Nitrogen accumulation during the growing season by russett Burbank potatoes (Solanum tuberosum) Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/fj236617m

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  • Nitrogen is one of the most important nutrients influencing potato yields. The potential for environmental pollution from N is also greater than for other nutrients added as fertilizer because excessive amounts applied are subject to leaching into drainage water. The purpose of this study was to improve N fertilizer recommendations by measuring N taken up and accumulated in Russet Burbank potato plants during the growing season with various rates of N application. The field experiments were conducted in three different geographic locations of Oregon that differ markedly in soil, temperature and length of growing season. Nitrogen uptake and accumulation by whole plants (tops + tubers) was measured when the tubers were 0.75-1.0 inch in diameter and again when the larger tubers were 2.0-2.5 inches long. Nitrogen removed by the tubers at harvest time was also measured. Amounts of N required to produce the highest total yield and yield of U.S. No. 1 tubers was determined for each location with the field experiments established. At each location, the amount of N that was removed by the tubers at harvest-time was taken up by the plants before the larger size tubers were 2.0-2.5 inches long. This occurred within 97, 69 and 64 days after planting at the Hermiston, Madras and Klamath Falls locations, respectively. Optimum yield and grade were obtained with 100, 80 and 160 lbs. N/A treatment at the Hermiston, Madras and Klamath Falls locations, respectively. Difference in amounts of N required for optimum yield is a reflection of the length of growing season, N carry over from the previous crop and environmental conditions during the growing season. This study suggests that most of the N fertilizer should be applied before the larger tubers reach about two inches in diameter and that N taken up and accumulated in the plant tops is translocated to the tubers as the crop matures.
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  • description.provenance : Approved for entry into archive by Katy Davis(kdscannerosu@gmail.com) on 2014-02-24T17:31:30Z (GMT) No. of bitstreams: 1 KanjiBadrudinJ1974.pdf: 425319 bytes, checksum: 171a01adc0e8ae24316f7e9fa41b7883 (MD5)
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  • description.provenance : Approved for entry into archive by Katy Davis(kdscannerosu@gmail.com) on 2014-02-24T17:28:07Z (GMT) No. of bitstreams: 1 KanjiBadrudinJ1974.pdf: 425319 bytes, checksum: 171a01adc0e8ae24316f7e9fa41b7883 (MD5)
  • description.provenance : Made available in DSpace on 2014-02-24T17:31:30Z (GMT). No. of bitstreams: 1 KanjiBadrudinJ1974.pdf: 425319 bytes, checksum: 171a01adc0e8ae24316f7e9fa41b7883 (MD5) Previous issue date: 1973-07-16

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