Seed and Oil Characteristics of Nitrogen Fertilized Meadowfoam1
- J. M. Crane,
- W. Calhoun and
- T. A. Ayres2
Meadowfoam (Limnanthes alba Benth.) is a potential new oilseed crop. However, effects of fertilization on oil content and fatty acid composition have received limited attention. This 3-year field study was designed to determine the effects of ammonium sulfate and ammonium nitrate used at two rates, 50 and 100 kg/ha, on meadowfoam seed protein content, oil content, and oil fatty acid composition. The plots were located on a silt loam soil (fine silty, mixed mesic Aquultic Argixeroll) near Corvallis, Oregon. Seed protein content increased as much as 29% over the control as N levels increased whereas seed oil content decreased with each increase of N. For any given N level, ammonium sulfate caused greater response thn ammonium nitrate for all characters measured. The C20 monoene (cis-5-eiocosenic acid) of the meadowfoam oil was reduced by the application of N in 1974 and 1975, but not 1977. Application of N increased the C22 diene content (cis-5-cis 13 docosadienoic acid) in all 3 years. These results demonstrate that fatty acid composition of meadowfoam oil can be altered by applying N, but that the total oil content of the seed is reduced.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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