Ecophysiology of sugarcane in the understory of Peltophorum dubium Spr. in agroforestry systems arrangements

Elvis Felipe Elli, Braulio Otomar Caron, Gizelli Moiano de Paula, Elder Eloy, Felipe Schwerz, Denise Schmidt

Abstract


The objective of this study was to evaluate physiological and thermal aspects of sugarcane, in North and South oriented lines, in ‘canafístula’ understory under two plant arrangements in an agroforestry system. The experimental design was a completely randomized block in a 2x2x6 factorial, with two agroforestry systems (strip and line), two evaluation lines (North and South) and at six times a day (9am, 10am, 12pm, 2pm, 3pm and 4pm) with three repetitions. The evaluated characteristics were: incident photosynthetically active radiation (RFA), leaf temperature (TF), resistance to vapor diffusion (RS) and transpiration (E) using a digital porometer LI-1600 LI-COR. Analysis of variance revealed differences for the interaction of agroforestry system x evaluation line x time, for all variables. The physiological and thermal characteristics of sugarcane are influenced by plant arrangement, agroforestry system and the local evaluation within the system. The strip system lead to a higher available amount of RFA in its understory, which reflects in increased RS values and reduced E of sugarcane. The South line presented higher E for sugarcane in the morning period in strip system and lower during the afternoon for the line system, due to higher TF values.


Keywords


Radiação fotossinteticamente ativa, sombreamento, transpiração.



DOI: https://doi.org/10.14295/cs.v7i4.1538

Comments on this article

View all comments


Copyright (c) 2017 Elvis Felipe Elli, Braulio Otomar Caron, Gizelli Moiano de Paula, Elder Eloy, Felipe Schwerz, Denise Schmidt

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.