Physiology and production of yellow passion fruit with hydroabsorbent polymer and different irrigation depths

Abstract

The yellow passion fruit is grown under different edaphoclimatic conditions. Irrigation standardizes and increases the development and productivity of the plants. The objective of this study was to evaluate the physiological and productive aspects of yellow passion fruit with application of hydroabsorbent polymer at different irrigation depths. The experimental design was in randomized blocks in a 2 × 5 factorial arrangement. The treatments were soil with and without polymer and five dephts of irrigation (60 to 100% of crop evapotranspiration). Initial, maximum, and variable chlorophyll fluorescence, physiology (photosynthetic rate, internal carbon concentration, transpiration, stomatal conductance, water use efficiency, and instantaneous carboxylation efficiency) and production of yellow passion fruit were the variables analyzed. The hydrogel probably retained water in its structure, reducing the ability to dissipate excess energy. Setting the irrigation depth at an estimated 82% of crop evapotranspiration increased photosynthetic rate, stomatal conductance, and water use efficiency of yellow passion fruit plants. Maximum yield was 17.2 t ha-1 in irrigated plants at 100% evapotranspiration (ETc) in soil without hydrogel.

Gas exchange and yield of yellow passion fruit under different irrigated depths, planting hole volumes, and hydroretentive polymer application

“…There were four replications, each with three plants per plot. Irrigation was determined based on the evapotranspiration demand of yellow passion fruit (Cavalcante et al, 2020), and planting hole volumes…”

“…In the Northeast, the primary production areas are located in semi-arid regions, which, despite ideal soil and climatic conditions for yellow passion fruit cultivation, face temporal and spatial limitations in rainfall and low availability of water in terms of quantity and quality in reservoirs, necessitating supplemental irrigation (Freire et al, 2014;Araújo et al, 2022). According to Uchoa et al (2021), inadequate water supply to yellow passion fruit is one of the most limiting factors for production and, in general, plants under water deficit conditions reduce their physiological processes, limiting gas exchange and carbon assimilation, thereby resulting in reduced yields (Cavalcante et al, 2020).…”

Profitability of Organic Yellow Passion Fruit as a Function of Irrigation, Protected Cultivation and Pollination

“…Although the North region of Brazil offers favorable edaphoclimatic conditions for passion fruit cultivation, the annual rainfall is distributed asymmetrically throughout the year, with a drought period from May to September (INMET, 2020), limiting passion fruit cultivation since the crop requires 86 mm month -1 of water during flowering and fruit setting (DUTRA et al, 2018). Water availability is indispensable to reaching higher fruit yields and quality (CAVALCANTE et al, 2020;UCHÔA et al, 2021b), justifying the use of complementary irrigation as a profitable technique while observing the amount and moment of water application (ARAÚJO et al, 2013).…”

Manejo e produtividade de maracujazeiro amarelo em propriedade rural do município de Caririaçu – CE: um estudo de caso

“…Cavalcante et al (2020) a irrigação bem manejada permite um desenvolvimento mais homogêneo do maracujá, aumentando o direcionamento dos fotoassimilados aos frutos, contribuindo assim para o maior desenvolvimento da massa desses frutos Borges et al (2019). realizaram pesquisas sobre sistema de irrigação mais utilizado e em 70% das propriedades pesquisadas é utilizada irrigação por gotejamento no cultivo do maracujá.…”