Desempenho Agronômico De Cultivares De Cebola Sob Diferentes Manejos De Irrigação No Submédio São Francisco

Abstract

Este trabalho teve o objetivo de estudar o desenvolvimento de cinco cultivares de cebola (IPA 10, IPA 11, Alfa São Francisco, Serena e Antares), no município de Juazeiro, BA, irrigadas por gotejamento, sob quatro métodos de manejos de irrigação: Penman -Monteith FAO, tensiometria, e 100% e 70 % da evaporação do tanque classe A. O delineamento estatístico utilizado foi o inteiramente casualizado, em esquema de parcelas subdivididas, constituídos de quatro manejos de irrigação nas parcelas e cinco cultivares de cebola nas subparcelas. Foram avaliadas a produtividade total, produtividade comercial, produtividade de bulbos classe 1, 2, 3 e 4, teor de ácido pirúvico e teor de sólidos solúveis. Não foi observado efeito de interação entre os manejos de água e as cultivares de cebolas. As cultivares Serena e Antares apresentaram produtividade total e comercial significativamente superior às demais cultivares. O manejo de irrigação baseado no Tanque Classe A a 70% promoveu desempenho inferior para a variável produtividade comercial. Palavras-chave:Allium cepa L., evapotranspiração, manejo de água. ABSTRACT BANDEIRA, G. R. L.; DE QUEIROZ, S. O. P.; ARAGÃO, C. A.; COSTA, N. D.; SANTOS, C. A. F. CROP PERFORMANCE OF ONION CULTIVARS UNDER DIFFERENT IRRIGATION MANAGEMENTS IN THE LOWER SÃO FRANCISCO BASINThis work aimed to study the development of five onion cultivars (IPA 10, IPA 11, Alfa São Francisco, Serena and Antares), in Juazeiro, State of Bahia, Brazil, drip irrigated, under four methods of irrigation management: Penman -Monteith FAO, tensiometry, 100% and 70% of class A pan evaporation. The experimental design was completely randomized, in a split-plot design, consisting of four irrigation management methods in the plots and five onion cultivars in the subplots. The variables evaluated were: total yield, marketable yield, yield of type 1, 2, 3 and 4 bulbs, pyruvic acid content and soluble solids content. There was no interaction effect between irrigation management methods and the onion cultivars. The yield and quality of Serena and Antares cultivars were significantly higher than the ones of the other cultivars.

Efeito de doses de fósforo na produtividade e armazenamento pós-colheita de dois cultivares de cebola

“…As menores perdas de massa observadas para o cultivar Franciscana IPA-10 podem estar relacionadas com o maior teor de só-lidos solúveis. Bandeira et al (2013) (Kurtz et al, 2012).…”

Marketable yield of onion under different irrigation depths, with and without mulch

“…The highest marketable yields (42 t ha -1 without mulch and 56 t ha -1 with mulch) were obtained with water depth corresponding to 100% ETc. Bandeira et al (2013) also obtained highest marketable yield of onion bulbs applying water depth corresponding to 100% ETc, compared with 75% ETc, performing irrigation management with Class A pan and without using mulch. Similar effect of different irrigation depths on onion bulb yield have also been observed by Olalla et al (2004), Enciso et al (2009), Ramalan et al (2010) and Igbadun et al (2012).…”

“…Hence, the application of water depth corresponding to 100% ETc associated with the use of mulch promotes increments in the marketable yield and quality of onion bulbs. Production of higher-class onion bulbs leads to higher commercial profitability and greater acceptance in the Brazilian market (Bandeira et al, 2013), considered by Reghin et al (2006) as an indicator of the high production quality achieved. Table 4 shows the values of marketable yield, marketable mean diameter and percentage of onion bulbs under both soil conditions, for the different irrigation depths.…”

Plant breeding in the semiarid region of Brazil: examples of success

“…The researcher Luiz Jorge da Gama Wanderley supervised the entrance of the breeders Paulo César Tavares de Melo, Dimas Menezes and of Jonas Araújo Candeia, who is still active until today. However, in terms of yield, the varieties of the IPA series are less productive than the hybrids, with around 40 t ha -1 of commercial bulbs, while the hybrids produced over 50 t ha -1 (Bandeira 2010). It is likely that in the future, famers will seek access to hybrid seeds, although the price of these seeds might be unattractive for most of the farmers.…”