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dc.contributor.authorVAZ, C. M. P.
dc.contributor.authorFRANCHINI, J. C.
dc.contributor.authorSPERANZA, E. A.
dc.contributor.authorINAMASU, R. Y.
dc.contributor.authorJORGE, L. A. de C.
dc.contributor.authorRABELLO, L. M.
dc.contributor.authorLOPES, I. de O. N.
dc.contributor.authorCHAGAS, S. das
dc.contributor.authorSOUZA, J. L. R. de
dc.contributor.authorSOUZA, M. de
dc.contributor.authorPIRES, A.
dc.contributor.authorSCHEPERS, J.
dc.date.accessioned2023-04-20T19:53:01Z-
dc.date.available2023-04-20T19:53:01Z-
dc.date.created2023-04-20
dc.date.issued2023
dc.identifier.citationJournal of Cotton Science, v. 27, n. 2, p. 60-73, 2023.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1153295-
dc.descriptionVariable-rate application has great potential to reduce variability and increase yield by spatially optimizing agricultural inputs. In cotton, plant growth regulators (PGRs) control excessive growth and provide suitable plant height for harvest operations. This study evaluates the effectof variable-rate PGR application compared toconstant-rate application to reduce yield spatialvariability and increase yield. The variable-rate approach was carried out in 2020 based on zonalapplications defined by clustering analysis using soil electrical conductivity, vegetation indexes,and yield maps. Application doses and timingswere determined by integrating plant heightmeasurements for the whole field in 2019 and byzone in 2020. To compare the two procedures, cultivar and plant populations were kept constant;fertilization and accumulated rain were similarin both seasons. A reduction in yield spatial variability due to the zonal application was observed,with yield coefficient of variation (CV) decreasing from 18% in 2019 to 12% in 2020. Spatial andtemporal analysis of Normalized Difference Veg-etation Index satellite images showed higher CVvalues in 2019 (constant-rate) reaching 30% at theend of the season, whereas in 2020 (variable-rate)CV was constant (approximately 10%). Cotton
dc.language.isoeng
dc.rightsopenAccess
dc.subjectCrescimento de planta
dc.subjectReguladores de crescimento de planta
dc.subjectVariabilidade espacial
dc.subjectImagem de satélite
dc.subjectSéries temporais de NDVI
dc.subjectPlant growth regulator
dc.subjectSpatial variability
dc.subjectSatellite images
dc.subjectNDVI Temporal Series
dc.titleZonal application of plant growth regulator in cotton to reduce variability and increase yield in a highly variable field.
dc.typeArtigo de periódico
dc.subject.thesagroAlgodão
dc.subject.thesagroAgricultura
dc.subject.nalthesaurusAgriculture
dc.subject.nalthesaurusCotton
dc.subject.nalthesaurusPlant growth
dc.subject.nalthesaurusPlant growth control
dc.subject.nalthesaurusYields
dc.subject.nalthesaurusVariable rate application
dc.subject.nalthesaurusVariability
dc.subject.nalthesaurusNormalized difference vegetation index
dc.format.extent260-73eng
riaa.ainfo.id1153295
riaa.ainfo.lastupdate2023-04-20
dc.identifier.doi10.56454/MIUC6583
dc.contributor.institutionCARLOS MANOEL PEDRO VAZ, CNPDIA; JULIO CEZAR FRANCHINI DOS SANTOS, CNPSO; EDUARDO ANTONIO SPERANZA, CNPTIA; RICARDO YASSUSHI INAMASU, CNPDIA; LUCIO ANDRE DE CASTRO JORGE, CNPDIA; LADISLAU MARCELINO RABELLO, CNPDIA; IVANI DE OLIVEIRA NEGRAO LOPES, CNPSO; SÉRGIO DAS CHAGAS, GRUPO AMAGGI; JEFFERSON L. R. DE SOUZA, GRUPO AMAGGI; MÁRCIO DE SOUZA, INSTITUTO MATO-GROSSENSE DO ALGODÃO; AMANDIO PIRES, INSTITUTO MATO-GROSSENSE DO ALGODÃO; JAMES SCHEPERS, UNIVERSITY OF NEBRASKA.
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