Influence of nitrogenated fertilization with biosolid and mineral fertilizer on the fluxes of greenhouse effect gases in the soil in an area under successive forest rotation

• Grant number: 04/01197-3
• Support Opportunities: Regular Research Grants
• Start date: June 01, 2004
• End date: September 30, 2006
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Marisa de Cassia Piccolo
• Grantee: Marisa de Cassia Piccolo
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

In areas under successive rotations of forest plantations the deficiency of nitrogen (N) in the soil can become a limiting factor in the production, requiring high doses of nitrogen in the maintenance of the stocks of this element in the soil and nutrition of the plants. The application of biosolid (sewage sludge) is an alternative that has been increasingly studied for fertilization of areas with forest plantation, offering good results in terms of development of the trees, although little is known about the effects of this practice on the fluxes of greenhouse effect gases in the soil and the mineralization of N. The objective of this project is to study in a forest area populated with Eucalyptus grandis, after successive rotations (6th rotation): the influence of mineral and organic (biosolid) fertilizer used as sources of N on the fluxes of important soil greenhouse effect gases (CO2, N2O and CH4); the availability of mineral N (NH4+ and NO3-) and its rate ofmineralization; and the stocks of total carbon and nitrogen in the soil during the first 12 months of the development of the trees. (AU)