Nitrogen Use Efficiency of Potato
2019-07
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Nitrogen Use Efficiency of Potato
Authors
Published Date
2019-07
Publisher
Type
Thesis or Dissertation
Abstract
Potato (Solanum tuberosum) production typically occurs on sandy soils with only 40-60% of the applied nitrogen (N) acquired by the crop. Nitrogen fertilization rates in potato are upwards of 336 kg N ha-1. Increased N use efficiency (NUE) and its component parts, N utilization efficiency (NUtE) and N uptake efficiency (NUpE), could drastically reduce fertilizer rates and losses to the environment. We grew 12 advanced breeding selections from the University of Minnesota red potato breeding population and two elite checks under two N rates, 101 kg N ha-1 and 202 kg N ha-1. We compared NUE, NUpE and NUtE in low and high N using 45 day after planting (DAP) root phenotypes and harvest yield and skin quality metrics. We found that NUtE correlated with NUE and yield in low N and NUpE correlated with NUE and yield in high N. Low N favored smaller tubers <6.35 cm in diameter (USDA small), while high N favored tubers between 6.35cm to 8.26cm diameter (USDA medium). Nitrogen did not significantly affect skinning and redness but did significantly affect skin lightness, with low N resulting in slightly lighter skin color. Finally, we found that greater total root mass, stolon root, or basal root, correlated with greater yield and NUE, but did not correlate with measures of N uptake.
Description
University of Minnesota M.S. thesis. July 2019. Major: Applied Plant Sciences. Advisor: Thomas Michaels. 1 computer file (PDF); v, 78 pages.
Related to
Replaces
License
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
Jones, Colin R.. (2019). Nitrogen Use Efficiency of Potato. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/206167.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.