food and Rural Affairs en_US
dc.language.iso en en_US
dc.rights Attribution-ShareAlike 4.0 International *
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dc.subject Sulphur en_US
dc.subject horticulture en_US
dc.subject nutrition en_US
dc.subject Chrysanthemum en_US
dc.subject Greenhouse en_US
dc.subject Sub-irrigation en_US
dc.title Optimizing Sulphur Delivery to Sub-irrigated, Pot-grown Chrysanthemums en_US
dc.type Thesis en_US Plant Agriculture en_US Master of Science en_US Department of Plant Agriculture en_US
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Attribution-ShareAlike 4.0 International Except where otherwise noted, this item's license is described as Attribution-ShareAlike 4.0 International