Graduate Thesis Or Dissertation
 

Seed development in monogerm sugar beets (Beta vulgaris L.) as influenced by certain nutrients

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  • The influence of several fertilizer elements on the occurrence of underdeveloped seeds in monogerm sugar beets (Beta vulgaris L.) was studied. Lime (CaCO₃), nitrogen, phosphorus and potassium fertilizer applications were made to sugar beet seed plots at two locations in the Willamette Valley, Oregon. Seed produced from each treatment was examined by radiography to determine the percentage of fruits containing underdeveloped seeds. Underdeveloped seeds include those which are completely absent from the fruit locule and those which are only partially developed. High nitrogen fertilization negatively influenced seed development, causing an increase in the occurrence of underdeveloped seeds. A larger difference in underdeveloped seeds was noted, however, between the two experimental locations. Lime, phosphorus and potassium applications had no apparent influence on seed development. Experimental locations and nitrogen fertilizer levels influenced the concentrations of several nutrient elements in the sugar beet petioles. But no association was apparent between plant nutritional status and the occurrence of underdeveloped seeds. It was concluded that inadequate or imbalanced fertilizer applications were not the primary factors impeding sugar beet seed development. Although excess nitrogen fertilization was detrimental to seed development, it accounted for only a fraction of the total underdeveloped seeds obtained.
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Déclaration de droits
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  • File scanned at 300 ppi using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
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