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United States Department of Agriculture

Agricultural Research Service

Research Project: SOIL MANAGEMENT FOR SUSTAINABLE AGRICULTURAL SYSTEMS THAT PREVENT WIND EROSION AND ENHANCE THE ENVIRONMENT Title: Sand abrasion injury and biomass partitioning in cotton seedlings

Authors
item Baker, Jeff
item Ephrath, Jhonathan -
item McMichael, Bobbie
item Burke, John
item Gitz, Dennis
item Lascano, Robert

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: March 1, 2010
Publication Date: November 11, 2010
Citation: Baker, J.T., Ephrath, J., Mcmichael, B.L., Burke, J.J., Gitz, D.C., Lascano, R.J. 2010. Sand abrasion injury and biomass partitioning in cotton seedlings[abstract]. 3rd International Conference on Deserts, Drylands, and Desertification. November 8-11, 2011, Sede Boqer, Israel.

Technical Abstract: Wind blown soil particle abrasion negatively impacts millions of hectares of crops annually. The goal of this study was to examine the effects of wind and wind blown sand abrasion damage on cotton (Gossypium hirsutum L.) seedling biomass partitioning to leaves, stems, and roots. Seedlings of three cotton cultivars were exposed to no wind (untreated controls) or sand abrasive flux densities of 0, 0.1, 0.25, 0.35 and 0.5 g cm-1 width s-1 at a wind velocity of 13.4 m s-1 in a suction-type laboratory wind tunnel. Plants were destructively sampled at the time of the sand abrasion treatment and also at approximately 2 and 4 weeks after exposure. These three sampling dates provided two time intervals for assessing the amount of plant damage and re-growth using classical growth analysis. With increasing sand abrasive flux density, whole plant, leaf, stem, and root biomass as well as leaf area were all reduced in both harvest intervals (P = 0.05). Although small significant differences in leaf area ratio (LAR) were found among cultivars and sand abrasion treatments, net assimilation rate (NAR) accounted for 96 and 75% of the variability in relative growth rate (RGR) in the first and second harvest intervals, respectively. Increasing plant damage caused by sand abrasion treatment resulted in preferential biomass partitioning to the damaged stems rather than roots during the first harvest interval while a much more stable allometric allocation of biomass among plant organs was observed in the second harvest interval.

Last Modified: 10/23/2014
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