Yellow passion fruit postharvest conservation and quality according to organic and mineral fertilizer

Abstract

Yellow passion fruit are highly perishable after harvest. Organic products may have better nutritional quality and better postharvest conservation due to the application of different cultural practices such as organic fertilization and non-use of synthetic pesticides. The objective of this study was to evaluate the effects of organic fertilization on the quality and postharvest conservation of yellow passion fruit. The orchard was installed in a completely randomized design with four replications and four plants on the same row per experimental unit. The treatments were three types of fertilization applied in the orchard: mineral (MIN) recommended for the crop; organic (ORG), equivalent to the recommended potassium fertilization for the crop and 2 × ORG with twice the ORG dose. The organic fertilizer used was partially cured cattle manure. The mineral and organic fertilizers were applied superficially. During the harvest, the fruits were classified according to mass, type A (above 175 g), B (between 125 and 175 g) and C (below 125 g). The experiment was developed in a completely randomized design, in a factorial scheme (fertilization x fruit mass classes), with six replications and 90 fruits per treatment. Fruits of plants fertilized with 2 × ORG showed the same pulp yield (PY) of those that received MIN fertilization. Fruits of class C and fruits from plants fertilized with MIN showed greater weight loss. No difference between fertilization and mass classes was found for soluble solids (SS) and titratable acidity (TA). There was also no effect of fertilization on the SS / AT ratio, pH and vitamin C content, however, class B fruits showed, on average, higher values for these pulp aspects. The dose of ORG fertilizer was not enough to keep the fruit quality in relation to the PY, but the fruits from plants fertilized with ORG and 2 × ORG kept up with better commercial quality for a longer period. The organic fertilizer with cattle manure is an efficient alternative to maintaining postharvest conservation of yellow passion fruit. Index Terms: cattle manure; Passiflora edulis Sims f. flavicarpa Degener; vitamin C; weight loss. Conservação pós-colheita e qualidade dos frutos de maracujazeiroamarelo de acordo com a adubação orgânica e mineral Resumo-Os frutos de maracujá-amarelo são altamente perecíveis após a colheita. Produtos orgânicos podem ter melhor qualidade nutricional e melhor conservação pós-colheita devido à aplicação de diferentes práticas culturais, como adubação orgânica e não utilização de pesticidas sintéticos. O objetivo deste trabalho foi avaliar os efeitos da adubação orgânica na qualidade e na conservação pós-colheita de frutos de maracujáamarelo. O pomar foi instalado em delineamento inteiramente casualizado, com quatro repetições e quatro plantas da mesma linha por unidade experimental. Os tratamentos foram três tipos de adubações aplicadas no pomar: mineral (MIN), recomendada para a cultura; orgânica (ORG), equivalente à adubação potássica, recomendada para a cultura e 2 × ORG com o dobro da dose...

Nutrient suppression in passion fruit species: an approach to leaf development and morphology

“…These reactions can be well observed in the activities of opening and closing the leaf stomata (WOLDEMARIAM et al, 2018), another function of K together with Mg, is to act directly in the transport of photoassimilates mainly of sucrose from the cells of the palisade parenchyma to the apoplast (Table 4 and Figure 7) (KOCH et al, 2019) which are directed to the phloem pots and directed to the other regions of the plant and which can also guarantee greater sweetness of the fruits of the species P. edulis at the time of harvest and a well-nourished plant produces fruits with longer shelf life (PACHECO et al, 2018).…”