Banca de DEFESA: CARINE HEMKEMEIER

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CARINE HEMKEMEIER
DATA : 29/03/2022
HORA: 13:30
LOCAL: Ambiente presencial e virtual
TÍTULO:

Phosphorus fractionation and soil attributes in different uses in the southern Amazon.

PALAVRAS-CHAVES:

agroecosystems, soil quality, phosphorus fractions

PÁGINAS: 95
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Ciência do Solo
ESPECIALIDADE: Fertilidade do Solo e Adubação
RESUMO:

The soils of southern Amazonia undergo modifications for the implementation of agriculture, livestock and forestry, and in general, these are poorly managed. And as these are naturally acidic and deficient in nutrients, due to accelerated weathering and the processes of soil formation, continue to affect their characteristics over the years, with all this, the quality of the soil is constantly altered. To know which managements were or are being less harmful to soils, we can study their attributes. In this way, the present work aimed to evaluate the quality of the soil through its chemical and physical characteristics, in addition to carrying out the study of the fractionation of phosphorus together with the microbial activity of the soil, in different uses that consisted of pasture areas, natural regeneration, tillage, forestry with teak production and forest fragment, in the south of the Amazon. We evaluate the physical attributes through porosity, density and penetration resistance; biological indicators by soil basal respiration, microbial biomass carbon, metabolic quotient and acid phosphatase; the chemicals were evaluated by the analysis of soil acidity, nutrient saturation, aluminum and hydrogen contents, organic matter, exchangeable calcium, exchangeable magnesium, exchangeable potassium and phosphorus. Due to the importance of phosphorus for crops and its deficiency in this region, its fractionation in the soil was evaluated. Most characteristics are influenced by management, where certain practices benefit the chemical characteristics of the soil, while others harm certain characteristics, mainly physical and microbiological characteristics.

MEMBROS DA BANCA:
Presidente - 117000004 - MARCO ANTONIO CAMILLO DE CARVALHO
Interno - 210865003 - GUSTAVO CAIONE
Externo à Instituição - PAULO SÉRGIO PAVINATO - USP