Effect and interaction of crop management factors on the glycoalkaloid concentration of potato tubers |
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Authors: | Stephen L. Love Timothy J. Herrman Asunta Thompsonjohns Timothy P. Baker |
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Affiliation: | (1) Aberdeen R&E Center, University of Idaho, 83210 Aberdeen, ID, USA;(2) Department of Grain Science and Industry, Kansas State University, 66506 Manhattan, KS, USA;(3) Dunklin County Extension, University of Missouri, P.O. Box 160, 63857 Kennett, MO, USA |
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Abstract: | Summary Potato tuber glycoalkaloid content was measured in response to nitrogen fertilizer rate, storage temperature, length of storage period and cultivar. Cvs Gemchip, Norchip and Russet Burbank were grown with applied nitrogen fertilizer rates of 0, 168 or 336 kg/ha and then stored at either 4.4 or 10°C. Total glycoalkaloid content was determined one month before harvest, at harvest, after three months of storage and after nine months of storage. Higher rates of nitrogen, higher storage temperature and a period of storage all resulted in significantly (P<0.05) higher concentration of glycoalkaloids. The cv Norchip had higher glycoalkaloids than cvs Gemchip or Russet Burbank. Only the storage period had more influence than the environment (difference between years). Significant (P<0.05) two-way interactions were detected for year x cultivar, year x nitrogen, storage period x cultivar and nitrogen x cultivar. Most interactions were due to the unique responses of cultivars. |
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Keywords: | Solanum tuberosum L. nitrogen fertilizer potato cultivars potato storage |
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