Data/hora: 09/06/2024 05:33:44

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 08/02/2011
Data da última atualização: | 09/05/2018
Autoria: | STRECK, N. A.; LANGNER, J. A.; LAGO, I.
Afiliação: | Nereu Augusto Streck, Universidade Federal de Santa Maria; Josana Andréia Langner, Universidade Federal de Santa Maria; Isabel Lago, Universidade Federal de Santa Maria.
Título: | Maize leaf development under climate change scenarios.
Ano de publicação: | 2010
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 11, p. 1227-1236, nov. 2010
Idioma: | Inglês
Notas: | Título em português: Desenvolvimento foliar de milho em cenários de mudanças climáticas.
Conteúdo: | The objective of this work was to simulate maize leaf development in climate change scenarios at Santa Maria, RS, Brazil, considering symmetric and asymmetric increases in air temperature. The model of Wang & Engel for leaf appearance rate (LAR), with genotype-specific coefficients for the maize variety BRS Missões, was used to simulate tip and expanded leaf accumulated number from emergence to flag leaf appearance and expansion, for nine emergence dates from August 15 to April 15. LAR model was run for each emergence date in 100-year climate scenarios: current climate, and +1, +2, +3, +4 and +5°C increase in mean air temperature, with symmetric and asymmetric increase in daily minimum and maximum air temperature. Maize crop failure due to frost decreased in elevated temperature scenarios, in the very early and very late emergence dates, indicating a lengthening in the maize growing season in warmer climates. The leaf development period in maize was shorter in elevated temperature scenarios, with greater shortening in asymmetric temperature increases, indicating that warmer nights accelerate vegetative development in maize.
Palavras-Chave: | Aparecimento de folha; Aquecimento global; Desenvolvimento vegetativo; Elevated temperature; Frost risk; Leaf appearance; Risco de geada; Temperatura elevada; Vegetative development.
Thesagro: | Zea Mays.
Thesaurus Nal: | global warming.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/105649/1/Maize-leaf.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (48804-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS