{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/71788"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/71788","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The Role of Nitrogen Absorption and Utilization in Maintaining Lower Leaves of Chrysanthemum Morifolium, Ram. 'Cv. Mountain Peak' Under Low Light Conditions","abstract":"Three experiments were conducted to investigate the influence of potting media and/or nitrogen source on lower leaf yellowing and shelflife of Chrysanthemum morifolium, Ram, 'cv. Mountain Peak' under low light intensity environment. Various growth, quality, and N nutritional measurements were taken at the end of production period and throughout the simulated home environment. In comparison to the other N sources, nitrate was the superior N source for the production of chrysanthemum when vegetative growth, flower quality, and shelflife are evaluated in total. With nitrate fertilization, chrysanthemum plants produced in winter had longer shelflife in soilless than soil mix medium, while no difference was found between either potting mix for summer production.","abstract_html":"Three experiments were conducted to investigate the influence of potting media and/or nitrogen source on lower leaf yellowing and shelflife of Chrysanthemum morifolium, Ram, 'cv. Mountain Peak' under low light intensity environment. Various growth, quality, and N nutritional measurements were taken at the end of production period and throughout the simulated home environment. In comparison to the other N sources, nitrate was the superior N source for the production of chrysanthemum when vegetative growth, flower quality, and shelflife are evaluated in total. With nitrate fertilization, chrysanthemum plants produced in winter had longer shelflife in soilless than soil mix medium, while no difference was found between either potting mix for summer production.","abstract_has_math":false,"creators":["Yahya, Moosa Dawood"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Horticulture","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-16T20:45:19Z","date_published":"2014-12-16T20:45:19Z","updated_at":"2026-07-22T22:26:05Z","subjects":["Biology, Plant Physiology"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8823297"],"render_values":[{"text":"(UMI)AAI8823297","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/71788","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Yahya, Moosa Dawood"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-16T20:45:19Z","10000-01-01","1988"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Horticulture"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Biology, Plant Physiology"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/71788","(UMI)AAI8823297"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Three experiments were conducted to investigate the influence of potting media and/or nitrogen source on lower leaf yellowing and shelflife of Chrysanthemum morifolium, Ram, 'cv. Mountain Peak' under low light intensity environment. Various growth, quality, and N nutritional measurements were taken at the end of production period and throughout the simulated home environment. In comparison to the other N sources, nitrate was the superior N source for the production of chrysanthemum when vegetative growth, flower quality, and shelflife are evaluated in total. With nitrate fertilization, chrysanthemum plants produced in winter had longer shelflife in soilless than soil mix medium, while no difference was found between either potting mix for summer production.","Using ammonium fertilizer to supply all the N was deleterious for chrysanthemum plants during winter and summer with either potting mix. The poor quality and/or low shelflife of chrysanthemum plants fertilized with ammonium was attributed to the accumulation of free ammonium and soluble organic N (amines and amides) in the leaves. The development of severe acidic conditions in the medium of ammonium-fertilized plants resulted in a poor root growth and reduction of water uptake which accelerated the deterioration of the plants shortly after entering the home environment. The roots of ammonium-fertilized plants contained the lowest level of carbohydrate during the simulated home environment in comparison to plants grown with the other N sources.","A mixture of ammonium and nitrate (up to 1:1) was successful in producing a satisfactory chrysanthemum crop and resulted in an extended shelflife in either soilless or soil mix media, provided the potting medium pH was maintained over 6.0 during the production period. Maintaining the medium pH over 6.0 was associated with a reduction in free ammonium content in lower leaves and roots as compared to plants grown in an acidic medium.","Made available in DSpace on 2014-12-16T20:45:19Z (GMT). No. of bitstreams: 1 8823297.pdf: 4755640 bytes, checksum: b0b4c421aa0ae97dc40ecf6ffe58db6e (MD5) Previous issue date: 1988","Embargo set by: Seth Robbins for item 71954 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","154 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1988."]},{"key":"dc:title","label":"Title","values":["The Role of Nitrogen Absorption and Utilization in Maintaining Lower Leaves of Chrysanthemum Morifolium, Ram. 'Cv. Mountain Peak' Under Low Light Conditions"]}]}],"canonical_facts":{"dc:creator":["Yahya, Moosa Dawood"],"dc:date":["2014-12-16T20:45:19Z","10000-01-01","1988"],"dc:description":["Three experiments were conducted to investigate the influence of potting media and/or nitrogen source on lower leaf yellowing and shelflife of Chrysanthemum morifolium, Ram, 'cv. Mountain Peak' under low light intensity environment. Various growth, quality, and N nutritional measurements were taken at the end of production period and throughout the simulated home environment. In comparison to the other N sources, nitrate was the superior N source for the production of chrysanthemum when vegetative growth, flower quality, and shelflife are evaluated in total. With nitrate fertilization, chrysanthemum plants produced in winter had longer shelflife in soilless than soil mix medium, while no difference was found between either potting mix for summer production.","Using ammonium fertilizer to supply all the N was deleterious for chrysanthemum plants during winter and summer with either potting mix. The poor quality and/or low shelflife of chrysanthemum plants fertilized with ammonium was attributed to the accumulation of free ammonium and soluble organic N (amines and amides) in the leaves. The development of severe acidic conditions in the medium of ammonium-fertilized plants resulted in a poor root growth and reduction of water uptake which accelerated the deterioration of the plants shortly after entering the home environment. The roots of ammonium-fertilized plants contained the lowest level of carbohydrate during the simulated home environment in comparison to plants grown with the other N sources.","A mixture of ammonium and nitrate (up to 1:1) was successful in producing a satisfactory chrysanthemum crop and resulted in an extended shelflife in either soilless or soil mix media, provided the potting medium pH was maintained over 6.0 during the production period. Maintaining the medium pH over 6.0 was associated with a reduction in free ammonium content in lower leaves and roots as compared to plants grown in an acidic medium.","Made available in DSpace on 2014-12-16T20:45:19Z (GMT). No. of bitstreams: 1 8823297.pdf: 4755640 bytes, checksum: b0b4c421aa0ae97dc40ecf6ffe58db6e (MD5) Previous issue date: 1988","Embargo set by: Seth Robbins for item 71954 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","154 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1988."],"dc:identifier":["http://hdl.handle.net/2142/71788","(UMI)AAI8823297"],"dc:subject":["Biology, Plant Physiology"],"dc:title":["The Role of Nitrogen Absorption and Utilization in Maintaining Lower Leaves of Chrysanthemum Morifolium, Ram. 'Cv. Mountain Peak' Under Low Light Conditions"],"dc:type":["text"],"thesis:degree_discipline":["Horticulture"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:05Z"}