Does phosphite, a reduced form of phosphate contribute to phosphorus nutrition in corn (Zea mays L.)?. (28th May 2019)

• Record Type: Journal Article
• Authors: Sutradhar, Apurba K.; Arnall, Daryl B.; Dunn, Bruce L.; Raun, William R.
• Is Part Of: Journal of plant nutrition. Volume 42:Number 9(2019)
• Page Start: 982
• Page End: 989
• Publication Date: 2019-05-28
• Subjects: phosphite -- phosphorus -- corn; Plants -- Nutrition -- Periodicals; Plants -- Effect of minerals on -- Periodicals; Deficiency diseases in plants -- Periodicals; 575.76
• DOI: 10.1080/01904167.2019.1589503
• Languages: English
• ISSNs: 0190-4167

Abstract

Abstract: Although fungicidal properties of phosphite have been recognized, its use as a fertilizer-P is still being debated. The objective of this study was to evaluate the effect of foliar-applied phosphite (HPO3 −2 ) on the growth and yield of corn ( Zea mays L.). Traditional fertilizer-P was also applied to compare the efficacy of phosphite. Dry matter yield, grain yield, and tissue P concentrations (grain, leaf, and stem) were evaluated in two field and two greenhouse studies in Oklahoma for 2 years. A commercial phosphite solution which contains 200 g P kg −1 was sprayed at the rate of 2.34 L ha −1 at different growth stages. Foliar phosphite did not increase dry matter and grain yield. In general, P concentrations in the grain, leaf, and stem were unaffected regardless of number of applications. Farmers should take with caution while using phosphite as a fertilizer to correct P deficiency for corn production.