Banca de QUALIFICAÇÃO: DANIELLE FRANÇA DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : DANIELLE FRANÇA DE OLIVEIRA
DATE: 05/03/2021
TIME: 13:30
LOCAL: Ambiente Virtual
TITLE:

BIOCHAR AND HUMIC SUBSTANCES AS ECOLOGICAL ALTERNATIVE FOR AGRICULTURAL SMART-FERTILIZER PRODUCTION

KEY WORDS:

Humic acids; plant nutrition; soil fertility; smart-fertilizer

PAGES: 90
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Química do Solo
SUMMARY:

Technologies are developed to ease this need to import and optimize the use of fertilizers. One of them is the production of "smart" organomineral fertilizer, which consists of a physical mixture or combination of mineral and organic sources in different proportions, according to the needs of the crop. The practice of recycling organic waste is economically and environmentally viable and allows the recovery of nutrients such as nitrogen, phosphorus, and potassium, in addition to contributing to increasing organic matter in the soil, which allows for an improvement in the physical structure, water retention capacity and supply of nutrients to plants. Among the organic residues used is Biochar, which is the product of thermal decomposition of raw material, mainly biomass, and which has a structure rich in carbon. Because it is recalcitrant carbon, its addition to the soil can also bring several benefits such as increased porosity, water retention capacity, habitat for microorganisms, slow release of nutrients, among others. In addition, humic substances consist of humified organic matter, which has a more labile structure than Biochar, and therefore has less time in the soil. Humic substances are composed of different fractions, which are distinguished according to their solubility. Therefore, the present work presents the following hypotheses: a) The production of Biochars using different biomasses and different pyrolysis temperatures will provide a varied chemical structure to these materials; b) Slow-release organomineral fertilizers produced from a source of K, biochar and humic acid are efficient in making the nutrient available in time for plant absorption; c) The coating of phosphate fertilizer with humic acid and biochar optimizes the release of the nutrient to the plant. To test these hypotheses, the work was organized into three chapters: I - Production of biochar as an alternative for recycling plant waste and sewage sludge: Structural monitoring of the pyrolysis process. The objective was to produce Biochars from eucalyptus shavings, eucalyptus chips, and sewage sludge, at temperatures of 300, 400, and 500 ºC and to verify their structural, morphological, and chemical characteristics; II - Synergistic action of biochar and humic acid in granulated and pelleted potassium fertilizers. It aimed to test the development of rice plants with the application of slow-release organomineral fertilizers produced from a source of K, biochar and humic acid mixed and agglomerated through pasturing and granulator; III - Production, characterization and application of phosphate fertilizers in multilayer humic acid and biochar. The objective was to verify the influence of layers of biochar and humic acid in phosphate fertilizer on the release of P for the absorption of rice plants.

BANKING MEMBERS:
Presidente - 1399485 - ANDRES CALDERIN GARCIA
Interno - 2213075 - EVERALDO ZONTA
Externo à Instituição - CARLOS ALBERTO SILVA - UFLA
Externo à Instituição - WENCESLAU GERALDES TEIXEIRA