Root Characteristics of Perennial Warm-Season Grasslands Managed for Grazing and Biomass Production

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dc.contributor.authorBonin, Catherineen
dc.contributor.authorFlores, Joaoen
dc.contributor.authorLal, Rattanen
dc.contributor.authorTracy, Benjamin F.en
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.date.accessed2014-01-06en
dc.date.accessioned2014-01-15T14:16:33Zen
dc.date.available2014-01-15T14:16:33Zen
dc.date.issued2013-07-08en
dc.description.abstractMinirhizotrons were used to study root growth characteristics in recently established fields dominated by perennial C4-grasses that were managed either for cattle grazing or biomass production for bioenergy in Virginia, USA. Measurements over a 13-month period showed that grazing resulted in smaller total root volumes and root diameters. Under biomass management, root volume was 40% higher (49 vs. 35 mm3) and diameters were 20% larger (0.29 vs. 0.24 mm) compared to grazing. While total root length did not differ between grazed and biomass treatments, root distribution was shallower under grazed areas, with 50% of total root length in the top 7 cm of soil, compared to 41% in ungrazed exclosures. These changes (i.e., longer roots and greater root volume in the top 10 cm of soil under grazing but the reverse at 17-28 cm soil depths) were likely caused by a shift in plant species composition as grazing reduced C4 grass biomass and allowed invasion of annual unsown species. The data suggest that management of perennial C4 grasslands for either grazing or biomass production can affect root growth in different ways and this, in turn, may have implications for the subsequent carbon sequestration potential of these grasslands.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationBonin, Catherine; Flores, Joao; Lal, Rattan; Tracy, Benjamin. Root Characteristics of Perennial Warm-Season Grasslands Managed for Grazing and Biomass Production, Agronomy 2013, 3(3), 508-523; doi:10.3390/agronomy3030508.en
dc.identifier.doihttps://doi.org/10.3390/agronomy3030508en
dc.identifier.issn2073-4395en
dc.identifier.urihttp://hdl.handle.net/10919/24829en
dc.identifier.urlhttp://www.mdpi.com/2073-4395/3/3/508en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectprairie plantsen
dc.subjectminirhizotronen
dc.subjectrootsen
dc.subjectgrazingen
dc.subjectbiofuelsen
dc.titleRoot Characteristics of Perennial Warm-Season Grasslands Managed for Grazing and Biomass Productionen
dc.title.serialAgronomyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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