Banca de DEFESA: RONALTON RAMOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RONALTON RAMOS
DATA : 26/07/2024
HORA: 19:00
LOCAL: Ambiente virtual
TÍTULO:

CARBON STOCK IN SOILS UNDER PASTURES IN DIFFERENT MANAGEMENT CONDITIONS IN THE NORTHWEST REGION OF MATO GROSSO

PALAVRAS-CHAVES:

Amazon; degraded pastures; soil organic matter

PÁGINAS: 63
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Ciência do Solo
ESPECIALIDADE: Fertilidade do Solo e Adubação
RESUMO:

Anthropogenic changes to the landscape lead to constant modifications in the natural cycles of planet Earth, including the carbon cycle, an essential element for life forms and an important agent of climate change in the atmosphere on a global scale. To mitigate the impact of carbon, well-managed and productive agroecosystems can act as important agents in combating climate change through the storage of carbon in the soil. Therefore, the objective of this work is to evaluate the carbon stock in the soil present in different agricultural management systems in the Northwest region of Mato Grosso and comparing the native forest vegetation. Four land uses were evaluated in the town of Juína – Mato Grosso, reformed pasture (PR), degraded pasture (PD), crops (LA) and native forest (FL) as reference, with sampling in layers 0-10, 10-20, 20-30, 30-40, 40-60 and 60-100 cm in a Red-Yellow Latosol, with six replications for each area, with sample collections to determine the C content through chemical analysis, density, soil porosity, soil organic carbon (TOC) and carbon stock, taking as a reference the carbon present in the native forest. The data were subjected to multivariate statistical analysis. The results demonstrated similarity between the uses of crops and reformed pasture with greater microporosity and lower macroporosity, the forest presented the best indicators for the physical components evaluated. For chemical components, the forest and degraded pasture are similar with a lower concentration of nutrients and greater presence of Al3+ and Fe, the areas managed with crops and renovated pasture presented higher nutritional concentrations and lower acidity. The highest percentage of total carbon was observed in the forest area and the crop area. The largest total carbon stock was observed in the crop area, an area that is well managed and with direct planting, followed by forest, renovated pasture and degraded pasture.

MEMBROS DA BANCA:
Presidente - 117000004 - MARCO ANTONIO CAMILLO DE CARVALHO
Interno - 210865003 - GUSTAVO CAIONE
Externo à Instituição - CASSIANO GARCIA ROQUE - UFMS