Yellow Passion-Fruit Irrigated in Diferent Cropping Systems

Abstract

-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

Yellow passion fruit in overhead trellis system do not differ in diseases intensity and is more productive compared to vertical trellis system

“…Anthracnose is favored by high temperatures, high relative humidity, and periodic rainfall (GONÇALVES JÚNIOR et al, 2007). The optimum temperature ranges from 20 to 30 o C, the spore production is favored by temperatures around 27 o C, and disease is more severe in rainy conditions, between temperatures of 22 to 28 o C and high humidity (SERRA et al, 2008;RIBEIRO, 2016). The climatic conditions observed in this study were conducive to disease development, with high temperatures and high relative humidities.…”

“…The vertical trellis system can result in higher productivity, but lower precocity than the overhead trellis system (NORBERTO et al, 2008). As for diseases intensity, changes in the plant canopy architecture can reduce the dispersion of pathogens, and create an unfavorable microclimate for disease development (ANDO et al, 2007;RIBEIRO, 2016). By tradition, the vertical trellis system is used in Southern Minas Gerais to grow grapevines.…”

Water stress mitigation by silicon in sweet-potato

“…The fresh matter of the aerial part superiority expresses the response of greater water content in the soil, and, therefore, the greater state of water energy in the leaves and turgor of the guard cells, with a positive reflection in biomass production by plants, in general (TAIZ et al, 2017), including sweet potato (DELZARI et al, 2017).…”

“…Almeida et al (2015) and Cui et al (2020) concluded that the water deficit inhibits crop photosynthesis, growth and production. This situation expresses the dependence of agricultural production systems on irrigation, in the semiarid world, and requires the adoption of water management strategies in order to obtain sustainable agricultural yields to guarantee food availability, given the growing global concern (SOUZA et al, 2016;DELZARI et al, 2017;EL-FOTOH et al, 2019).…”

“…After absorption, it accumulates in the endoplasmic reticulum, in the cell walls, and intercellular spaces as hydrated silica SiO2 • n H2S, forming complexes with polyphenols, constituting an alternative to lignin in the reinforcement of cell walls, and improving the ability of plants to withstand stress in arid regions (TAIZ et al, 2017;HELALY et al, 2017;MAHMOUD et al, 2020).…”