Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels

Persistent Link:
http://hdl.handle.net/10150/277231
Title:
Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels
Author:
Zhou, Maoqian, 1961-
Issue Date:
1989
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The growth and Nitrogen fixation by one low salt tolerant alfalfa (Medicago sativa L.) and two germination salt tolerant selections inoculated with were investigated at two salt levels (0, -0.6 Mpa) and two N rates (1, 5ppm) using a system which automatically recirculates a nutrient solution. The high level of salinity (-0.6 Mpa osmotic potential of culture solution) resulted in substantial reduction in the N fixation percentage and total fixed N. The effect of salinity was more pronounced for later cuttings than for the earlier cutting. The N fixation percentages were substantially decreased by increasing N level and the reduction was enhanced by time. The N treatment levels did not exhibit a significant effect on total fixed N. Cultivars did not differ in either growth or N fixation. However, the interaction of N and salinity significantly decreased the percentage and amount of N fixation.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Alfalfa -- Growth.; Plants -- Effect of nitrogen on.; Nitrogen -- Fixation.; Plants -- Effect of salts on.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Soil and Water Science
Degree Grantor:
University of Arizona
Advisor:
Tucker, Thomas C.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleNitrogen fixation by alfalfa as affected by salt stress and nitrogen levelsen_US
dc.creatorZhou, Maoqian, 1961-en_US
dc.contributor.authorZhou, Maoqian, 1961-en_US
dc.date.issued1989en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe growth and Nitrogen fixation by one low salt tolerant alfalfa (Medicago sativa L.) and two germination salt tolerant selections inoculated with were investigated at two salt levels (0, -0.6 Mpa) and two N rates (1, 5ppm) using a system which automatically recirculates a nutrient solution. The high level of salinity (-0.6 Mpa osmotic potential of culture solution) resulted in substantial reduction in the N fixation percentage and total fixed N. The effect of salinity was more pronounced for later cuttings than for the earlier cutting. The N fixation percentages were substantially decreased by increasing N level and the reduction was enhanced by time. The N treatment levels did not exhibit a significant effect on total fixed N. Cultivars did not differ in either growth or N fixation. However, the interaction of N and salinity significantly decreased the percentage and amount of N fixation.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectAlfalfa -- Growth.en_US
dc.subjectPlants -- Effect of nitrogen on.en_US
dc.subjectNitrogen -- Fixation.en_US
dc.subjectPlants -- Effect of salts on.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineSoil and Water Scienceen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorTucker, Thomas C.en_US
dc.identifier.proquest1339241en_US
dc.identifier.oclc24021905en_US
dc.identifier.bibrecord.b17721039en_US
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