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Nitrogen dynamics in a production system using Brachiaria as a cover plant

Grant number: 17/02517-1
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): April 01, 2017
Effective date (End): April 30, 2019
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:Eduardo Mariano
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
Associated scholarship(s):18/14218-1 - Rhizodeposition of tropical forage grasses: a 14C pulse-labeling study, BE.EP.PD


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.Objectives: 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. Work plan: 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.Justification: This project is important to understand N fate in the soil in a crop rotation very important in tropical areas. Nitrogen Use efficiency. The collaboration of a Pos-Doc will be an important part of the general project NUCLEUS, and particularly of WP3. The use of a particular grass, while important for soil conservation may impair maize response to N, decreasing... (AU)

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Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BARCELOS, JESSICA P. Q.; MARIANO, EDUARDO; JONES, DAVEY L.; ROSOLEM, CIRO A.. Topsoil and subsoil C and N turnover are affected by superficial lime and gypsum application in the short-term. SOIL BIOLOGY & BIOCHEMISTRY, v. 163, . (17/02517-1, 15/50305-8, 17/00398-5)
ROCHA, KASSIANO F.; MARIANO, EDUARDO; GRASSMANN, CAMILA S.; TRIVELIN, PAULO C. O.; ROSOLEM, CIRO A.. Fate of N-15 fertilizer applied to maize in rotation with tropical forage grasses. FIELD CROPS RESEARCH, v. 238, p. 35-44, . (15/50305-8, 16/25253-7, 17/02517-1)
GRASSMANN, CAMILA S.; MARIANO, EDUARDO; DINIZ, PRISCILA P.; BORGES, BEATRIZ M. F.; BORGES, CLOVIS D.; TSAI, SIU M.; ROSOLEM, CIRO A.. Functional N-cycle genes in soil and N2O emissions in tropical grass-maize intercropping systems. SOIL BIOLOGY & BIOCHEMISTRY, v. 169, p. 12-pg., . (15/50305-8, 16/25253-7, 17/02517-1)
GRASSMANN, CAMILA S.; MARIANO, EDUARDO; ROCHA, KASSIANO F.; GILLI, BRUNO R.; ROSOLEM, CIRO A.. Effect of tropical grass and nitrogen fertilization on nitrous oxide, methane, and ammonia emissions of maize-based rotation systems. Atmospheric Environment, v. 234, . (15/50305-8, 16/25253-7, 17/02517-1)

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