Overseeding aeschynomene and N fertilization effects on forage characteristics, N fixation, and N2O-N emissions of bahiagrass pastures

Página do item simplificado
dc.contributor.authorGarzon, Jaime
dc.contributor.authorVendramini, Joao M. B.
dc.contributor.authorSilveira, Maria L.
dc.contributor.authorDubeux, Jose Carlos B.
dc.contributor.authorLiao, Hui-Ling
dc.contributor.authorSollenberger, Lynn E.
dc.contributor.authorda Silva, Hiran M. S.
dc.contributor.authorGomes, Vinicius C. [UNESP]
dc.contributor.authorde Oliveira, Hugo M. R.
dc.contributor.institutionUniversity of Maine
dc.contributor.institutionUniversity of Florida
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionFederal University of North Tocantins
dc.date.accessioned2023-07-29T13:19:17Z
dc.date.available2023-07-29T13:19:17Z
dc.date.issued2023-01-01
dc.description.abstractAeschynomene (Aeschynomene americana L.) is a warm-season annual legume forage used in tropical and subtropical regions; however, there is limited information on agronomic and environmental benefits of aeschynomene when overseeded into bahiagrass (Paspalum notatum Flüggé) swards. The objective of this study was to evaluate the effects of overseeding aeschynomene or applying N fertilizer to existing bahiagrass on forage characteristics, atmospheric N fixation, and N2O-N emissions. The study was conducted in Ona, FL, from April 2019 to March 2021. Treatments were the split-plot arrangement of bahiagrass-aeschynomene or bahiagrass monoculture (main plot) and N fertilization level (0 or 60 kg N ha−1; subplot), distributed in a randomized complete block design with four replicates. Nitrogen fixation was estimated in plots receiving no N fertilization. The static chamber technique was used to estimate N2O-N emissions. Overseeding aeschynomene did not increase forage accumulation (mean = 1300 kg dry matter [DM] ha−1 harvest−1) or N2O emissions (mean = 15 g N2O-N ha−1 per day), but increased forage crude protein (CP) concentration (from 98 to 108 g kg−1) when compared to bahiagrass monoculture. Nitrogen fertilization increased forage accumulation (from 1200 to 1400 kg DM ha−1 per harvest) but it did not affect aeschynomene N fixation (84% N derived from atmospheric fixation [Ndfa]). Nitrous oxide emissions had significant temporal variability across all treatments; however, there were no differences in accumulated N2O-N emissions among treatments (mean = 2.4 kg N2O-N ha−1 per year). Overseeding aeschynomene is an effective management practice to increase forage CP concentration in pastures without increasing N2O-N emissions.en
dc.description.affiliationCooperative of Extension University of Maine
dc.description.affiliationRange Cattle Research and Education Center University of Florida
dc.description.affiliationNorth Florida Research and Education Center University of Florida
dc.description.affiliationAgronomy Department University of Florida
dc.description.affiliationDepartment of Animal Breeding and Nutrition Sao Paulo State University, São Paulo
dc.description.affiliationDepartment of Animal Sciences Federal University of North Tocantins, Tocantins
dc.description.affiliationUnespDepartment of Animal Breeding and Nutrition Sao Paulo State University, São Paulo
dc.identifierhttp://dx.doi.org/10.1002/csc2.20981
dc.identifier.citationCrop Science.
dc.identifier.doi10.1002/csc2.20981
dc.identifier.issn1435-0653
dc.identifier.issn0011-183X
dc.identifier.scopus2-s2.0-85161467779
dc.identifier.urihttp://hdl.handle.net/11449/247554
dc.language.isoeng
dc.relation.ispartofCrop Science
dc.sourceScopus
dc.titleOverseeding aeschynomene and N fertilization effects on forage characteristics, N fixation, and N2O-N emissions of bahiagrass pasturesen
dc.typeArtigo
unesp.author.orcid0000-0003-3383-1620[2]
unesp.author.orcid0000-0001-8269-9959[4]
unesp.author.orcid0000-0001-7944-2749[6]
unesp.author.orcid0000-0002-2166-4426[9]

Arquivos

Coleções

Artigos