Aplicação de ethephon no raleio químico de ameixeira e seu efeito sobre a produtividade

Pavanello, Alexandre Pozzobom; Ayub, Ricardo Antônio

doi:10.1590/s0100-29452012000100040

Cited by 16 publications

(15 citation statements)

References 8 publications

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“…Another management practice used to optimize fruit size and quality is thinning. The manner in which is carried out (manual or chemical), stages (during or after flowering), intensity and specific parts of the fruit, resulted from fruit thinning, particularizing results of such practice in production and fruit quality (Pavanello & Ayub, 2012).…”

Section: Introductionmentioning

confidence: 99%

Influence of the main stem pruning and fruit thinning on quality of melon

et al. 2016

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RESUMO Influence of the main stem pruning and fruit thinning on quality of melon 1Among many management practices used in melon crops, those that change source: sink relationship, such as pruning and fruit thinning, directly influence production, affect fruit size and its composition, including sugar and vitamin contents. The objective of this study was to evaluate the influence of pruning of the main stem and time of fruit thinning in melon postharvest quality. Thus, two experiments were set up in Mossoró, state of Rio Grande do Norte, each with a melon hybrid (Amaregal and Banzai). Each experiment was conducted in a randomized block, in a (2 x 4) + 1 factorial design, 2 pruning management (with and without pruning), 4 levels of fruit thinning (3, 6, 9 and 12 DARB -days after removal agro textile blanket) and a control (without pruning and thinning), and four replications. Fruits were harvested at commercial maturity and transported to the Laboratory of Food Technology of UFERSA, where they were evaluated for the following characteristics: weight, diameter, length, flesh thickness, flesh firmness, soluble solids, pH, and titratable acidity, soluble solids: titratable acidity ratio and vitamin C. No interaction between factors in any of the experiments was found. Titratable acidity (0.077%) and vitamin C content (3.4 mg/100 g) in Amaregal melon and soluble solids (10.2%) in Banzai melon were lower in the treatments with stem pruning. In Amaregal melon, fruits showed longer length (134 mm) and greater flesh firmness (40 N) when thinning was carried out on 6 DARB, and as thinning was delayed, it found a decrease in the values of soluble solids, SS: TA ratio and pH. In Banzai melon, fruits showed greater flesh thickness (33.5 mm) and SS: TA (247.5) ratio when thinning was carried out on 6 DARB. However, delay in thinning promoted an increase in pH and vitamin C content of the fruits. Pruning of the main stem and thinning season had effect on the quality of Amaregal and Banzai melons in different ways.Dentre as diversas práticas culturais utilizadas no meloeiro, aquelas que alteram a relação fonte: dreno, como poda de hastes e raleio de frutos, influenciam diretamente na produção, afetam o tamanho dos frutos e sua composição, incluindo os teores de açúcares e vitaminas. Objetivou-se, com este trabalho, avaliar a influência da poda da haste principal e da época de realização do raleio de frutos na qualidade pós-colheita de melão. Para isto, dois experimentos foram implantados no município de Mossoró-RN, cada um com um híbrido (Amaregal e Banzai). Cada experimento foi conduzido em blocos ao acaso, com esquema fatorial (2 x 4) + 1, sendo 2 níveis do fator poda (sem poda e com poda), 4 níveis do fator raleio (3, 6, 9 e 12 DARM -dias após a retirada da manta agrotêxtil) e uma testemunha (sem poda e sem raleio), e quatro blocos. Os frutos foram colhidos na maturidade comercial e transportados para o Laboratório de 790 Rafaella Martins de Araújo Ferreira et al.

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Section: Introductionmentioning

confidence: 99%

Influence of the main stem pruning and fruit thinning on quality of melon

et al. 2016

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“…Fruits with a diameter greater than 44 mm are accepted for commercialization AYUB, 2012;AHRENS et al, 2014). The increase in the plum diameter was proportional to the increase of ATS concentrations, due to the reduction of the excess fruit produced in the accesses, as observed under the mechanical (HEHNEN et al, 2012) and chemical thinning (PAVANELLO, AYUB, 2012, PAVANELLO;ZOTH;AYUB, 2018). The composition of the ATS has a fertilizing effect, mainly having nutrients such as sulfur and nitrogen (FERNANDES, 2010), which when applied to flowering causes an increase in apple diameter of 10 to 12 mm (MAAS, 2007).…”

Section: Resultsmentioning

confidence: 99%

“…The physical analysis of diameter (mm), fruit fresh mass (FM) (g), firmness (N), soluble solids (SS) (ºBrix), titratable acidity (AT) (% malic acid), ratio (SS/ AT), pH and plant production (PP) were based upon the methodology proposed by Pavanello and Ayub (2012). The experimental data were submitted to a polynomial regression analysis (data not shown herein) and the treatment means were compared by the Tukey test at 5% reliability by means of SISVAR 5.6 program (FERREIRA, 2014).…”

Section: Methodsmentioning

confidence: 99%

Ammonia thiosulfate in Japanese plum tree thinning

et al. 2019

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In order to test the use of ammonia thiosulfate (ATS) in the chemical thinning of the Japanese plum tree, a field experiment was conducted throughout the 2015/2016 and 2016/2017 crop growing seasons at Ponta Grossa, PR, Brazil. The experimental design adopted herein was a randomized block design (RBD). During the 2015/2016 season, the trial was comprised of two accesses and six treatments, such as T1 (control); T2 (ATS 4%); T3 (ATS 5%); T4 (ATS 6%); T5 (ATS 7%) and T6 (manual thinning) with four replications. During the 2016/2017 season, solely one plum tree access was taken into account along with six treatments, such as T1 (control); T2 (ATS 6%); T3 (ATS 7%); T4 (ATS 8%); T5 (ATS 9%) and T6 (manual thinning) and four replications. The evaluations were performed seven days before the application of ATS and 30 days before harvest to establish the percentage of fruit drop. The following response variables were assessed: diameter (D), fresh mass (MF), firmness (N), soluble solids (SS), titratable acidity (AT), ratio, pH and plant production (PP). Experimental data were compared by means of the Tukey test at 5% probability. The concentration of 8 % ATS was efficient in the chemical thinning of the Japanese plum fruits, having a diameter and productivity similar to the manual thinning, evidencing that such a product was amenable to enhance commercial fruit quality.

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“…Como a operação de poda em fruteiras de caroço mobiliza vários funcioná-rios e os gastos com mão-de-obra representam de 69,3 a 75,3% do total do custo de produção no Estado do Paraná (PENTEADO JUNIOR et al, 2009), a operação realizada nas condições do pomar deve ser realizada com critério, pois o investimento de mão-de-obra não proporcionou retorno de qualidade física e química do fruto produzido. A diferença entre os anos de produção, independentemente da operação da poda, indicou que outros fatores fitotécnicos e ambientais estão relacionados à qualidade de ameixas 'Polirosa'.…”

Section: Resultsunclassified

“…A operação de poda em fruteiras de caroço mobiliza vários funcionários e os gastos com mão-de-obra representam de 69,3 a 75,3% do total do custo de produção destas fruteiras no Paraná (PENTEADO JUNIOR et al, 2009). Desta forma, a operação deve ser realizada com critério, para racionalizar a condução do pomar e auxiliar na viabilização do agronegócio com esta fruteira.…”

Section: Introductionunclassified