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dc.contributor.advisorRoundy, Bruce A.en_US
dc.contributor.authorSumrall, Lee Bradford, 1962-*
dc.creatorSumrall, Lee Bradford, 1962-en_US
dc.date.accessioned2013-03-28T10:37:18Z
dc.date.available2013-03-28T10:37:18Z
dc.date.issued1990en_US
dc.identifier.urihttp://hdl.handle.net/10150/277328
dc.description.abstractLehmann lovegrass (Eragrostis lehmanniana Nees) is a warm-season bunchgrass native to South Africa which dominates many desert grasslands in southern Arizona. To determine why fire results in high seedling recruitment of this species, seedbank germination and field seedling emergence were measured in relation to (1) no treatment, (2) burning, (3) clipping and herbicide and (4) herbicide only. Treatments were replicated over 2 years on a stand of Lehmann lovegrass at the Santa Rita Experimental Range. Canopy removal, by either clipping or burning, significantly increased seedling emergence in seedbank bioassays prior to summer rains both years. Bioassay emergence was 826, 415, 350 and 199 seedling/m2 in 1988 from the dead-clip, burn, dead-standing and control treatments, respectively. Field seedling emergence was significantly increased with canopy removal both years and seedling densities were 281, 142, 3, and 0.1 seedlings/m2 for the dead-clip, burn, dead-standing and control treatments, respectively in 1988. The ability of this grass to reestablish after canopy disturbance may result from a greater range in sol temperatures and increases in red light reaching the seedbed.
dc.language.isoen_USen_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.subjectAgriculture, Range Management.en_US
dc.titleSeedbed ecology and emergence of Lehmann lovegrass (Eragrostis lehmanniana Nees) as influenced by burningen_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
dc.identifier.proquest1341239en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.nameM.S.en_US
dc.identifier.bibrecord.b26330945en_US
refterms.dateFOA2018-07-16T00:50:36Z
html.description.abstractLehmann lovegrass (Eragrostis lehmanniana Nees) is a warm-season bunchgrass native to South Africa which dominates many desert grasslands in southern Arizona. To determine why fire results in high seedling recruitment of this species, seedbank germination and field seedling emergence were measured in relation to (1) no treatment, (2) burning, (3) clipping and herbicide and (4) herbicide only. Treatments were replicated over 2 years on a stand of Lehmann lovegrass at the Santa Rita Experimental Range. Canopy removal, by either clipping or burning, significantly increased seedling emergence in seedbank bioassays prior to summer rains both years. Bioassay emergence was 826, 415, 350 and 199 seedling/m2 in 1988 from the dead-clip, burn, dead-standing and control treatments, respectively. Field seedling emergence was significantly increased with canopy removal both years and seedling densities were 281, 142, 3, and 0.1 seedlings/m2 for the dead-clip, burn, dead-standing and control treatments, respectively in 1988. The ability of this grass to reestablish after canopy disturbance may result from a greater range in sol temperatures and increases in red light reaching the seedbed.


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