BDPA - Bases de Dados da Pesquisa Agropecuária Embrapa

Registro Completo
Biblioteca(s):  Embrapa Pantanal.
Data corrente:  14/09/1995
Data da última atualização:  10/10/2013
Autoria:  WILSON, J. R.; MANNETJE, L. 't.
Título:  Senescence, digestibility and carbohydrate content of buffel grass and green panic leaves in swards.
Ano de publicação:  1978
Fonte/Imprenta:  Australian Journal of Agricultural Research, v.29, n.3, p.503-516, 1978.
Idioma:  Inglês
Conteúdo:  Seasonal changes in the rate of production, senescence and change in dry matter digestibility (DMD), cell wall content (CWC) and non-structural carbohydrate content (TNC) of leaves of buffel grass and green panic were followed over a period of 2 years in grazed swards in a dry, subtropical environment in southern Queensland. The swards were buffel grass sown alone with (buffel plus-nitrogen) and without (buffel minus-nitrogen) nitrogen fertilizer, buffel grass/Siratro mixture and green panic/Siratro mixture. New, fully expanded leaves developed at the rate of c. one every 9-10 days in summer, 11 days in spring and 14-20 days in autumn. The overall rate of senescence of these leaves was fastest during the summer growing season and slowest during the cooler, drier conditions of autum. Leaves in the buffel plus-nitrogen and buffel/Siratro swards senesced more rapidly than those on the buffel minus-nitrogen treatment. Leaf senescence was particularly accelerated by frost in the dry season and by intermittent periods of water stress during otherwise good moisture conditions in the growing season. The DMD of recently developed leaves was generally higher in spring than in summer and autumn, and CWC showed the reserve trend. The decline in DMD of leaves as they aged was considerably higher in spring and summer (c. 0.5 unit/day) than in autumn (0.1-0.3 unit/day); these changes were proportionately greater than expected from the increase in CWC. Frosts caused a precipitous decline in... Mostrar Tudo
Palavras-Chave:  Buffel grass; Gramado; Green panic leaves; Senescence.
Thesagro:  Digestibilidade; Envelhecimento; Senescência.
Thesaurus Nal:  digestibility; sward.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Pantanal (CPAP)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status URL
CPAP29736 - 1ADDSP - --SP11941194


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