'Ray Ruby' Grapefruit Affected by Huanglongbing II. Planting Density, Soil, and Foliar Nutrient Management

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniv Florida-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorPhuyal, Dinesh-
Autor(es): dc.creatorRodrigues Nogueira, Thiago Assis [UNESP]-
Autor(es): dc.creatorJani, Arun D.-
Autor(es): dc.creatorKadyampakeni, Davie M.-
Autor(es): dc.creatorMorgan, Kelly T.-
Autor(es): dc.creatorFerrarezi, Rhuanito Soranz-
Data de aceite: dc.date.accessioned2022-02-22T00:11:45Z-
Data de disponibilização: dc.date.available2022-02-22T00:11:45Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.21273/HORTSCI15255-20-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/197272-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/197272-
Descrição: dc.descriptionSince the arrival of Huanglongbing (HLB) disease in Florida, several management approaches, including modification of orchard architecture design and nutritional therapy, have been explored. High-density plantings anticipate early economic returns from HLB-affected orchards. With no cure available for HLB, balanced nutrient application through soil and foliar spraying can mitigate the disease. A 2-year study was conducted to investigate the effects of three grapefruit (Citrus paradisi) planting densities [single-row (300 and 440 trees per ha), and double-row high-density (975 trees per ha)], two controlled-release fertilizer (CRF) blends, and foliar-applied micronutrients (FAM) (a blend of B, Mn, and Zn at 0, 1.5, 3, and 6 times the recommended rates) on grapefruit growth and fruit yield, physiological parameters, and foliar nutrient concentrations in an HLB-affected orchard. All the trees tested positive for HLB based on real-time quantitative polymerase chain reaction (qPCR) test. The highest planting density resulted in the lowest trunk diameter and canopy volume. Despite lower yield per tree in 2019-20, 975 trees per ha planting induced the greatest fruit and solid yields per ha. Also, the fruit produced from 975 trees per ha planting tended to be acidic with the deposition of more soluble solids. Use of CRF with higher micronutrients increased canopy volume with the expense of reduced fruit number in 2019-20. FAM did not affect cycle threshold (Ct) value and tree growth parameters. Fruit yield, photosynthesis rate, and stomatal conductance (gs) decreased, and all leaf nutrient concentrations except B increased in 2019-20 with all FAM rates tested. In conclusion, our study showed that high-density planting optimizes yield under HLB-endemic conditions. In addition, supplemental soil and foliar micronutrient application do not enhance yield of HLB-affected trees over a 2-year timeframe, warranting further research for confirmation of results.-
Descrição: dc.descriptionUF/IFAS Citrus Initiative-
Descrição: dc.descriptionU.S. Department of Agriculture (USDA)-APHIS-MAC-
Descrição: dc.descriptionUniv Florida, Inst Food & Agr Sci, Indian River Res & Educ Ctr, 2199 South Rock Rd, Ft Pierce, FL 34945 USA-
Descrição: dc.descriptionSao Paulo State Univ, Sch Engn, Dept Plant Protect Rural Engn & Soils, 56 Brasil Sul Ave, BR-15385000 Ilha Solteira, SP, Brazil-
Descrição: dc.descriptionUniv Florida, Citrus Res & Educ Ctr, Inst Food & Agr Sci, 700 Expt Stn Rd, Lake Alfred, FL 33850 USA-
Descrição: dc.descriptionUniv Florida, Southwest Florida Res & Educ Ctr, Inst Food & Agr Sci, 2685 State Rd 29 North, Immokalee, FL 34142 USA-
Descrição: dc.descriptionSao Paulo State Univ, Sch Engn, Dept Plant Protect Rural Engn & Soils, 56 Brasil Sul Ave, BR-15385000 Ilha Solteira, SP, Brazil-
Descrição: dc.descriptionU.S. Department of Agriculture (USDA)-APHIS-MAC: AP19PPQS-
Descrição: dc.descriptionU.S. Department of Agriculture (USDA)-APHIS-MAC: T00C116-
Formato: dc.format1420-1432-
Idioma: dc.languageen-
Publicador: dc.publisherAmer Soc Horticultural Science-
Relação: dc.relationHortscience-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectcitrus greening-
Palavras-chave: dc.subjectfoliar application-
Palavras-chave: dc.subjectfruit quality-
Palavras-chave: dc.subjectfruit yield-
Palavras-chave: dc.subjecthigh-density-
Palavras-chave: dc.subjectmicronutrients-
Título: dc.title'Ray Ruby' Grapefruit Affected by Huanglongbing II. Planting Density, Soil, and Foliar Nutrient Management-
Tipo de arquivo: dc.typelivro digital-
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