Forage Mass Estimation in Silvopastoral and Full Sun Systems: Evaluation through Proximal Remote Sensing Applied to the SAFER Model

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dc.contributor.authorLuns Hatum de Almeida, Samira [UNESP]
dc.contributor.authorBrunno Costa Souza, Jarlyson [UNESP]
dc.contributor.authorFurlan Nogueira, Sandra
dc.contributor.authorRicardo Macedo Pezzopane, José
dc.contributor.authorHeriberto de Castro Teixeira, Antônio
dc.contributor.authorBosi, Cristiam
dc.contributor.authorAdami, Marcos
dc.contributor.authorZerbato, Cristiano [UNESP]
dc.contributor.authorCarlos de Campos Bernardi, Alberto
dc.contributor.authorBayma, Gustavo
dc.contributor.authorPereira da Silva, Rouverson [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Federal de Sergipe (UFS)
dc.contributor.institutionNational Institute for Space Research (INPE)
dc.date.accessioned2023-07-29T16:05:31Z
dc.date.available2023-07-29T16:05:31Z
dc.date.issued2023-02-01
dc.description.abstractThe operational slowness in the execution of direct methods for estimating forage mass, an important variable for defining the animal stocking rate, gave rise to the need for methods with faster responses and greater territorial coverage. In this context, the aim of this study was to evaluate a method to estimate the mass of Urochloa brizantha cv. BRS Piatã in shaded and full sun systems, through proximal sensing applied to the Simple Algorithm for Evapotranspiration Retrieving (SAFER) model, applied with the Monteith Radiation Use Efficiency (RUE) model. The study was carried out in the experimental area of Fazenda Canchim, a research center of Embrapa Pecuária Sudeste, São Carlos, SP, Brazil (21°57′S, 47°50′W, 860 m), with collections of forage mass and reflectance in the silvopastoral systems animal production and full sun. Reflectance data, as well as meteorological data obtained by a weather station installed in the study area, were used as input for the SAFER model and, later, for the radiation use efficiency model to calculate the fresh mass of forage. The forage collected in the field was sent to the laboratory, separated, weighed and dried, generating the variables of pasture total dry mass), total leaf dry mass, leaf and stalk dry mass and leaf area index. With the variables of pasture, in situ, and fresh mass, obtained from SAFER, the training regression model, in which 80% were used for training and 20% for testing the models. The SAFER was able to promisingly express the behavior of forage variables, with a significant correlation with all of them. The variables that obtained the best estimation performance model were the dry mass of leaves and stems and the dry mass of leaves in silvopastoral and full sun systems, respectively. It was concluded that the association of the SAFER model with the proximal sensor allowed us to obtain a fast, precise and accurate forage estimation method.en
dc.description.affiliationDepartment of Engineering and Mathematical Sciences São Paulo State University (Unesp), SP
dc.description.affiliationBrazilian Agricultural Research Corporation Embrapa Environment, SP
dc.description.affiliationBrazilian Agricultural Research Corporation Embrapa Southeast Livestock, SP
dc.description.affiliationWater Resources Program (PRORH) Federal University of Sergipe (UFS), SE
dc.description.affiliationAmazon Spatial Coordination National Institute for Space Research (INPE), SP
dc.description.affiliationUnespDepartment of Engineering and Mathematical Sciences São Paulo State University (Unesp), SP
dc.identifierhttp://dx.doi.org/10.3390/rs15030815
dc.identifier.citationRemote Sensing, v. 15, n. 3, 2023.
dc.identifier.doi10.3390/rs15030815
dc.identifier.issn2072-4292
dc.identifier.scopus2-s2.0-85147945246
dc.identifier.urihttp://hdl.handle.net/11449/249651
dc.language.isoeng
dc.relation.ispartofRemote Sensing
dc.sourceScopus
dc.subjectdigital agriculture
dc.subjectmeteorological data
dc.subjectproximal sensor
dc.subjectUrochloa brizantha
dc.titleForage Mass Estimation in Silvopastoral and Full Sun Systems: Evaluation through Proximal Remote Sensing Applied to the SAFER Modelen
dc.typeArtigo
unesp.author.orcid0000-0001-6547-7297[3]
unesp.author.orcid0000-0001-5462-6090[4]
unesp.author.orcid0000-0001-8318-6477[6]
unesp.author.orcid0000-0003-4247-4477[7]
unesp.author.orcid0000-0001-5312-6609[10]
unesp.author.orcid0000-0001-8852-2548[11]

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Artigos - Engenharia Rural - FCAV