Effect of luminosity in plants of Theobroma cacao in an agroforestry system, in the G̃apg̃ir village, Terra Indígena Sete de Setembro, Rondônia

Abstract

The agroforestry systems (SAF’s) present great potential for the development of agroecological
practices in the Amazon region. The objective of this study was to evaluate the effect
of luminosity on the growth and development of Cacao plants in SAF’s in the G̃apg̃ir Village,
Terra Indígena Sete de Setembro. The work was carried out in a SAF’s with cocoa cultivation
of 0.5677 ha, 6 months after implantation, where 12 plants were randomly selected, measured
at height, number of leaves, stem base diameter and luminosity, and the Relative Light Intensity
(RLI). Subsequently, spatial distribution maps were elaborated and covariance analysis was
performed. The attributes height, stem base diameter, number of leaves and RLI presented
mean values of 47.93 cm, 10.5 mm, 14 units and 8.6%. The RLI presents moderate positive covariance
with the stem base diameter and the number of leaves, and weak positive covariance
with height.