Data/hora: 06/06/2024 12:05:31

Biblioteca(s): | Embrapa Amazônia Oriental; Embrapa Unidades Centrais.
Data corrente: | 24/04/2001
Data da última atualização: | 25/01/2021
Autoria: | DIAS FILHO, M. B.
Afiliação: | MOACYR BERNARDINO DIAS FILHO, CPATU.
Título: | Growth and biomass allocation of the C4 grasses Brachiaria brizantha and B. humidicola under shade.
Ano de publicação: | 2000
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 12, p. 2335-2341, dez. 2000.
Idioma: | Inglês
Conteúdo: | The growth and biomass allocation responses of the tropical forage grasses Brachiaria brizantha cv. Marandu and B. humidicola were compared for plants grown outdoors, in pots, in full sunlight and those shaded to 30% of full sunlight over a 30day period. The objective was to evaluate the acclimation capacity of these species to low light. Both species were able to quickly develop phenotypic adjustments in response to low light. Specific leaf area and leaf area ratio were higher for low-light plants during the entire experimental period. Low-light plants allocated significantly less biomass to root and more to leaf tissue than high-light plants. However, the biomass allocation pattern to culms was different for the two species under low light: it increased in B. brizantha, but decreased in B. humidicola, probably as a reflection of the growth habits of these species. Relative growth rate and tillering were higher in high-light plants. Leaf elongation rate was significantly increased on both species under low light; however, the difference between treatments was higher in B. brizantha. These results are discussed in relation to the pasture management implications.
Palavras-Chave: | Área foliar específica; Feed grasses; Growth rate; Light regimes; Regime de luz; Specific leaf area.
Thesagro: | Área Foliar; Biomassa; Gramínea Forrageira; Pastagem; Taxa de Crescimento.
Thesaurus Nal: | Biomass; leaf area; Pastures; Specific growth rate.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/18877/1/pab20_083.pdf
Registro original: | Embrapa Amazônia Oriental (CPATU)

Exemplares:

AI-SEDE - (18877-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS
CPATU - (3275-1) - UPC - AP - PP - 630.5 - P472 - 073 - DIS