Banca de DEFESA: GUILHERME TENÓRIO DE ALMEIDA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GUILHERME TENÓRIO DE ALMEIDA
DATE: 29/07/2022
TIME: 09:00
LOCAL: sala 37 do PPGPA
TITLE:

RESIDUAL EFFECT OF BIOCHAR, ORGANIC AND MINERAL FERTILIZATION ON THE CHEMICAL CHARACTERISTICS OF THE SOIL AFTER FALLOW AND ON BEAN PRODUCTION

KEY WORDS:

Biochar, Residual effect, Semi-arid, Soil, Fertilization

PAGES: 50
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SUMMARY:

Biochar is a by-product of the thermal decomposition of organic materials in an oxygen-limited environment through the pyrolysis process. Improvements in agricultural production are often recorded in highly degraded and nutrient-poor soils, while their application to fertile and healthy soils does not always increase crop yield. Biochar promotes an increase in pH and also an increase in organic matter concentrations, soil CEC, in addition to an increase in N, P, K, Ca and Mg. Experiments conducted with the use of biochar, found that the residual effect of the application of biochar promoted positive responses after a period of nine years. Thus, the present study aimed to evaluate the effect of adding different doses of biochar, and its effects added to chemical and organic fertilization adopted in the rural region of Pernambuco, in common bean and cowpea plantations, as well as its residual effect. on the chemical attributes of the soil after the fallow period. For this, a field experiment was installed, with 12 treatments T1= Absolute control (T); T2 = fertilization with 5 t ha-1 of chicken manure (EG); T3 = fertilization with NPK (NPK); T4 = biochar at a dose of 10 t ha-1 (B10); T5 = biochar at a dose of 20 t ha-1 (B20); T6 = biochar at a dose of 40 t ha-1 (B40); T7 = EG + biochar 10 t ha-1 (EG+B10); T8 = EG + biochar 20 t ha-1 (EG+B20); T9 = EG + biochar 40 t ha-1 (EG+B40); T10 = NPK + biochar 10 t ha-1 (NPK+B10); T11 = NPK + biochar 20 t ha-1 (NPK+B20); T12 = NPK + biochar 40 t ha 1 (NPK+B40), arranged in completely randomized blocks, with three replications. The chemical characterization to determine the levels of Ca 2+, Mg2+, K+, Na+, P, potential acidity and the pH in H2O of the biochar used in the experiment was carried out according to methodologies contained in Embrapa (2011). After the period of 850 days after the application of the treatments, there was still a residual effect of the biochar present in the soil. The biochar decreased the potential acidity of the soil and increased the nutrients, especially calcium and magnesium. Treatments that received organic fertilization showed better results, indicating an optimal combination between poultry manure and biochar.

BANKING MEMBERS:
Presidente - 2578994 - JOSE ROMUALDO DE SOUSA LIMA
Interno - 1580659 - MACIO FARIAS DE MOURA
Externo ao Programa - 1513053 - ANTONIO RICARDO SANTOS DE ANDRADE