-With this study, the objective was to determine the most economic management of irrigation water applied at different levels in the culture of passion fruit grown in conventional system and in polyethylene bags. The experiment was conducted in the city of Remanso, state of Bahia, Brazil. The experimental set-up was a randomized block design in a factorial design 2 (conventional system, and polyethylene bags of 100 L) x 5 (irrigation levels: 100%, 80%, 60%, 40% and 20% an irrigation management at field capacity) with four replications and four plants per plot. The treatments began 30 days after transplanting the seedlings to the field, and the analyzed variables were: plant height, stem diameter, leaf area and number of tertiary branches, of flower buds and fruits per plant. The data were interpreted by means of analyses of variance (test F) and means were compared by Tukey test at 5% probability of error. It was found that the yellow passion fruit got greater agronomic performance when grown in polyethylene bags, with irrigation management at 80 % field capacity. Index terms: Passiflora edulis; water management; plant growth. MARACUJAZEIRO-AMARELO IRRIGADO EM DIFERENTES SISTEMAS DE CULTIVORESUMO -Com este estudo, o objetivo foi determinar o manejo econômico de água de irrigação aplicada em diferentes lâminas na cultura do Maracujazeiro-amarelo cultivado em sistema convencional e em bolsas de polietileno. O experimento foi realizado numa propriedade do Município de Remanso-BA, em delineamento de blocos casualizados em esquema fatorial 2 (sistema convencional e em bolsas de polietileno de 100 L) x 5 (lâminas de irrigação: 100%, 80%, 60%, 40% e 20% da capacidade de campo), com quatro repetições, e quatro plantas por cada repetição, sendo que a aplicação dos tratamentos iniciou-se após 30 dias do transplantio das mudas ao campo. As variáveis analisadas foram: altura de planta, diâmetro do colo, área foliar e número de ramos terciários e de botões florais e de frutos por planta. Os dados foram submetidos à análise de Variância (teste F) e as médias comparadas entre si pelo teste Tukey, a 5 % de probabilidade de erro. Verificou-se que o Maracujazeiro-amarelo obteve maior desempenho agronômico quando cultivado em bolsas de polietileno, disponibilizando-se 80% da capacidade de campo. Termos para indexação: Passiflora edulis; manejo de água; crescimento de planta.1
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