Water-Retaining Polymer and Planting Pit Size on Chlorophyll Index, Gas Exchange and Yield of Sour Passion Fruit with Deficit Irrigation

Author:

de Luna Souto Antônio Gustavo1,de Melo Edinete Nunes2,Cavalcante Lourival Ferreira2,do Nascimento Ana Paula Pereira2,Cavalcante Ítalo Herbert Lucena2ORCID,de Lima Geovani Soares3ORCID,Batista Rafael Oliveira1ORCID,Gheyi Hans Raj3ORCID,de Fátima Reynaldo Teodoro3,de Mesquita Evandro Franklin4,de Souza Gleyse Lopes Fernandes2,Silva Guilherme Romão2,Silva Daniel Valadão1ORCID,de Oliveira Mesquita Francisco5,de Oliveira Palloma Vitória Carlos1

Affiliation:

1. Postgraduate Program in Soil and Water Management, Universidade Federal do Semiárido, Mossoró 59625900, RN, Brazil

2. Postgraduate Program in Agronomy, Universidade Federal da Paraíba, Areia 58397-000, PB, Brazil

3. Postgraduate Program in Agricultural Engineering, Universidade Federal de Campina Grande, Campina Grande 58429900, PB, Brazil

4. Department of Agrarian and Exact Sciences, State University of Paraíba, Catolé do Rocha 58429-500, PB, Brazil

5. Postgraduate in Ecology and Conservation, State University of Paraiba, Campina Grande 58429-500, PB, Brazil

Abstract

Water availability is a limiting factor for the cultivation of sour passion fruit. Soil management techniques and the use of water-retaining polymers can increase soil water retention, reducing the frequency of irrigation in the crop. In this context, the objective of the research was to evaluate the gas exchange, the chlorophyll index, and the yield of the sour passion fruit cv. BRS GA1 as a function of irrigation depths, pit volumes, and doses of water-retaining polymer. The experiment was carried out in randomized blocks, in plots subdivided in a 2 × (2 × 5) arrangement, with irrigation depths of 70 and 100% of the crop evapotranspiration (ETc) as the main plot, the subplots with the volumes of pit of 64 and 128 dm3, and doses of the water-retaining polymer of 0, 0.5, 1.0, 1.5, and 2.0 g dm−3. The interaction of irrigation depths × pit volumes × doses of water-retaining polymer influences chlorophyll indexes, gas exchange, and water productivity, with positive impacts on yield of the sour passion fruit. The water depth of 70% of ETc increased the yield of sour passion fruit, in pits of 64 dm3. The application of doses of up to 1.1 g dm−3 of the water-retaining polymer and irrigation with water of 70% of ETc is recommended, and a dose of 2.0 g dm−3 of the water-retaining polymer in a pit volume of 128 dm3, associated with an irrigation depth of 100% ETc causes stress in sour passion fruit plants due to excess water.

Funder

CNPq

CAPES

UFPB

Publisher

MDPI AG

Reference44 articles.

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2. Instituto Brasileiro de Geografia e Estatística [IBGE] (2021). Brazilian Production of Passion Fruit.

3. O cultivo do maracujazeiro no Centro—Oeste do Brasil;Freitas;Rev. Agrotecnol.,2020

4. Physiology and production of yellow passion fruit with hydroabsorbent polymer and different irrigation depths;Cavalcante;Rev. Ceres,2020

5. Physiological aspects of yellow passion fruit with use of hydrogel and mulching;Souto;Rev. Caatinga,2022

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