Physicochemical quality of early-maturing ‘Navel’ sweet oranges

Abstract

The cultivation of new types of oranges can be a good alternative for citrus growers because there is a growing domestic market and good export prospects. Due to these expectations, it is essential to search for new cultivars for use in the fresh fruit industry. Therefore, the aim of this work was to physicochemically characterize the fruits of new cultivars of 'Navel' oranges, seeking alternatives with good characteristics, such as earliness, lack of seeds, good color and organoleptic characteristics desired by the consumer market. The fruits of five new cultivars of 'Navel' orange were evaluated, namely, 'Bahia Valente' (CN 28), 'Golden Nugget Navel' (CN 41), ''Robertson Navel'' (CN 39), 'Washington Navel' (CV 27) and 'Washington Navel I' (CN 34), during two harvest seasons (2012/2013 and 2013/2014). The following physicochemical variables were quantified: mass, peel color, juice yield, acidity, soluble solids and ratio. The cultivars studied were compared to the commercial cultivar 'Bahia Cabula' (CV 25). The new cultivars produced fruit with standards that met consumer expectations, with fruit mass suitable for sale of the fresh fruit, good yield juice and early maturation (March), which enables harvesting 'Bahia Cabula' in the off-season period. Thus, it is concluded that there are navel orange cultivars with acceptable physicochemical qualities and early maturation. Key words: Citrus sinensis. Off-season. Fresh fruit. Orange navel. ResumoO plantio de novos tipos de laranjas pode ser boa alternativa aos citricultores, pois há um mercado interno crescente e boas perspectivas de exportação. Em decorrência dessas expectativas torna-se primordial buscar novas variedades para o segmento de frutas frescas. Portanto, objetivou-se, com este trabalho, caracterizar físico-quimicamente frutos de novas variedades de laranjas tipo 'Bahia', buscando opções que apresentem boas características, como precocidade de produção, ausência de sementes, boa coloração e características organolépticas aceitas pelo mercado. Dessa forma, foram avaliados frutos de cinco novas variedades de laranja doce, tipo 'Bahia': 'Bahia Valente' (CN 28), 'Golden Nugget Navel' (CN 41), 'Robertson Navel' (CN 39), 'Washington Navel' (CV 27) e 'Washington Navel I' (CN 34), durante duas safras (2012/2013 e 2013/2014), quantificando-se as seguintes variáveis físico-químicas: massa, coloração da casca, rendimento de suco, acidez, sólidos solúveis e ratio. As variedades em estudo foram comparadas à variedade comercial 'Bahia Cabula' (CV 25). As novas variedades produziram frutos com padrões requeridos pelo mercado consumidor, com massa do fruto adequada para venda in natura, bom rendimento de suco e maturação precoce (março), que proporciona a colheita na entressafra da 'Bahia Cabula' no mercado. Dessa forma conclui-se que há variedades tipo Bahia, com qualidade físico-química aceitável e de ciclo precoce. Palavras-chave: Citrus sinensis. Entressafra. Fruta de mesa. Laranja de umbigo.

Performance of the pineapple sweet orange on different rootstocks

“…Orchards in this region are mostly formed by the combination of the 'Pera' sweet orange, clone CNPMF-D6 (RODRIGUES et al, 2016) grafted on the 'Rangpur' lime (C. limonia Osbeck) lemon (PRUDENTE; SILVA; CUNHA CUNHA SOBRINHO et al, 2013;CARVALHO, 2016), whose production is intended for the juice processing industry. In this region, the diversification of scion and rootstock cultivars has been the focus of several studies as a response to economic problems the sector faces, including the phytosanitary vulnerability monocultures (RODRIGUES et al, 2016;CARVALHO et al, 2016a;CARVALHO et al, 2016b;CARVALHO, 2016;SILVA et al, 2017), the demand for production distribution as the result of manpower shortage for harvest and the need to extend harvest seasons to avoid low prices (BASTIANEL et al, 2014;AZEVEDO et al, 2017).…”