Water use in a sugarcane plantation

Cabral, Osvaldo M.R.; Rocha, Humberto R.; Gash, John H.; Ligo, Marcos A.V.; Tatsch, Jonatan D.; Freitas, Helber C.; Brasilio, Emília. 2012 Water use in a sugarcane plantation. Global Change Biology Bioenergy, 4 (5). 555-565.

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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).

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: CEH Topics & Objectives 2009 - 2012 > Water
UKCEH and CEH Sections/Science Areas: UKCEH Fellows
ISSN: 1757-1693
Additional Information. Not used in RCUK Gateway to Research.: This document is the author’s final manuscript version of the journal article, incorporating any revisions agreed during the peer review process. Some differences between this and the publisher’s version remain. You are advised to consult the publisher’s version if you wish to cite from this article.
Additional Keywords: eddy covariance, evapotranspiration, rainfall interception, soil water deficit, sugarcane, yield
NORA Subject Terms: Ecology and Environment
Date made live: 17 Jan 2013 15:14 +0 (UTC)

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