Abstract
ABSTRACT The high rate of evaporation and the limitation of water, in quantity and quality, require the search for strategies that enable the sustainability of agriculture in the world. The experiment was carried out to evaluate the effects of water salinity, lateral protection of the pits and calcium doses on the production components of passion fruit cv. BRS GA1. The treatments were arranged in a 2 x (2 x 5) split plot, corresponding to water salinity (0.3 and 4.0 dS m-1) in the main plot, and combinations between lateral protection of the pits (without and with) and calcium doses (0, 30, 60, 90 and 120 kg ha-1) in the subplots. Number of productive branches, indices of early ripening and concentrated cropping, calculated from the weekly yields, number of fruits per plant, average fruit weight and yield were evaluated. The increase in electrical conductivity of irrigation water delays harvest and reduces the number of fruits per plant, fruit weight and yield of passion fruit. The lateral protection of the pits did not have a positive effect on the cultivation of passion fruit irrigated with saline water. Calcium dose of 60 kg ha-1 in the Entisol with low content of this macronutrient attenuates the effects of irrigation with saline water, increasing the yield of yellow passion fruit.
Highlights
Brazil is the world’s largest producer of passion fruit (FALEIRO; JUNQUEIRA, 2016), with the Northeast region leading the national production, followed by the Southeast, South, North and Midwest regions (IBGE, 2018)
The increase in irrigation water salinity can reduce the production of productive branches (FREIRE et al, 2012), length of the internodes of the branches, the amount of floral buds (DIAS et al, 2013), the production and weight of fruits (DIAS et al, 2012; SOUZA et al, 2018), reducing passion fruit yield
For the index of concentrated cropping (IC) there were no effects of the factors
Summary
Brazil is the world’s largest producer of passion fruit (FALEIRO; JUNQUEIRA, 2016), with the Northeast region leading the national production, followed by the Southeast, South, North and Midwest regions (IBGE, 2018). The increase in irrigation water salinity can reduce the production of productive branches (FREIRE et al, 2012), length of the internodes of the branches, the amount of floral buds (DIAS et al, 2013), the production and weight of fruits (DIAS et al, 2012; SOUZA et al, 2018), reducing passion fruit yield. These effects are directly related to a reduction in water consumption by passion fruit (FREIRE et al, 2011)
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