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Nitrogen dynamics in a cultivation system using Brachiaria as cover plants

Grant number: 16/12336-1
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): August 01, 2016
Effective date (End): December 20, 2016
Field of knowledge:Agronomical Sciences - Agronomy - Soil Science
Acordo de Cooperação: BBSRC, UKRI ; CONFAP ; Newton Fund, with FAPESP as a partner institution in Brazil
Principal Investigator:Ciro Antonio Rosolem
Grantee:Thiago Assis Rodrigues Nogueira
Host Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil
Associated research grant:15/50305-8 - A virtual joint centre to deliver enhanced nitrogen use efficiency via an integrated soil-plant systems approach for the UK & Brazil, AP.TEM


There is evidence that Brachiaria ruziziensis affects nitrogen dynamics in the soil by modifying microbiota composition, affecting maize response to the fertilizer. This project will deepen studies on the N fate in the soil in the presence of B. ruziziensis and other grasses, considering deep leaching and gaseous losses. The objective is to understand N dynamics and determine N fate in cropping systems using grasses as cover crops, as well as its effects on maize response to N. A field experiment will be conducted using different grasses in rotation with soybean and maize. Maize response to N will be assessed. Nitrogen dynamics in the system will be studied using 15N labeled fertilizer; N leaching will be determined by analyzing soil solution 80 cm deep in the soil profile and water deep drainage, N emissions as ammonium and nitrous oxide will be monitored. (AU)

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