PRODUTIVIDADE E EFICIÊNCIA DO USO DA ÁGUA DE CUPUAÇUZEIRO IRRIGADO NAS CONDIÇÕES CLIMÁTICAS DE CASTANHAL-PA, AMAZÔNIA BRASILEIRA
DOI:
https://doi.org/10.15809/irriga.2022v27n1p1-15Abstract
Cupuaçu tree is a promising species for the sustainable development of Amazonian agriculture. However, it is still in the domestication phase and requires phytotechnical studies to optimize fruit production. The objective of this study was to evaluate the yield and water use efficiency (WUE) of cupuaçu trees under different levels of water availability in the municipality of Castanhal-PA. The experiment was performed between 2018 and 2020 during two harvests, using micro-sprinkler irrigation in a 0.3 ha plantation of the BRS-Carimbó cupuaçu cultivar. The experimental design was completely randomized, with four treatments and 10 replications. The treatments were: TS (without irrigation - rainfed), T50, T100, and T150, referring to 50%, 100%, and 150% of the reference evapotranspiration, respectively. Analysis of variance and comparison of means were performed by the Tukey test (p<0.05), in addition to regression analysis. The results showed better performance in response to T100, which had fruit production 68% higher than TS. The results of yield and WUE were adjusted by polynomial regression, with maximum WUE for T100 (2.615 kg ha-1 mm-1) and minimum for TS (1.105 kg ha-1 mm-1). Therefore, irrigation must be equal to 100% of the reference evapotranspiration in cupuaçu plantations.
Published
How to Cite
Issue
Section
License
Copyright (c) 2022 IRRIGA

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
This magazine provides public access to all its content, following the principle that free access to research generates greater global knowledge exchange. Such access is associated with a growing reading and citation of an author's work. The copyright of articles published in Revista Irriga is the property of the authors, with first publication rights for the journal. Because they appear in this publicly accessible magazine, articles are free to use, for their own purposes, for educational and non-commercial purposes. Further details can be obtained at http://creativecommons.org/licenses/by-nc-nd/4.0