The use of organic foods has been increased in the world. Organic fertilizers, like cattle manure, have emerged as an important component of the organic system production. The production, mass, size, and mineral composition of passion fruit pulp were evaluated when treated with a mineral fertilizer (control) (MIN) or cattle manure at a single dose equivalent to potassium fertilizer (ORG) or double dose (2×ORG). The production and the numbers of fruits of plants treated with MIN and 2×ORG was higher than with ORG. The level of nitrogen (N), phosphorus (P), zinc (Zn), iron (Fe), and copper (Cu) in the fruit pulp was similar with all three fertilizers, but the calcium (Ca) and magnesium (Mg) was higher with ORG and 2×ORG. The number and weight of the fruits of passion fruit treated with 2×ORG were similar to those with MIN fertilizer, but they contained more Ca and Mg.
Esta pesquisa teve o objetivo de avaliar a influência da adubação orgânica sobre a classificação e aparência (número de defeitos) dos frutos de maracujazeiro amarelo. O experimento foi estabelecido num latossolo vermelho amarelo em Visconde do Rio Branco, MG. Os tratamentos foram formados por três tipos de adubações aplicados no pomar: mineral (MIN) indicada para a cultura; orgânica (ORG), equivalente à adubação potássica indicada pra a cultura e duas vezes orgânica (2 X ORG), onde foi utilizado o dobro da dose do tratamento ORG. O adubo orgânico utilizado foi o esterco bovino curtido. Durante as 14 semanas de colheita os frutos foram classificados, de acordo com a massa, em tipo A (acima de 175 g), B (entre 125 e 175 g) e C (abaixo de 125 g), e, posteriormente, contabilizou-se a percentagem de defeitos leves e graves nos frutos. Mais da metade dos frutos colhidos apresentaram massa inferior a 125 g. O valor médio da percentagem de defeitos leves foi de 29,26% e de graves foi de 5,36%. A classificação dos frutos e o número de defeitos não foram influenciados pelas adubações. O que mostra que para o mercado de frutos in natura, a utilização de esterco bovino como adubo orgânico pode substituir a adubação mineral, sem gerar prejuízos na classificação e aparência dos frutos.
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...
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