Impact of increasing mean air temperature on the development of rice and red rice

Authors

  • Isabel Lago Universidade Federal de Santa Maria
  • Nereu Augusto Streck Universidade Federal de Santa Maria
  • Cleber Maus Alberto Universidade Federal de Santa Maria
  • Felipe Brendler Oliveira Universidade Federal de Santa Maria
  • Gizelli Moiano de Paula Universidade Federal de Santa Maria

DOI:

https://doi.org/10.1590/S1678-3921.pab2008.v43.657

Keywords:

<i>Oryza sativa</i>, global warming, phenology, simulation, weeds

Abstract

The objective of this study was to assess the development response of cultivated rice and red rice to different increases in minimum and maximum daily air temperatures, in Santa Maria, Rio Grande do Sul State, Brazil. One hundred years climate scenarios of temperatures 0, +1, +2, +3, +4, and +5oC, with symmetric and asymmetric increases in minimum and maximum daily air temperatures were created, using the LARS-WG Weather Generator, and a 1969–2003 database. Nine cultivated rice genotypes (IRGA 421, IRGA 416, IRGA 417, IRGA 420, BRS 7 TAIM, BR-IRGA 409, EPAGRI 109, EEA 406 and a hybrid), and two red rice biotypes (awned black hull-ABHRR, and awned yellow hull-AYHRR) were used. The dates of panicle differentiation (R1), anthesis (R4), and all grains with brown hulls (R9) were estimated with a nonlinear simulation model. Overall, the duration of the emergence–R1 phase decreased, whereas the duration of the R1–R4 and R4–R9 phases most often increased, as temperature increased in the climate change scenarios. The simulated rice development response to elevated temperature was not the same, when the increase in minimum and maximum temperature was symmetric or asymmetric.

Author Biographies

Isabel Lago, Universidade Federal de Santa Maria

Programa de Pós-graduação em Engenharia Agricola/UFSM - Agrometeorologia

Nereu Augusto Streck, Universidade Federal de Santa Maria

Departamento de Fitotecnia Setor de Agrometeorologia Universidade Federal de Santa Maria

Cleber Maus Alberto, Universidade Federal de Santa Maria

Programa de Pós-graduação em Engenharia Agrícola/UFSM - Agrometeorologia

Felipe Brendler Oliveira, Universidade Federal de Santa Maria

Agronomia/UFSM - Agrometeorologia

Gizelli Moiano de Paula, Universidade Federal de Santa Maria

Programa de Pós-graduação em Engenharia Agrícola/UFSM - Agrometeorologia

Published

2008-12-05

How to Cite

Lago, I., Streck, N. A., Alberto, C. M., Oliveira, F. B., & Paula, G. M. de. (2008). Impact of increasing mean air temperature on the development of rice and red rice. Pesquisa Agropecuaria Brasileira, 43(11), 1441–1448. https://doi.org/10.1590/S1678-3921.pab2008.v43.657

Issue

Section

AGROMETEOROLOGY