Banca de DEFESA: ANDRÉ GRECCO CARVALHO
Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.DISCENTE : ANDRÉ GRECCO CARVALHO
DATA : 14/04/2023
HORA: 07:00
LOCAL: ENSINO VIRTUAL
TÍTULO:
PALAVRAS-CHAVES:
Soil fertility, biochar, cupuaçu bark, lettuce, waste reuse
PÁGINAS: 72
GRANDE ÁREA: Ciências Biológicas
ÁREA: Biologia Geral
RESUMO:
The fruit pulp industries generate tons of waste, such as peels, such as cupuaçu pulp, where the peel represents approximately 45% of the fruit's mass. In this activity, the proper disposal of waste is not always done, which can lead to environmental liabilities. Biochars of various origins are objects of study due to the fact that they can be used for different purposes. One of the most widespread uses is as a soil conditioner by promoting improvements in the physical-chemical attributes of soils. Studies proposing alternatives for the disposal of cupuaçu bark have been conducted, however, none on the effects of the application of its biochar in the soil. Thus, the objective of this work was to evaluate, in a pot test, the influence of cupuaçu husk biochar as a soil conditioner, comparing it to chemical fertilization in the lettuce crop. The biochar was obtained by pyrolysis at 500°C of cupuaçu bark, ground and sieved in a 2.00 mm sieve, and applied to a typical Orthic Quartzarenic Neosol, collected in the Amazon region. The experimental design adopted was completely randomized, consisting of eight doses of biochar, 0.05%; 0.10%; 0.15%; 0.20%; 0.35%; 0.50%; 0.75% and 1.00% (m m-1), and a control, with ten repetitions. Biochar doses were applied to the soil and the homogenized mixture was incubated for 60 days. For comparison purposes, a treatment with chemical fertilization was implemented, in five replications. Bioavailable levels of macro and micronutrients were performed in the biochar and in the incubated soil samples. After the incubation period, curly lettuce, cv. Valentina, was cultivated in pots for 60 days. The phytotechnical analyzes such as number of leaves (NF), leaf area (AF), plant height (AP), shoot fresh mass (MFPA), shoot dry mass (MSPA) and root dry mass (MSR) of the plants were determined. The average available levels of K and P were equal to 23,391 and 761 mg kg-1, respectively. The application of 1% of biochar increased the levels of K in the soil from 0.08 to 1.0 cmolc dm-3. Results from NF, AF, MFPA, MSPA and MSR showed a positive Pearson (r) correlation in response to the biochar dose with the following values 0.736; 0.889; 0.911; 0.847 and 0.787, respectively (p < 0.01); the highest productivity was obtained with the dosage of 1%. In comparison to chemical fertilization, the Dunnett average test (α = 0.05) showed no significant difference in the AP and MSPA analysis for the 0.75% dosage and AP, MFPA, MSPA and MSR for 1%. The results show that the transformation of cupuaçu bark into biochar and its subsequent application to the soil contributes to the production of lettuce, with the potential to minimize the need for industrialized potassium fertilizers, and reduce the environmental impacts resulting from the inadequate disposal of waste from industrialization. of cupuaçu pulp.
MEMBROS DA BANCA:
Interno - 420.965.451-53 - CELIA ALVES DE SOUZA - UNEMAT
Externo à Instituição - JONATHAN WILLIAN ZANGESKI NOVAIS - UNIC
Externo à Instituição - JUBERTO BABILONIA SOUSA - IFMT
Externo à Instituição - JÚLIO CÉSAR AZEVEDO NÓBREGA - UFRB
Presidente - 110049004 - MARIA APARECIDA PEREIRA PIERANGELI
Interno - 82438001 - SANDRO BENEDITO SGUAREZI
Interno - 118181008 - WILKINSON LOPES LAZARO