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

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 hi...

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Bibliographic Details
Main Author:	Zhou, Maoqian, 1961-
Other Authors:	Tucker, Thomas C.
Language:	en_US
Published:	The University of Arizona. 1989
Subjects:	Alfalfa > Growth. Plants > Effect of nitrogen on. Nitrogen > Fixation. Plants > Effect of salts on.
Online Access:	http://hdl.handle.net/10150/277231

id	ndltd-arizona.edu-oai-arizona.openrepository.com-10150-277231
record_format	oai_dc
spelling	ndltd-arizona.edu-oai-arizona.openrepository.com-10150-2772312015-10-23T05:03:05Z Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels Zhou, Maoqian, 1961- Tucker, Thomas C. Alfalfa -- Growth. Plants -- Effect of nitrogen on. Nitrogen -- Fixation. Plants -- Effect of salts on. 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. 1989 text Thesis-Reproduction (electronic) http://hdl.handle.net/10150/277231 24021905 1339241 .b17721039 en_US 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. The University of Arizona.
collection	NDLTD
language	en_US
sources	NDLTD
topic	Alfalfa -- Growth. Plants -- Effect of nitrogen on. Nitrogen -- Fixation. Plants -- Effect of salts on.
spellingShingle	Alfalfa -- Growth. Plants -- Effect of nitrogen on. Nitrogen -- Fixation. Plants -- Effect of salts on. Zhou, Maoqian, 1961- Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels
description	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.
author2	Tucker, Thomas C.
author_facet	Tucker, Thomas C. Zhou, Maoqian, 1961-
author	Zhou, Maoqian, 1961-
author_sort	Zhou, Maoqian, 1961-
title	Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels
title_short	Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels
title_full	Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels
title_fullStr	Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels
title_full_unstemmed	Nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels
title_sort	nitrogen fixation by alfalfa as affected by salt stress and nitrogen levels
publisher	The University of Arizona.
publishDate	1989
url	http://hdl.handle.net/10150/277231
work_keys_str_mv	AT zhoumaoqian1961 nitrogenfixationbyalfalfaasaffectedbysaltstressandnitrogenlevels
_version_	1718102465284407296

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

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