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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Univ Florida | - |
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.creator | Phuyal, Dinesh | - |
Autor(es): dc.creator | Rodrigues Nogueira, Thiago Assis [UNESP] | - |
Autor(es): dc.creator | Jani, Arun D. | - |
Autor(es): dc.creator | Kadyampakeni, Davie M. | - |
Autor(es): dc.creator | Morgan, Kelly T. | - |
Autor(es): dc.creator | Ferrarezi, Rhuanito Soranz | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:11:45Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:11:45Z | - |
Data de envio: dc.date.issued | 2020-12-09 | - |
Data de envio: dc.date.issued | 2020-12-09 | - |
Data de envio: dc.date.issued | 2020-09-01 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.21273/HORTSCI15111-20 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/197271 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/197271 | - |
Descrição: dc.description | Huanglongbing (HLB), or citrus greening disease, affects practically all fruitbearing trees in commercial citrus orchards in Florida with no cure identified yet. High-density plantings and enhanced nutritional programs such as application of controlled-release fertilizer (CRF) with higher micronutrient levels can mitigate disease symptoms and extend the tree life span of sweet oranges (Citrus sinensis). The objective of this study was to evaluate the effects of tree planting density and application of CRF blends differing in N to K ratio and micronutrient content on grapefruit (Citrus paradise) plant health, canopy volume, fruit yield, and fruit quality in an HLB-affected orchard. A study was conducted in Florida for two growing seasons (2017-18 and 2018-19) to evaluate the response of 'Ray Ruby' grapefruit on Kuharske citrange (Citrus sinensis X Poncirus trifoliata) to three planting densities (300, 440, and 975 trees per ha) and two CRF blends [12 nitrogen (N)-1.31 phosphorus (P)-7.47 potassium (K) and 16N-1.31P-16.6K1 with different nutrient sources and composition. According to quantitative real-time polymerase chain reaction testing, all sampled trees tested positive for Candidatus Liberibacter asiaticus, the pathogen associated with HLB. Trees planted at 975 trees per ha had 33% lower canopy volume per tree but 160% greater fruit yield per hectare and 190% higher yield of solids compared with 300 trees per ha. Fruit produced in high-density planting (975 trees per ha) was 18% more acidic with higher soluble solid compared with low-density planting (300 trees per ha). The use of a CRF blend with higher amounts of micronutrients along with lower K increased canopy volume in both seasons and resulted in 24% and 29% reduction in fruit yield per hectare and yield of solids, respectively, in 2017-18. Our results indicate that high-density plantings increase fruit yield per area, and regardless of the N to K ratio, the use of CRF blends supplemented with micronutrients may not increase fruit yield in HLB-affected grapefruit. | - |
Descrição: dc.description | UF/IFAS Citrus Initiative | - |
Descrição: dc.description | Univ Florida, Inst Food & Agr Sci, Indian River Res & Educ Ctr, 2199 South Rock Rd, Ft Pierce, FL 34945 USA | - |
Descrição: dc.description | Sao Paulo State Univ, Sch Engn, Dept Plant Protect Rural Engn & Soils, 56 Brasil Ave, BR-15385000 Ilha Solteira, SP, Brazil | - |
Descrição: dc.description | Univ Florida, Citrus Res & Educ Ctr, Inst Food & Agr Sci, 700 Expt Stn Rd, Lake Alfred, FL 33850 USA | - |
Descrição: dc.description | Univ Florida, Southwest Florida Res & Educ Ctr, Inst Food & Agr Sci, 2685 State Rd 29 North, Immokalee, FL 34142 USA | - |
Descrição: dc.description | Sao Paulo State Univ, Sch Engn, Dept Plant Protect Rural Engn & Soils, 56 Brasil Ave, BR-15385000 Ilha Solteira, SP, Brazil | - |
Formato: dc.format | 1411-1419 | - |
Idioma: dc.language | en | - |
Publicador: dc.publisher | Amer Soc Horticultural Science | - |
Relação: dc.relation | Hortscience | - |
???dc.source???: dc.source | Web of Science | - |
Palavras-chave: dc.subject | controlled-release fertilizer | - |
Palavras-chave: dc.subject | fruit quality | - |
Palavras-chave: dc.subject | fruit yield | - |
Palavras-chave: dc.subject | planting spacing | - |
Palavras-chave: dc.subject | tree health | - |
Título: dc.title | 'Ray Ruby' Grapefruit Affected by Huanglongbing I. Planting Density and Soil Nutrient Management | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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