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- Title
Physiology and production of yellow passion fruit with hydroabsorbent polymer and different irrigation depths.
- Authors
Guilherme Cavalcante, Adailza; Ferreira Cavalcante, Lourival; de Luna Souto, Antônio Gustavo; Pereira Cavalcante, Alian Cássio; Lima de Araújo, Danila; Pereira do Nascimento, Ana Paula; Cola Zanuncio, José
- 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.
- Subjects
PASSION fruit; WATER efficiency; IRRIGATION; PLANT-water relationships; CHLOROPHYLL spectra; WATER requirements for crops; PHOTOSYNTHETIC rates; PLANT transpiration
- Publication
Revista Ceres, 2020, Vol 67, Issue 5, p365
- ISSN
0034-737X
- Publication type
Article
- DOI
10.1590/0034-737X202067050004