Título:	Transpiration response of upland rice to water deficit changed by different levels of eucalyptus biochar.
Autor:	PEREIRA, R. G. HEINEMANN, A. B. MADARI, B. E. CARVALHO, M. T. de M. KLIEMANN, H. J. SANTOS, A. P. dos
Afiliación:	ROGÉRIO GOMES PEREIRA, UNIVERSIDADE FEDERAL DE GOIÁS ALEXANDRE BRYAN HEINEMANN, CNPAF BEATA EMOKE MADARI, CNPAF MARCIA THAIS DE MELO CARVALHO, CNPAF HUBERTO JOSE KLIEMANN, UNIVERSIDADE FEDERAL DE GOIÁS AURÉLIO PEREIRA DOS SANTOS, CNPAF.
Año:	2012
Referencia:	Pesquisa Agropecuária Brasileira, v. 47, n. 5, p. 716-721, maio 2012.
Descripción:	The objective of this work was to evaluate the effect of eucalyptus biochar on the transpiration rate of upland rice 'BRSMG Curinga' as an alternative means to decrease the effect of water stress on plant growth and development. Two-pot experiments were carried out using a completely randomized block design, in a split-plot arrangement, with six replicates. Main plots were water stress (WS) and no-water stress (NWS), and the subplots were biochar doses at 0, 6, 12 and 24% in growing medium (sand). Total transpirable soil water (TTSW), the p factor - defined as the average fraction of TTSW which can be depleted from the root zone before water stress limits growth-, and the normalized transpiration rate (NTR) were determined. Biochar addition increased TTSW and the p factor, and reduced NTR. Consequently, biochar addition was able to change the moisture threshold (p factor) of the growing medium, up to 12% maximum concentration, delaying the point where transpiration declines and affects yield.
Thesagro:	Arroz Oryza sativa Eucalipto Deficiência hídrica
NAL Thesaurus:	biochar
Palabras clave:	Estresse abiótico
DOI:	https://doi.org/10.1590/S0100-204X2012000500012
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CNPAF)