Data/hora: 04/06/2024 07:21:34

Biblioteca(s): | Embrapa Soja.
Data corrente: | 28/10/2011
Data da última atualização: | 31/07/2017
Autoria: | SOUZA, P. J. de O. PONTE de; RIBEIRO, A.; ROCHA, E. J. P. da; BOTELHO, M. do N.; SOUSA, A. M. L. de; SOUZA, E. B. de; FARIAS, J. R. B.
Afiliação: | PAULO JORGE DE OLIVEIRA PONTE DE SOUZA, CNPSo; ARISTIDES RIBEIRO, UFV; EDSON JOSÉ PAULINO DA ROCHA, Universidade Federal do Pará; MARCEL DO NASCIMENTO BOTELHO, Universidade Federal Rural da Amazônia; ADRIANO MARLISOM LEÃO DE SOUSA, Universidade Federal Rural da Amazônia; EVERALDO BARREIROS DE SOUZA, Universidade Federal do Pará; JOSE RENATO BOUCAS FARIAS, CNPSO.
Título: | Impacts of soyabean expansion on the Amazon energy balance: a case study.
Ano de publicação: | 2011
Fonte/Imprenta: | Experimental Agriculture, Cambridge, v. 47, n. 3, p. 553-567, 2011.
ISSN: | 0014-4797
Idioma: | Inglês
Conteúdo: | A micrometeorological experiment was carried out in an area of soyabean cultivation located in northeastern Para state, Brazil, in order to evaluate impacts on the local energy balance due to replacement of forests by soyabean. The meteorological data from forest ecosystems were collected in Caxiuanã forests located in central Para. The energy balance components were obtained using the Bowen ratio technique. Differences in energy balance components between ecosystems were significant during the soyabean growing season and more significant between growing seasons. During the soyabean growing season mean impacts of ?15%, ?9% and ?27% on net radiation, latent heat flux (LE) and sensible heat flux (H), respectively, were observed. At specific soyabean stages, LE was higher than in the forest because of the high soyabean surface conductance of water vapour.However, during the production off-season the impacts were more significant (p < 0.05), showing a reduction of 78% in LE and a substantial increase in H (84%) because of the absence of vegetation cover over this period.
Thesagro: | Energia.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)
Exemplares: | CNPSO - (32409-1) - UPC - AP - PP - 12013 -  - 12013 - DIS