Growth of irrigated and fertilized pequi trees in the Cerrado of Goiás, Brazil

The objective of this study is to evaluate the growth of pequi trees in function of irrigation and organic fertilization. A total of 96 pequi plants (6-8 years of age), spaced 5 x 5 m, were used in a randomized blocks experiment with six plots and for repetitions. Four treatments were evaluated: IF...

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Autores:
Miranda, Raiane Ferreira
Alves Júnior, José
Casaroli, Derblai
Pêgo Evangelista, Adão Wagner
Mesquita, Márcio
Bites Barbosa, Bruna Souza
Tipo de recurso:
Article of journal
Fecha de publicación:
2018
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/65957
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/65957
http://bdigital.unal.edu.co/66980/
Palabra clave:
63 Agricultura y tecnologías relacionadas / Agriculture
Caryocar brasiliense Camb
Water stress
Native fruits from Cerrado
Localized irrigation
Sap flow
Caryocar brasiliense Camb
Estrés hídrico
Frutos nativos del Cerrado
Riego localizado
Flujo de savia
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
Description
Summary:The objective of this study is to evaluate the growth of pequi trees in function of irrigation and organic fertilization. A total of 96 pequi plants (6-8 years of age), spaced 5 x 5 m, were used in a randomized blocks experiment with six plots and for repetitions. Four treatments were evaluated: IF = Irrigation with fertilization, IWF = Irrigation without fertilization, WIF = Without irrigation with fertilization, and WIWF = Without irrigation and without fertilization, in subdivided plots. The irrigation system was microsprinklers. The volume of water applied was estimated by the evapotranspiration of pequi trees. Cover fertilizations were performed in Nov/2014 using composting material and Yorim, and in Nov/2015 using tanned cattle manure and chicken litter. The growth was monthly evaluated by the height and the stem perimeter, and the canopy was evaluated in a 7.1 years old orchard. Leaf temperature and transpiration were evaluated by sap flow in irrigated and non-irrigated trees. The pequi tree did not respond to treatments in terms of height and stem perimeter. Irrigation provided trees with larger canopy areas. When irrigated, the leaf temperature of pequi trees remained below average air temperatures, independently of dry or rainy periods. Without irrigation, plants presented water stress during the dry season. Under rainy conditions, the mean transpiration of the pequi tree was 24.09 L d-1 per plant. When irrigated, it was on average 42.29 L d-1 per plant.