Crescimento da bananeira Grande Naine submetida a diferentes lâminas de irrigação em tabuleiro costeiro

Abstract

RESUMOAvaliou-se, com o presente trabalho, a influência de diferentes lâminas de irrigação sob o crescimento da cultura da bananeira Grande Naine. O experimento foi conduzido no campo experimental do Centro Nacional de Pesquisa Mandioca e Fruticultura. Utilizou-se delineamento experimental blocos casualizados com seis lâminas de irrigação e oito repetições. A lâmina de irrigação L1 correspondeu à chuva. A lâmina L6 foi determinada com o uso do Kc e ETo. As demais lâminas foram determinadas pela fórmula NH = K x AF x ETo, em que NH é a necessidade hídrica da cultura (L planta -1 ), K (coeficiente empírico de transpiração da planta) e AF -área foliar (m 2 planta -1 ) e ETo -evapotranspiração de referência (mm). Foram avaliados: altura da planta; circunferência do pseudocaule; área foliar; número de folhas vivas e duração do ciclo da cultura. O melhor crescimento da cultura foi obtido com o coeficiente de transpiração de 0,57 e uma lâmina de irrigação estimada em 1247 mm. Palavras-chave: Musa spp., manejo de água, transpiraçãoGrowth of banana Grande Naine under different irrigation levels in Coastal Plain ABSTRACT This study evaluated the influence of different irrigation levels on the growth of the banana crop cv. Grande Naine. The experiment was conducted in the experimental field of the Centro Nacional de Pesquisa Mandioca e Fruticultura. A randomized block design was used with six levels of irrigation and eight replications. The irrigation L1 corresponded to rain. The irrigation L6 was determined using the Kc and ETo. The other irrigation levels were determined by the formula NH = K x AF x ETo, where NH is the water requirement of the crop (L plant -1 ), K (empirical coefficient of plant transpiration), AF -leaf area (m 2 plant -1 ) and ETo -reference evapotranspiration (mm). The parameters evaluated were: plant height, pseudostem circumference, leaf area, alive leaf number and duration of the crop cycle. The growth of cv. Grande Naine was influenced by irrigation, it is possible to estimate the water requirement of the banana crop, based on knowledge of leaf area and ETo. The best crop growth was obtained with a transpiration coefficient of 0.57 and irrigation depth estimated in 1247 mm.

Agronomic Evaluation of Banana Plants in Three Production Cycles in Southwestern State of Bahia

“…The highest cultivars in all cycles were Japira, Pacovan-Ken and genotype JV42-135, and the smallest ones, Grande Naine and Caipira, agreeing with Camolesi et al (2012). Banana plants increased in height during cycles, which is consistent with literature (SOUZA et al, 2011a;Oliveira et al, 2013). Possibly, the third cycle is representative of the height of each cultivar, since as reported by Belalcázar Carvajal (1991) and Soto Ballestero (2008), there is usually no increase in plant…”

“…The number of live leaves is an important characteristic to be analyzed, considering that the photosynthesis rate depends on the plant leaf area (OLIVEIRA et al, 2013). Souza et al (2011a) did not find differences among cultivars of three genomic groups, Grande Naine, Caipira, Prata-Anã, FHIA-18 and BRS Tropical evaluated in subtropical climate.…”

“…Different results were found in this work for most plants in the three cycles. From flowering, there is no emission of leaves, which decreases in number until harvest by the natural process of foliar senescence and defoliation to control sigatoka infestation (OLIVEIRA et al, 2013).…”

Descritores Foliares Em Mudas Do Maracujazeiro Amarelo Sob Diferentes Lâminas E Substratos

“…proporcionaram incrementos no crescimento de diversas culturas como: tomateiro (Brito et al, 2015), pimentão (Lima et al, 2012), meloeiro (Farias et al, 2003), bananeira (Oliveira et al, 2013).…”

Mathematical models to estimate leaf area of citrus genotypes

“…Leaf area is a variable of extreme importance to physiological and agronomic studies, such as vegetable growing, interception of light, remote sensing, photosynthetic efficiency, absorption of carbon, evapotranspiration, absorption of agrochemicals by the leaves, assessment of pest attack and irrigation management (Coelho Filho et al, 2004Guimarães et al, 2013;Griffith et al, 2011;Lopes and Pinto, 2005;Oliveira et al, 2013;Pereira et al, 2009;Silva et al, 2008;Stuckens et al, 2009). …”