Crescimento de mogno africano submetido a diferentes níveis de irrigação por microaspersão
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2016-09
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African mahogany is a tree species that has been increasing in Brazil in commercial forest. However, there is still scarce information about the responses of this species to environment, especially in evapotranspiration and water requirement. Thus, as one of the barriers for crop production is water deficit, an alternative would be the irrigation in the beginning of the cycle in field. The objective of this study was to evaluate the growth of mahogany young trees irrigated by micro sprinkler. The study was conducted in Bonfinópolis-GO, Brazil, the first two years in the field. The plants were implanted with 5x5m spacing in Oxisol using 1 emitter to each 2 plants. The design was used in a randomized block design, with nine treatments (flow rates: 0, 20, 30, 35, 40, 50, 58, 70 and 90Lh-1), with three replications. We evaluated the stem diameter, the diameter at breast height (DAP), plant height and stem. There were significant differences (p> 0.01) between treatments, adjusting linear equations for all variables. The average plant height at 2 months of age was 0.28m and at 20 months ranged from 2.75m without irrigation to 3.72m irrigated. Initially the stem was 0.25 m and by the end it ranged from 0.53m without irrigation to 0.94m irrigated. Stem diameters, from 2 to 16 months old, ranged from 0.79 to 5.9 cm without irrigation and 6.5cm irrigated. And from 16 to 20 months DAP ranged from 2.6 to 3.7cm without irrigation and 4.6 to 5.8 cm irrigated. The best tree growth was obtained by applying 90Lh-1.
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Khaya ivorensis, Déficit hídrico, Madeira nobre, Irrigação localizada, Manejo da água, Drougth, Hardwoods, Trickle irrigation, Water management
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ALVES JUNIOR, José et al. Crescimento de mogno africano submetido a diferentes níveis de irrigação por microaspersão. Irriga, Botucatu, v. 21, n. 3, p. 466-480, 2016. DOI: 10.15809/irriga.2016v21n3p466-480. Disponível em: https://revistas.fca.unesp.br/index.php/irriga/article/view/1936. Acesso em: 03 out. 2024.