Banca de QUALIFICAÇÃO: ELAINE DA SILVA SANTOS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ELAINE DA SILVA SANTOS
DATA : 04/03/2021
HORA: 09:00
LOCAL: https://meet.google.com/dju-ncvh-rgg
TÍTULO:

SPATIAL VARIABILITY OF PHYSICAL ATTRIBUTES, ORGANIC CARBON, CARBON STOCK AND SOIL BIOLOGY IN THE AREA FOR THE IMPLEMENTATION OF A LAVOURA-LIVESTOCK-FOREST INTEGRATION SYSTEM IN THE WEST REGION OF PARÁ

PALAVRAS-CHAVES:

geostatistics, soil-plant system, entomofauna.

PÁGINAS: 43
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

Considering that in a system of crop-livestock-forest integration (ILPF) the availability of nutrients for plants is linked to the availability of these nutrients in the soil, emphasizing that the dynamics and cycling of nutrients depend on the production system adopted. The mapping of carbon stocks in Amazonian soils is of great importance, in addition to the need for studies on the physical and chemical properties of the soil, and the influences that the cover exerts on the soil-plant system. Thus, the present work aimed to study the spatial variability of physical attributes, entomofauna and organic carbon of soil and litter in an area where an ILPF system will be installed. The project is in progress, in the Experimental Farm of the Universidade Federal do Oeste do Pará - UFOPA, Municipality of Santarém, where 300 soil samples were collected for physical analysis at depths of 0.00 - 0.20; 0.20 - 0.40 and 0.40 - 0.60 m for analysis of soil density (SD) and soil particle density, macro and micro porosity, total porosity, gravimetric (UG) and volumetric (UV) moisture. Insects were also collected using pitfall traps for later identification. The burlap is being collected and dried in an oven at 65º C for 72 hours. The analysis of the data is being carried out with the use of R software, for geostatistical analysis where semivariograms and maps of insect population density, of the physical attributes of the soil, of the organic carbon and carbon stock will be established, in order to determine the existence of spatial dependence between samples and their pattern of distribution in the sampling area. Among the results found, the presence of higher clay content was observed in all soil depths analyzed, in the forest area. At the 0-20 cm depth the SD, UG, UV data presented lower values than in the fallow area, which was once a production area, and, as expected, because of its lower density, the macroporosity of the forest area was higher than the fallow area at this collection depth. At the depth of 20-40 cm, the results showed the SD, UG, UV of the native forest area also with lower values than in the fallow area, already the macroporosity also showed a lower result than the fallow area at this depth. In the evaluation of the entomofauna, a great variability was observed in the total number of individuals collected in the fallow area in relation to the forest area. Twelve orders of insects were found: Hymenoptera, Blattodea, Coleoptera, Isoptera, Neuroptera, Orthoptera, Hemiptera, Dermaptera, Diptera, Ephemeroptera, Lepidoptera, and Megaloptera. From a total of 3,098 insects collected, 1,710 belong to the forest area and 1,388 to the fallow area. The order Hymenoptera has the largest number of individuals collected and Coleoptera the largest number of families. In the correlation analysis of the data, we saw that the fallow area and the woodland area are negatively correlated.

MEMBROS DA BANCA:
Externo ao Programa - 1075784 - ELOI GASPARIN
Externo à Instituição - EMERSON CRISTI DE BARROS - UFOPA
Presidente - 1178274 - PATRICIA CHAVES DE OLIVEIRA