Data/hora: 06/06/2024 14:08:23

Biblioteca(s): | Embrapa Agricultura Digital.
Data corrente: | 28/04/2009
Data da última atualização: | 01/12/2010
Autoria: | STRECK, N. A.
Afiliação: | NEREU AUGUSTO STRECK, UFSM.
Título: | Leaf appearance rate in Alexander grass (Brachiaria plantaginea) and morning glory (Ipomoea triloba) weeds.
Ano de publicação: | 2006
Fonte/Imprenta: | Revista Brasileira de Agrometeorologia, Piracicaba, v. 14, n. 2, p. 248-251, 2006.
Idioma: | Português
Notas: | Nota Técnica.
Conteúdo: | The objective of this study was to determine the leaf appearance rate (LAR) based on thermal time in Alexander grass (Brachiaria plantaginea) and mornig glory (Ipomoea triloba) weeds. A field experiment was conducted at Santa Maria, RS, Brazil. Ten two-leaf seedings of each species were transplanted on 27 October 2003 and grown without water stress. The main stem Haun Stage (HS) in Alexander grass and the main stem leaf number (MSL) in morning glory were measured twice a week. Daily degree days (STdi, oC.d) were calculated by accumulating STdi. The number of leaves (HS and MSL) was linearly regressed against TT. The slope of the linear regression in the LAR (leaves/oC.d) and the phyllochron (oCd/leaf) was estimated by the inverse of the slope of the linear regression. The LAR was lower in Alexander grass (0.0262 leaves/oC.d) than in morning glory (0.0508 leaves/oC.d).
Palavras-Chave: | Aparecimento de folhas; Filocrono; Graus-dia; Soma térmica; Taxa de aparecimento de folhas.
Categoria do assunto: | --
Registro original: | Embrapa Agricultura Digital (CNPTIA)
Exemplares: | CNPTIA - (12851-1) - ADD - AP - PP -  -  -  - DIS