Effect of Fertilizer and Irrigation on Nitrate-Nitrogen and Total Nitrogen in Potato Tubers

Carter, J.N. and Bosma, S.M. (1974) Effect of Fertilizer and Irrigation on Nitrate-Nitrogen and Total Nitrogen in Potato Tubers. Agronomy Journal. 66(2):263-266.

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Abstract

This study was conducted to determine the effect of N fertilizer and irrigation management on potato (Solanum tuberosum L.) tuber NO?-N levels and the relationship to the potential health hazard created by high nitrate levels in food products. 'Russet Burbank' potatoes grown using different N fertilizer rates, methods of application, and irrigation levels were analyzed for NO?-N concentration. The NO?-N concentration in the tubers on a wet weight basis varied from 36 to 131, 34 to 75, and 25 to 50 ppm in the 3 years of this study. The NO?-N concentration for each year of study was found to be directly related to the level of applied N fertilizer. The initial concentration and increase in NO?-N due to N fertilizer varied with the season. The addition of manure did not increase the NO?-N level above those to be expected from similar quantities of inorganic sources of N. Phosphorus fertilizer did not increase the NO?-N level. The NO?-N concentration in the tubers where more water was applied at each irrigation was less than on the lower level of applied water at each N rate. These data indicate that greater NO?-N levels in the tubers will result by increasing N fertilization rates. The levels of NO?-N obtained in this study were not expected to contribute substantially to the methemoglobinemia health hazard.

Item Type: Article
NWISRL Publication Number: 0279
Subjects: Irrigated crops > Potato
Soil > Amendments > Fertilizer
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:51
Last Modified: 16 Feb 2017 21:37
Item ID: 254
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/254

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