SBICafé
Biblioteca do Café

Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels

Show simple item record

dc.contributor.author Costa, Jéfferson de Oliveira
dc.contributor.author Coelho, Rubens Duarte
dc.contributor.author Barros, Timóteo Herculino da Silva
dc.contributor.author Fraga Junior, Eusímio Felisbino
dc.contributor.author Fernandes, André Luís Teixeira
dc.date.accessioned 2021-12-02T01:00:48Z
dc.date.available 2021-12-02T01:00:48Z
dc.date.issued 2019
dc.identifier.citation COSTA, J. O. et al. Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels. Acta Scientiarum. Agronomy, Maringá, v. 41, p. 1-8. 2019. pt_BR
dc.identifier.issn 1807-8621
dc.identifier.uri http://dx.doi.org/10.4025/actasciagron.v41i1.42703 pt_BR
dc.identifier.uri http://www.sbicafe.ufv.br/handle/123456789/12851
dc.description.abstract The leaf area index (LAI) is relevant in studies of phenomena at different scales, such as for the leaf to canopy scale and the calculation of the extinction coefficient of photosynthetically active radiation (kPAR), providing input for the parameterization of physiological basis models. The objective of this work was to verify the variation of the LAI and the coffee kPAR subjected to different drip irrigation levels (130, 100, 70, and 40%) and to compare the data obtained from radiation bar linear sensors (SunScan) in the plants that received full irrigation with the values found by other LAI estimation methodologies. The study was conducted in Piracicaba, São Paulo State, Brazil, using the species Coffea arabica cv. Red Catuaí IAC 144; a drip irrigation system was adopted, with the irrigation controlled by tensiometry. The mean LAI values were higher in the L130 (irrigation level of 130%) and L100 (irrigation level of 100%) treatments than those with deficit irrigation depths. The mean kPAR values were lower for the L130 and L100 treatments than the values found in the deficit irrigation depth treatments. When comparing SunScan to other methodologies, the mean error (ME) and absolute mean error (AME) were high. pt_BR
dc.format pdf pt_BR
dc.language.iso en pt_BR
dc.publisher Editora da Universidade Estadual de Maringá - EDUEM pt_BR
dc.relation.ispartofseries Acta Scientiarum. Agronomy;v.41, 2019
dc.rights Open Access pt_BR
dc.subject Coffea arabica pt_BR
dc.subject LAI pt_BR
dc.subject SunScan pt_BR
dc.subject Water deficit pt_BR
dc.subject.classification Cafeicultura::Agroclimatologia e fisiologia pt_BR
dc.title Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels pt_BR
dc.type Artigo pt_BR

Files in this item

Files Size Format View
Rev. Acta Scientiarium_v. 41_p. 01 - 08_2019.pdf 739.5Kb application/pdf View/Open ou Pre-visualizar

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Sobre o SBICafé

Browse

My Account