Water use in a sugarcane plantation

Autor(es)

Cabral, Osvaldo M. R. ^[1] ; Rocha, Humberto R. ^[2] ; Gash, John H. ^{[3, 4]} ; Ligo, Marcos A. V. ^[1] ; Tatsch, Jonatan D. ^[2] ; Freitas, Helber C. ^[2] ; Brasilio, Emilia ^[2]

Afiliação do(s) autor(es)

^[1] Embrapa Meio Ambiente, BR-13820000 Jaguariuna, SP - Brazil

^[2] Univ Sao Paulo, BR-05508090 Sao Paulo - Brazil

^[3] Ctr Ecol & Hydrol, Wallingford OX10 8BB, Oxon - England

^[4] Vrije Univ Amsterdam, NL-1081 HV Amsterdam - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: Global Change Biology Bioenergy; v. 4, n. 5, p. 555-565, SEP 2012.
• Citações Web of Science: 21

Resumo

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 similar to days) and third year (374 similar to days) re-growth (ratoon). The total E in the first cycle was 829 similar to mm, accounting for 69% of rainfall, whereas in the second cycle, it was 690 similar to mm, despite the total rainfall (1353 similar to 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 similar to mm, respectively, accounting for approximately 7% of the total rainfall. The sugarcane yield in the second cycle (61.5 similar to +/-similar to 4.0 similar to t similar to ha-1) was 26% lower than the first cycle, as well as lower than the regional average for the third ratoon (76 similar to t similar to 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 similar to days of re-growth in the second cycle being 16% of that recorded in the first (203 similar to mm). (AU)

• Processo FAPESP: 08/58120-3 - Carbon tracker and water availability controls of land use and climate changes
• Beneficiário: Humberto Ribeiro da Rocha
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático