Banca de DEFESA: THIAGO REZENDE LIMA DO CARMO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : THIAGO REZENDE LIMA DO CARMO
DATE: 30/06/2023
TIME: 08:30
LOCAL: VIDEOCONFERÊNCIA
TITLE:

Nitrogen, Phosphorus, and Potassium Balance in Brazilian Agriculture and Livestock, period between 2000 and 2020

KEY WORDS:

Nutrient consumption, nutrient output, agricultural sustainability.

PAGES: 172
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SUMMARY:

Agricultural and livestock production in Brazil is increasing significantly. The harvested area of agricultural crops has increased by 64% in the last three decades, reaching 83 million hectares in 2020. Additionally, there have been improvements in agricultural productivity and an increase in animal production (IBGE, 2022), leading to a higher volume of agricultural inputs being used. The objective of this study was to calculate the balance of N, P, and K in Brazilian agriculture between the years 2000 and 2020, using the OECD recommendations (2007ab) and making adaptations to the national reality. The inputs considered in the balance included synthetic fertilizers, vinasse, swine and poultry manure applied as organic fertilizers, biological nitrogen fixation, seed and seedling use for planting, and atmospheric deposition. The outputs considered were the production of all 65 agricultural crops currently accounted by IBGE (2022) and beef production. The balance of N, P, and K in Brazilian agriculture records surpluses in all the years studied, which, although it may contribute to environmental pollution risks, is explained and justified by the significant impact of national agriculture on global environmental security, in a context where a large portion of soils have low nutrient levels. Regarding nitrogen, it is observed that Brazilian agriculture is dependent on the process of biological nitrogen fixation, as approximately 50% of the N input is derived from this source. For P and K, the application of synthetic fertilizers is the main input source for these nutrients in the balance, accounting for approximately 85% and 70%, respectively.

COMMITTEE MEMBERS:
Interno - 2213075 - EVERALDO ZONTA
Externo à Instituição - JOSE CARLOS POLIDORO - UFRRJ
Presidente - ***.898.198-** - SEGUNDO SACRAMENTO URQUIAGA CABALLERO - EMBRAPA