Banca de DEFESA: JULIO CESAR VIEIRA FRARE

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JULIO CESAR VIEIRA FRARE
DATE: 28/02/2023
TIME: 08:00
LOCAL: Por videoconferência
TITLE:

"Soil quality and growth dynamics of forest and fruit species in agroforestry systems without burning in the Amazon"

KEY WORDS:

Slash-and-burn agriculture; Soil conservation; Sustainable agriculture development.

PAGES: 120
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

The natural conditions of low fertility and high acidity of the Amazon soils poses challenges for the sustainable agricultural production in the region. The use of alternative soil techniques which may avoid burning the forest down are generally dependent on the application of fertilizers and lime, non-renewable and expensive resources. The objective of this study was to evaluate the performance of an agroforestry system model implemented in newly deforested areas without the use of external inputs. For that, we evaluated the growth of twelve species, including native and fruit trees, in three gap areas with similar climate and soil characteristics, located in the National Forest of Caxiuanã, State of Pará. In general, after three years of follow-up, there was a reduction in soil fertility and difficulty in establishing the most nutrient demanding crops. Species such as Colubrina glandulosa, Carapa guianensis and Vouacapoua americana showed a low mortality rate and regular growth, while fruit trees species such as Musa paradisiaca, Theobroma spp. and Psidium spp. faced difficulties in establishing themselves in the system, showing symptoms of mineral deficiency and growth rates below expectations. The results suggest that the implementation of AFSs under these conditions should be carried out in two steps, using key species in order to improve the soil fertility before the introduction of the more demanding crops. The selection of species, the arrangement used and the adoption of specific practices for managing organic matter are important decisions to ensure a sustainable agroforestry production in the region.

 

BANKING MEMBERS:
Externa à Instituição - EDNA SANTOS DE SOUZA - UNIFESSPA
Externo à Instituição - FABRICIO WILLIAN DE AVILA - UNICENTRO
Externo à Instituição - GABRIEL CAIXETA MARTINS - ITV
Externo à Instituição - PAULA GODINHO RIBEIRO - ITV
Presidente - 030.493.086-56 - SILVIO JUNIO RAMOS - ITV