Cereal Chem 56:166 - 168.  |  VIEW ARTICLE
Effect of Nitrogen Fertilizer Treatments on the Amino Acid Composition of Neepawa Wheat.

S. Dubetz and E. E. Gardiner. Copyright 1979 by the American Association of Cereal Chemists, Inc. 

The amino acid composition of Neepawa wheat grain from a 4 x 3 factorial experiment (granular fertilizer at 0, 100, 200, and 300 kg of N/ha applied to the soil and urea at 0, 50, and 100 kg of N/ha sprayed on foliage) was determined. Amino acid responses, when they occurred, were to the first increment of nitrogen in most cases. In general, glutamic acid, proline, phenylalanine, cystine, methionine, and tyrosine increased and lysine, histidine, arginine, aspartic acid, threonine, glycine, valine, and leucine decreased with either or both forms of nitrogen application. Cystine and glycine were affected by granular nitrogen applied to the soil but not by urea nitrogen applied to the foliage. Conversely, the percentages of valine, methioine, and tyrosine were affected by urea nitrogen but not by granular nitrogen. The interactions between nitrogen treatments were significant for 12 of the amino acids. Each amino acid was significantly correlated (+ or -) with one or more of the other amino acids.