Data/hora: 10/06/2024 12:11:41

Provedor de dados: | Pesquisa Agropecuária Brasileira
País: | Brazil
Título: | Transpiration response of upland rice to water deficit changed by different levels of eucalyptus biochar
Autores: | Pereira,Rogério Gomes; Heinemann,Alexandre Bryan; Madari,Beata Emoke; Carvalho,Marcia Thais de Melo; Kliemann,Huberto José; Santos,Aurélio Pereira dos.
Data: | 2012-05-01
Ano: | 2012
Palavras-chave: | Eucalyptus; Oryza sativa; Abiotic stress; Water deficit.
Resumo: | 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500012

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2012000500012
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.47 n.5 2012
Fonte: | info:eu-repo/semantics/openAccess