Data/hora: 05/07/2024 21:19:45

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	06/09/2011	
Data da última atualização: 	06/09/2011	
Autoria: 	ARGENTA, L. C.; NAVA, G.; SCOLARO, A. M. T.; AMARANTE, C. V. T.; ERNANI, P. R.	
Afiliação: 	Epagri	
Título: 	Maturity and quality of 'Gala' and 'Fuji' apples from trees differently fertilized with boron.	
Ano de publicação: 	2011	
Fonte/Imprenta: 	In: INTERNATIONAL SOCIETY FOR HORTICULTURAL SCIENCE POSTHARVEST, 4., 2011, Leavenworth. [Proceedings...]. Leavenworth: ISHS, 2011. p. 89-89.	
Idioma: 	Inglês
Português	
Conteúdo: 	Apple trees have high demand for boron (B), which is important for pollen germination, pollen tube growth, fruit set, root growth and yield. This study evaluated the effect of B fertilization, either to the soil or as spray to apple trees grown on shallow soils (Haplumbrept) on fruit maturity and quality at harvest and after storage. The study was carried out from 2002 to 2009 in a commercial orchard of ?Imperial Gala? and ?Fuji Suprema? apple trees, in São Joaquim, Southern Brazil. Both cultivars were grafted on Marubakaido rootstock (with M-9 inter-stem) and planted in 1999. Treatments consisted of a 3 x 3 factorial combination involving time of B (boric acid) foliar spray application and rates of B (borax) added to the soil. Boric acid was sprayed on the tree at the pink bud stage, at concentration of 0.3%, or just after fruit harvest at concentration of 0.6%. Borax was applied to the soil every two years, in a 2.0-m-wide strip in the tree row at winter time, starting in 2002, at rates of 2.5 or 5.0 kg ha-1. Both factors had a control, with no B addition. In each year, from 2005 to 2009, fruits of all treatments were harvested at the same day, predicted as the ideal for long-term storage based on the control trees. Fruit maturity and quality were evaluated at harvest and after long-term storage. Fruit of both cultivars were stored at 0.5oC in regular air and in controlled atmosphere with 1.8 kPa O2 and 2.0 kPa CO2. Boron fertilization enhanced fruit firmness and acidity losses and starch degradation while on the tree. Reduction of fruit firmness and acidity with B fertilization were more evident after storage than at harvest and greater in ?Imperial Gala? than in ?Fuji Suprema?. In addition, high doses of acid boric and/or borax enhanced the development of internal browning in ?Imperial Gala?. Largest effects of B on fruit quality were detected after the 6th year of fertilization and when supplied as acid boric spray at the pink bud stage in combination with borax added to the soil. Fruit size, color and soluble solids (in both cultivars) and the development of CO2 injury and superficial scald (in ?Fuji Suprema?) were minor or not consistently and significantly affected by the B treatments. The results indicated the potential negative effects of B fertilization in excess on apple fruit quality, especially after storage for ?Imperial Gala?.	
Palavras-Chave: 	Fruit firmness; Malus x domestica; Physiological disorder; Storage.	
Categoria do assunto: 	--	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_6893.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
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