Banca de DEFESA: ANDRESSA SILVA DE OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANDRESSA SILVA DE OLIVEIRA
DATE: 22/02/2022
TIME: 14:00
LOCAL: Defesa remota pelo Google Meet
TITLE:

Glomalin and enzymes involved in biogeochemical cycling in soils in forage areas in the Caatinga biome

KEY WORDS:

Semi-arid, pasture, soil quality, land use change.

PAGES: 93
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SUMMARY:

The conversion of natural ecosystems into pastures can cause changes in soil properties and quality. Monitoring enzymatic activity and soil proteins related to glomalin are sensitive soil microbial parameters to detect environmental changes. Due to their abundance and ability to provide quick responses to environmental disturbances, they can be considered biological indicators capable of providing integrated information on the biogeochemical cycling of elements in the soil. Thus, the present study aimed to evaluate the impact of different grazing systems and seasonal variation on soil enzymatic activities in the Brazilian semiarid region. The study was carried out in research units located in IPA experimental stations, located in five municipalities in Pernambuco. Each unit consists of plots of 625m2 with and without the exclusion of animals, allocated in areas with the three main types of vegetation cover used for livestock purposes in the biome: closed caatinga, open caatinga and pasture. Single samples were collected at six random points at a depth of 0-20 cm. Sampling and determination of enzyme activities will be carried out in the rainy season and in the dry season to understand the seasonal dynamics of the activities of these biological attributes In the samples, chemical and physical attributes were determined, the activities of β-glucosidase, urease and of acid phosphatase and the amounts of soil proteins related to glomalin.

BANKING MEMBERS:
Presidente - 457.055.504-72 - ANA DOLORES SANTIAGO DE FREITAS - UFRPE
Externo à Instituição - PAULO IVAN FERNANDES JÚNIOR
Externo à Instituição - UEMESON JOSÉ DOS SANTOS