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Agronomy Journal Abstract -

Seed and Oil Characteristics of Nitrogen Fertilized Meadowfoam1


This article in AJ

  1. Vol. 73 No. 2, p. 255-256
    Received: Apr 24, 1979

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  1. J. M. Crane,
  2. W. Calhoun and
  3. 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.

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