Banca de QUALIFICAÇÃO: WESLEY DOS SANTOS SOUZA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : WESLEY DOS SANTOS SOUZA
DATE: 17/11/2021
TIME: 09:00
LOCAL: videoconferência
TITLE:

Soil carbon and nitrogen dynamics under cultivation of Marandu grass (Urochloa brizantha cv. Marandu) in monoculture and intercropped with forage legume

KEY WORDS:

¹³C abundance, Arachis pintoi, Carbon sequestration

PAGES: 20
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Brazil as a great world power in agriculture has a large part of its territory occupied by pastures. However, a good part of these areas are in a monoculture system and in degradation processes, or that directly affect the soil's carbon and nitrogen pool, which can cause their reductions and consequent CO2 emission. With the capacity of carbon sequestration from these areas, it may be limited by the low accumulation of aboveground biomass in these systems, due to the deficiency of nutrients in the soil and, especially, by the low availability of nitrogen. Therefore, the use of legumes in this system makes it possible to increase the availability of nitrogen in the soil-plant-animal system. Thus, the use of a legume intercropping system could contribute to increases in soil carbon sequestration, and the consequent reduction in the emission of greenhouse gases. And for a better assessment of the contribution of this system using a temporal assessment with soil sample collections close to the sampling points of previous years is necessary. To prove these hypotheses, the study will evaluate the effects of the implantation of brachiaria pasture in a monoculture fertilized with nitrogen or intercropped with forage legume on the soil carbon and nitrogen pool and determine a variation in the contribution of carbon derived from brachiaria and legume by through the determination of the natural abundance of ¹³C and also to verify the spatial variability of the soil carbon contents, with the carrying out of soil collection at sampling points at different distances from the site of the first collection period.

BANKING MEMBERS:
Interno - 681.282.827-00 - BRUNO JOSÉ RODRIGUES ALVES - EMBRAPA
Externo à Instituição - CAIO DE TEVES INÁCIO - EMBRAPA
Interna - 1740899 - ERIKA FLAVIA MACHADO PINHEIRO
Presidente - 058.898.198-28 - SEGUNDO SACRAMENTO URQUIAGA CABALLERO - EMBRAPA