Banca de DEFESA: ALINE NORONHA COSTA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ALINE NORONHA COSTA
DATE: 27/10/2020
TIME: 08:30
LOCAL: Através da sala do Google Meet
TITLE:

SOIL OF ATTRIBUTES STUDY AND RIVER WATER QUALITY UNDER NATIVE AÇAIZAIS IN THE EASTERN AMAZON

KEY WORDS:

Euterpe Oleracea Mart, hydromorphic soils, sustainable soil management.

PAGES: 67
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Física do Solo
SUMMARY:

The açaizeiro (Euterpe Oleracea Mart.) is native to the Brazilian Amazon whose natural habitat is hydromorphic soil ecosystems that drain twice a day. The objective was to evaluate the floodplain systems by means of the chemical, physical and biological attributes of hydromorphic soils in areas of native açaizais, in addition to the chemical characteristics of the water quality of the river in order to contribute to the maintenance, preservation and proper management of these ecosystems. . The study was carried out in three areas of native açaizal on the Saracá Island belonging to the municipality of Limoeiro do Ajurú, in the region of Baixo Tocantins. 60 soil samples were collected with deformed structures in two pluviometric periods (n = 10) and 60 undisturbed samples (n = 20) at a depth of 0-10 cm. The deformed samples were used to determine the physical characteristics of the soil and the deformed samples were used for the analysis of texture and chemical and biological attributes of the soil, both were developed in the soil physics, chemistry and microbiology laboratories of Ufra. The micronutrients were determined in the chemical analysis laboratory of the Emílio Goeldi Museum and the chemical quality of the river water in two pluviometric periods was analyzed at the Evandro Chagas Institute. Regarding the physical-hydric attributes of the hydromorphic soil, the three floodplain areas presented a silt loam texture, good water retention in potential critics and a high index of soil aggregation, promoting these areas good structure, already taking into account the chemical attributes of the soil and water in the two pluviometric periods, the iron content in the soil was higher in the less rainy period, while manganese decreased in the same period. Calcium and magnesium increased while phosphorus and potassium did not increase significantly in relation to the two periods. The levels of metals found in the river water of the three areas are in accordance with the reference values established by CONAMA, only iron in the very rainy period in the central floodplain obtained a higher value. In relation to biological attributes, the low metabolic coefficient indicates savings in energy use and, supposedly, reflects a more stable environment or closer to its equilibrium state. The soil of the three floodplain areas has good nutrient availability, energy savings used by microorganisms and excellent soil water retention and aggregation that configures the floodplain ecosystem to natural chemical, physical and biological conditions favorable to the production and maintenance of native açaí groves and the quality of the river water considered suitable for consumption by riverside dwellers.

BANKING MEMBERS:
Interna - 2494920 - ANTONIA BENEDITA DA SILVA BRONZE
Externo à Instituição - ANTONIO CLEMENTINO DOS SANTOS - UFT
Presidente - 1551186 - HERDJANIA VERAS DE LIMA
Externa ao Programa - 1741065 - VANIA SILVA DE MELO