Manejo da solução nutritiva sobre a qualidade pós-colheita de tomate salada fertirrigado em areia

Abstract

Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado. Manejo da solução nutritiva sobre a qualidade pós-colheita de tomate salada fertirrigado em areia Management of the nutrient solution for postharvest quality of tomatoes with fertigation in sandResumo O presente trabalho teve como objetivo avaliar o efeito de manejos e concentrações da solução nutritiva em fertirrigação, em cultivo protegido, sobre a qualidade pós-colheita de tomate de mesa. Os tratamentos consistiram do manejo da solução nutritiva, tendo como base a condutividade elétrica (CE) e a concentração individual de íons (CI) do lixiviado, nas concentrações iniciais de 1,6 e 3,2 dS m -1 . Os frutos foram avaliados quanto aos teores de macrominerais, sólidos solúveis totais (SST), vitamina C, compostos fenólicos totais, flavonoides totais e compostos antioxidantes. Os teores de N, P e S foram maiores no manejo da solução nutritiva com base na CI, independentemente da concentração inicial de íons. Os teores de K e Ca apresentaram efeitos da interação entre a forma de manejo e a concentração de íons, enquanto o teor de Mg não foi influenciado pelos fatores estudados. O teor de vitamina C e a atividade antioxidante foram maiores no manejo da solução com base em CE, enquanto o teor de fenóis e flavonoides foi maior no manejo da solução com base em CI. O tipo de manejo e a concentração da solução nutritiva em fertirrigação afetam a qualidade pós-colheita de frutos de tomate. Lycopersicon esculentum Mill.; Fertirrigação; Minerais; Fenóis; Flavonoides; Antioxidantes. Palavras-chave: AbstractThe aim of this study was to evaluate the effect of the management of the nutrient solution concentrations used in the fertigation of table tomatoes cultivated in a protected environment, on postharvest quality. The treatments consisted of managing the nutrient solution based on the electrical conductivity (EC) and individual ionic concentrations (IC) in the leached solution at the levels of 1.6 and 3.2 dS m -1 . The fruits were evaluated for their macromineral contents, total soluble solids (TSS), vitamin C, total phenols, flavonoids and antioxidants. The N, P and S contents were higher for management of the nutrient solution based on the IC, regardless of the initial ion concentrations. The K and Ca contents showed interaction effects between the forms of management and ion concentrations, while the Mg content was not influenced by the factors studied. The vitamin C content and antioxidant activity were higher for management of the solution based on EC, while total phenols and flavonoids were greater for management based on IC. The type of management and the nutrient solution concentration used in fertigation affect the postharvest quality of tomato fruits. Keywords

Fruit quality of West Indian cherry under saline water irrigation and nitrogen-potassium fertilization

“…Thus, the values obtained for the West Indian cherry fruits in this study (on average 10.28 ºBrix) are in accordance with the quality standard for processing and marketing the pulp. Thus, the increase in the synthesis of soluble solids in the pulp of West Indian cherry due to the greater availability of N-K is understandable, given the functions performed by these nutrients in metabolic reactions, participating in the synthesis and translocation of carbohydrates and proteins, resulting in the increase of soluble solids (Takahashi et al, 2018). Barros et al (2012) concluded that nitrogen fertilization positively influences the soluble solids contents of watermelon.…”

Lactic preservation of cherry tomato cultivated under irrigation with saline waters

“…Reductions in the FLA content of cherry tomato fruits subjected to lactic fermentation formulations and with increased ECw may be associated with delayed fruit deterioration. During the ripening process of vegetables, chlorophyll is degraded, while there is synthesis of other pigments such as flavonoids (Takahashi et al, 2018).…”

“…Another aspect to be emphasized is the post-harvest quality, because the cherry tomato fruit has high perishability, caused by the increase in respiratory metabolism, due to the high moisture content of this vegetable, depreciating the commercial value of fruits for fresh consumption (Takahashi et al, 2018). In this context, one of the techniques that can be used for postharvest preservation in vegetables is lactic fermentation, in which bacteria, fungi, and yeasts alter the structure of foods or provide them with better taste characteristics, even extending their preservation time (Soares et al, 2020).…”

Analysis of Fertigation Effluents From Mini-Tomato Greenhouses and the Need for Detection of Control Points

“…Descriptive analysis was used to compare the suitability of solutions with the limits recommended in the literature. These standards were obtained through a bibliographic survey on the nutritional requirement of tomato crops (Fernandes et al, 2002;Moraes, 1997;Pires et al, 2009;Santos et al, 2017;Takahashi et al, 2018), as shown in Table 1. These limits correspond to the maximum and minimum absolute values among the recommendations found.…”