Banca de DEFESA: EDITE SANTOS SIQUEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : EDITE SANTOS SIQUEIRA
DATE: 11/02/2022
TIME: 09:00
LOCAL: Sala Virtual - Google Meet
TITLE:

USE OF BIOCHAR IN THE COMPOSITION OF SUBSTRATES FOR THE PRODUCTION OF FOREST SEEDLINGS

KEY WORDS:

organic waste, seedling production, charcoal

PAGES: 62
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Silvicultura
SPECIALTY: Sementes Florestais
SUMMARY:

New technologies have been developed in the search for reducing production costs and for more sustainable alternatives, such as the use of organic waste from agribusiness, such as biochar, that have potential for the formation of substrate. Biochar is a product rich in carbon, has physico-chemical characteristics capable of decreasing the leaching of nutrients, promoting greater water retention, contributing to the increase in porosity and sanding. Thus, the objective of the present work is to evaluate the effect of adding charcoal residues mixed to different materials in the formation of alternative substrate to produce quality seedlings of the species Tabebuia aurea, Handroanthus impetiginosus e Pityrocarpa moniliformis. The experiment was conducted in a completely randomized design, consisting of eight treatments and four repetitions each. The mixture of the substrate was constituted in the proportions: T1 sand (25%), coconut fiber (50%), expanded vermiculite (25%); T2 sand (25%), coconut fiber (30%), expanded vermiculite (25%), biochar (20%); T3 sand (25%), coconut fiber (20%), expanded vermiculite (25%), biochar (30%); T4 sand (25%), , expanded vermiculite (25%), biochar (50%); T5 commercial substrate Tropstrato® (100%); T6 commercial substrate Tropstrato® (80%), biochar (20%); T7 commercial substrate Tropstrato® (70%), biochar (30%); T8 commercial substrate  Tropstrato® (50%), biochar (50%). The emergency variables were evaluated, the emergence speed index, growth rate diameter the neck, height of the aerial part, height of the aerial/diameter the neck ratio, number of leaves, root system dry mass, shoot dry mass, total dry mass, shoot dry mass/root system ratio and Dickson Quality Score. In general, the addition of 30% of biochar to the commercial substrate for seedling production of T. aurea is a viable alternative for the use of waste. For H. impetiginosus the addition of 20% of biochar to the commercial substrate was ideal for the production of quality seedlings. The addition of 20% of biochar to the commercial substrate provided the greatest increase in quality in the production of P. moniliformis seedlings. The addition of 50% of biochar in the substrate composition decreases the quality of the seedlings. The use of biochar in the substrate composition for seedling production represents a viable, promising and environmentally sustainable alternative.

BANKING MEMBERS:
Presidente - 1721230 - MAURO VASCONCELOS PACHECO
Externo à Instituição - ANTELMO RALPH FALQUETO - UFES
Externo à Instituição - GIVANILDO ZILDO DA SILVA