Growth and quality of Microdesmia rigida (benth.) Sothers & Prance seedlings in response to potassium fertilization and watering schedule

Keywords: Caatinga, Water deficit, Oiticica, Semiarid

Abstract

The research aimed to evaluate the effects of water deficiency on growth and quality of Microdesmia rigida seedlings, as well as the ability of potassium fertilization to attenuate these effects. The experiment was conducted in a shaded environment, with 50% light interception, in the Forest Nursery of UAEF/UFCG. The treatments were distributed in an entirely randomized design (DIC), consisting of a 4x4 factorial, with four levels of potassium (K) (0, 50,100 and 150 mg dm-3 K) and four irrigation shifts (ID - daily irrigation (control), and every 5 (5D), 10 (10D) and 15 days (15D)), with five repetitions and two plants per sampling unit, totaling 160 plants. Absolute growth rate (TCA), plant height, stem diameter, height/diameter ratio (HDR), plant dry mass and Dickson Quality Index (DQI) were evaluated. Except for the HDR and DQI variables, which were not affected by the imposed treatments, the other variables suffered significant effect of irrigation shift, without having a significant effect for potassium fertilization. Increase in irrigation shift negatively affected the growth and dry mass production of plants. Potassium fertilization did not mitigate the negative effects of irrigation shifts on the growth and dry mass production of M. rigida seedlings. The quality of seedlings was not affected by the potassium fertilization and irrigation shift factors.

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Author Biographies

Rosilvam Ramos Sousa, Universidade Federal de Campina Grande

Master in Forest Sciences, Campus Patos/UFCG. Area of concentration in Ecology and Management of Forest Resources, with expertise in plant physiology (2021). Specialist in Ecology and Environmental Education (2017) UFCG/Patos. Graduated in Forestry Engineering from the Rural Health and Technology Center, Federal University of Campina Grande (UFCG), Campus Patos (2016). I have experience in the area of Forest Resources, Forest Inventory, Rural Environmental Registry (CAR) and Forest Engineering, with emphasis on Technology and Use of Forest Products.

Lucineudo Freire, Federal University of Campina Grande

Possui graduação em Agronomia pela Universidade Federal da Paraíba (1988), mestrado em Agronomia (Fisiologia Vegetal) pela Escola Superior de Agricultura de Lavras (ESAL), atual Universidade Federal de Lavras (1990), doutorado em Agronomia (Produção Vegetal) pela Universidade Estadual Paulista Júlio de Mesquita Filho (2000) e pós-doutorado no Laboratório de Fisiologia Vegetal da Universidade Trás-os-Montes e Alto Douro (UTAD), em Vila Real, Portugal. Atualmente é professor Titular da Universidade Federal de Campina Grande. Tem experiência na área de Recursos Florestais e Engenharia Florestal, com ênfase em Fisiologia Florestal, atuando principalmente nos seguintes temas:germinação de sementes e crescimento de plantas sob condições de estresse hídrico e salino, além do efeito do sombreamento no crescimento de mudas de espécies arbóreas da Caatinga.

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01 Capítulo de livro:
MARQUES, D. J.; BIANCHINI, H. C.; LOBATO, A. K. S.; SILVA, W. F. Potassium fertilization in the production of vegetables and fruits. In: Potassium-Improvement of quality in fruits and vegetables through hydroponic nutrient management. IntechOpen, 2018, 118 p.
V.66 (2023): RCA AJAES
Published
2023-12-15
Issue
Vol 66 (2023): RCA AJAES
Section
Scientific Articles

Copyright (c) 2023 Rosilvam Ramos Sousa, Antonio Lucineudo de Oliveira Freire

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