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dc.contributor.authorWewalwela, Jayani J.-
dc.contributor.authorTian, Yuan.-
dc.contributor.authorDonaldson, Janet R.-
dc.contributor.authorBaldwin, Brian S.-
dc.contributor.authorVarco, Jac J.-
dc.contributor.authorRushing, Brett-
dc.contributor.authorLu, Haoliang-
dc.contributor.authorWilliams, Mark A.-
dc.date.accessioned2021-10-10T23:05:48Z-
dc.date.available2021-10-10T23:05:48Z-
dc.date.issued2020-
dc.identifier.citationWewalwela, Jayani J., Tian,Yuan. , Donaldson, Janet R., Baldwin, Brian S., Varco, Jac J., Rushing, Brett Lu, Haoliang & Williams, Mark A. (2020). Associative nitrogen fixation linked with three perennial bioenergy grasses in field and greenhouse experiments, GCB Bioenergy, 12,1104–111, https://doi.org. 10.1111/gcbb.12744en_US
dc.identifier.urihttp://archive.cmb.ac.lk:8080/xmlui/handle/70130/6223-
dc.description.abstractAssociative nitrogen (N2)-fixation (ANF) by bacteria in the root-zone of perennial bioenergy grasses has the potential to replace or supplement N fertilizer and sup port sustainable production of biomass, but its application in marginal ecosystems requires further evaluation. In this study, we first combined both greenhouse and field experiments, to explore the N2 fixation effects of three temperate feedstocks Miscanthus × giganteus (giant miscanthus, Freedom), Panicum virgatum (switch grass, Alamo), and Saccharum sp. (energycane, Ho 02-147). In field studies across three growing seasons, plant and soil pools of candidate feedstocks were partially composed of N derived from the atmosphere (Ndfa). Energycane, giant miscanthus, and switchgrass were estimated to derive >30%, %Ndfa. Greenhouse studies were also performed to trace isotopically labeled 15N2 into plant biomass and soil pools. Evidence for Ndfa was detected in all three feedstock grasses (using reference 15N of soil, chicory, and sorghum, δ15N~+7.0). Isotopically labeled 15N2 was traced into biomass (during grass elongation stage) and soil pools. Extrapolation of rates during the 24 hr labeling period to 50 days estimated 30%–55% of plant Ndfa, with the greatest Ndfa for energycane. The findings of the field natural abundance and greenhouse 15N2 feeding experiments provided complementary evidence that peren nial bioenergy grasses have the potential to support relatively high rates of ANF, and accumulate diazotroph-derived N into biomass when grown on non-fertilized soil.en_US
dc.language.isoenen_US
dc.publisherJohn Wiley & Sons Ltden_US
dc.subject15N2en_US
dc.subjectbioenergy grassesen_US
dc.subjectbiomass yielden_US
dc.subjectmarginal soilsen_US
dc.subjectnitrogen fixationen_US
dc.subjectstable isotopeen_US
dc.titleAssociative nitrogen fixation linked with three perennial bioenergy grasses in field and greenhouse experimentsen_US
dc.typeArticleen_US
Appears in Collections:Department of Agricultural Technology

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