Data/hora: 10/06/2024 02:50:29

Biblioteca(s): | Embrapa Meio Ambiente.
Data corrente: | 28/02/2013
Data da última atualização: | 28/02/2013
Autoria: | CABRAL, O. M. R.; ROCHA, H. R. da; GASH, J. H.; LIGO, M. A. V.; TATSCH, J. D.; FREITAS, H. C. de; BRASILIO, E.
Afiliação: | OSVALDO MACHADO RODRIGUES CABRAL, CNPMA; HUMBERTO R. ROCHA, USP; JOHN H. GASH, Centre for Ecology and Hydrology; MARCOS ANTONIO VIEIRA LIGO, CNPMA; J O N A T A N D . T A T S C H, USP; H E L B E R C . F R E I T A S, USP; E M I L I A B R A S I L I O, USP.
Título: | Water use in a sugarcane plantation.
Ano de publicação: | 2012
Fonte/Imprenta: | Global Change Biology. Bioenergy, Oxford, v. 4, p. 555-565, 2012.
Idioma: | Inglês
Conteúdo: | Abstract: The evapotranspiration (E) from a sugarcane plantation in the southeast Brazil was measured by the eddy-covariance method during two consecutive cycles. These represented the second (393 days) and third year (374 days) re-growth (ratoon). The total E in the first cycle was 829 mm, accounting for 69% of rainfall, whereas in the second cycle, it was 690 mm, despite the total rainfall (1353 mm) being 13% greater. The ratio of E to available energy, the evaporative fraction, exhibited a smaller variation between the first and second cycles: 0.58 and 0.51, respectively. The estimated interception losses were 88 and 90 mm, respectively, accounting for approximately 7% of the total rainfall. The sugarcane yield in the second cycle (61.5 ± 4.0 t ha -¹) was 26% lower than the first cycle, as well as lower than the regional average for the third ratoon (76 t ha -¹). The below average yield was associated with less available soil water at the beginning of the cycle, with the amount of rainfall recorded during the first 120 days of re-growth in the second cycle being 16% of that recorded in the first (203 mm).
Palavras-Chave: | Rainfall interception.
Thesagro: | Água; Cana de açúcar; Evapotranspiração.
Thesaurus Nal: | eddy covariance; Evapotranspiration; Soil water deficit; Sugarcane.
Categoria do assunto: | --
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (12105-1) - UPC - AP - DD -  -  -  - DIS