‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.21273/HORTSCI15128-20 http://hdl.handle.net/11449/221570 |
Resumo: | Since 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. |
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‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient managementSince 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.University of Florida Institute of Food and Agricultural Sciences Indian River Research and Education Center, 2199 South Rock RoadSão Paulo State University School of Engineering Department of Plant Protection Rural Engineering and Soils, 56 Brasil Sul AvenueUniversity of Florida Institute of Food and Agricultural Sciences Citrus Research and Education Center, 700 Experiment Station RoadUniversity of Florida Institute of Food and Agricultural Sciences Southwest Florida Research and Education Center, 2685 State Road 29 NorthSão Paulo State University School of Engineering Department of Plant Protection Rural Engineering and Soils, 56 Brasil Sul AvenueIndian River Research and Education CenterUniversidade Estadual Paulista (UNESP)Citrus Research and Education CenterSouthwest Florida Research and Education CenterPhuyal, DineshNogueira, Thiago Assis Rodrigues [UNESP]Jani, Arun D.Kadyampakeni, Davie M.Morgan, Kelly T.Ferrarezi, Rhuanito Soranz2022-04-28T19:29:24Z2022-04-28T19:29:24Z2020-07-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1420-1432http://dx.doi.org/10.21273/HORTSCI15128-20HortScience, v. 55, n. 9, p. 1420-1432, 2020.2327-98340018-5345http://hdl.handle.net/11449/22157010.21273/HORTSCI15128-202-s2.0-85091573099Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengHortScienceinfo:eu-repo/semantics/openAccess2022-04-28T19:29:24Zoai:repositorio.unesp.br:11449/221570Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:54:33.069506Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management |
title |
‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management |
spellingShingle |
‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management Phuyal, Dinesh |
title_short |
‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management |
title_full |
‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management |
title_fullStr |
‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management |
title_full_unstemmed |
‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management |
title_sort |
‘Ray Ruby’ grapefruit affected by huanglongbing II. Planting density, soil, and foliar nutrient management |
author |
Phuyal, Dinesh |
author_facet |
Phuyal, Dinesh Nogueira, Thiago Assis Rodrigues [UNESP] Jani, Arun D. Kadyampakeni, Davie M. Morgan, Kelly T. Ferrarezi, Rhuanito Soranz |
author_role |
author |
author2 |
Nogueira, Thiago Assis Rodrigues [UNESP] Jani, Arun D. Kadyampakeni, Davie M. Morgan, Kelly T. Ferrarezi, Rhuanito Soranz |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Indian River Research and Education Center Universidade Estadual Paulista (UNESP) Citrus Research and Education Center Southwest Florida Research and Education Center |
dc.contributor.author.fl_str_mv |
Phuyal, Dinesh Nogueira, Thiago Assis Rodrigues [UNESP] Jani, Arun D. Kadyampakeni, Davie M. Morgan, Kelly T. Ferrarezi, Rhuanito Soranz |
description |
Since 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. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-07-27 2022-04-28T19:29:24Z 2022-04-28T19:29:24Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.21273/HORTSCI15128-20 HortScience, v. 55, n. 9, p. 1420-1432, 2020. 2327-9834 0018-5345 http://hdl.handle.net/11449/221570 10.21273/HORTSCI15128-20 2-s2.0-85091573099 |
url |
http://dx.doi.org/10.21273/HORTSCI15128-20 http://hdl.handle.net/11449/221570 |
identifier_str_mv |
HortScience, v. 55, n. 9, p. 1420-1432, 2020. 2327-9834 0018-5345 10.21273/HORTSCI15128-20 2-s2.0-85091573099 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
HortScience |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1420-1432 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808128434584420352 |