Urea and ammonium nitrate were applied to leaves of maize plants growing in growth chambers on nutrient solutions containing three different concentrations of ammonium nitrate. Dry weights, and the soluble protein contents of leaves, sterns and roots we remeasured. Both urea and ammonium nitrate did increase the dry weights of leaves and stems when ammonium nitrate was used in the nutrient solutions (0.5 and 2.5 mM/ liter). When nitrogen was not used in the nutrient solutions, no increments of dry weight occurred. The protein contents of leaves were increased for plants in the same nutrient solutions that produced increases in the dry weights, except that urea did not increase protein contents of stems. The dry weights of roots were increased by foliar applied urea when ammonium nitrate was used in the nutrient solutions but not when the nutrient solutions were without nitrogen. Ammonium nitrate applied to the foliage did not increase the dry weights of roots. The protein contents of roots were not increased by urea or ammonium nitrate applied to the leaves. The increments in the dry weights and protein contents given by foliar applied urea were superior to those of foliar applied ammonium nitrate, with the exception of the protein content of stems.
| Identifer | oai:union.ndltd.org:UTAHS/oai:digitalcommons.usu.edu:etd-4843 |
| Date | 01 May 1969 |
| Creators | Fiallos, Alvaro |
| Publisher | DigitalCommons@USU |
| Source Sets | Utah State University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | All Graduate Theses and Dissertations |
| Rights | Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact digitalcommons@usu.edu. |
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