Respostas do Mogno Africano cultivado sem restrição hídrica às condições micrometeorológicas de Goiânia-GO
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2016-03
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African mahogany (Khaya ivorensis A. Chev.) planting is spreading in Brazil as to re-forest as to obtain hardwood. This work aimed to evaluate the growing of young African mahogany plants to micrometeorological conditions of Goiânia-GO, without water restriction. Experiments were carried out in greenhouse (pots), during 141 days, and lysimeters, per 160 days. In pots were adjustment quadratic equations between the biometric variables and the time, except for the stem diameter, which set a linear. Growth rates showed oscillatory trends over time, showing a fast dynamic distribution of carbohydrates between the organs of the plant. In Lysimeter, that adjustment was exponential, with R2> 0.95. The average of water uptake per plant per day (CH2O d-1) was 2.5 L plt -1 d-1, and per meter square of leaf area was ke d-1=0.82 L m-2 d-1. Growth rates showed again oscillatory behavior in time, not lying relationships between higher rates and increased water consumption. Regression analysis adjusted exponential equations between the growth rates and micrometeorological variables and CH2O d-1. The ke d-1 showed an increased when related to solar radiation, vapor pressure deficit, wind and reference evapotranspiration, and decreasing in relation to relative humidity. We conclude that, without water restriction, there is not a trend for growth rates of African mahogany plants and micrometeorological variables, but water consumption by plants has a strong relationship with these variables.
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Evapotranspiração, Taxas de crescimento, Khaya ivorensis A. Chev., Cerrado, Evapotranspiration, Growth rate, Brasilian Savanna
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CASAROLI, Derblai et al. Respostas do Mogno Africano cultivado sem restrição hídrica às condições micrometeorológicas de Goiânia-GO. Revista de Ciências Agrárias, Belém, v. 59, n. 1, p. 66-73, 2016. DOI: 10.4322/rca.2162. Disponível em: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/2162. Acesso em: 04 out. 2024.