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Article
Phosphorus and Potassium Fertilization Effects on Soybean Seed Quality and Composition
Crop Science
  • Keaton Krueger, Iowa State University
  • A. Susana Goggi, Iowa State University
  • Antonio P. Mallarino, Iowa State University
  • Russell E. Mullen, Iowa State University
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
3-1-2013
DOI
10.2135/cropsci2012.06.0372
Abstract

The effects of P and K fertilization on soybean [Glycine max (L.) Merr.] seed quality are unclear. Fertilization rates can have a positive effect on yield and composition in some growing locations and years but not in others. As the cost of soybean seed production increases, seed companies are interested in improving seed quality of soybeans possibly through increased soil fertilization. The objectives of this study were to determine the effect of different levels of P and K fertilization on soybean seed quality defined as seed viability, vigor, and seed composition. Seed samples were obtained from a long-term P and K fertilization trial. Phosphorus and K treatments were 0, 28, or 56 kg P ha−1 yr−1 and 0, 66, or 132 kg K ha−1 yr−1. Results indicated that excessive levels of P and K fertility decreased seed quality. Seed composition changed across sites and treatments, but changes were generally inconsistent. Total seed protein and oil were not significantly affected by P and K fertilization in most locations. However, linolenic acid concentrations increased with excessively high P and K fertilization while linoleic acid concentrations decreased only with P. These results indicate that excessively high levels of soil fertility may have a negatively impacted on seed quality.

Comments

This is a mansucript of an article published as Krueger, K., A. S. Goggi, A. P. Mallarino, and R. E. Mullen. 2013. Phosphorus and Potassium Fertilization Effects on Soybean Seed Quality and Composition. Crop Sci. 53:602-610. doi:10.2135/cropsci2012.06.0372. Posted with permission.

Copyright Owner
Crop Science Society of America
Language
en
File Format
application/pdf
Citation Information
Keaton Krueger, A. Susana Goggi, Antonio P. Mallarino and Russell E. Mullen. "Phosphorus and Potassium Fertilization Effects on Soybean Seed Quality and Composition" Crop Science Vol. 53 Iss. 2 (2013) p. 602 - 610
Available at: http://works.bepress.com/asusana-goggi/14/