Data/hora: 10/06/2024 18:35:56

Provedor de dados: | 190
País: | Brazil

Título:

Biomass and seasonality of fine roots of Eastern Amazon  Savannas

Biomassa e sazonalidade das raízes finas em savanas da Amazônia Oriental

Autores: | Braga, Elayne Oliveira; Rocha, Antônio Elielson Sousa; Costa Neto, Salustiano Vilar; Lima, Tâmara Thaiz Santana; Costa, Luiz Gonzaga Silva; Miranda, Izildinha de Souza.
Data: | 2017-12-29
Ano: | 2017
Palavras-chave: | Dry season; Root systems; Rhizosphere Recursos Florestais Estação seca; Sistema radicular; Rizosfera.
Resumo: | The objective of this work was to compare the biomass of fine roots in different physiognomies evaluating the influence of seasonality at the Amazon savannas located in Amapá and Pará States. Soil samples were collected in five positions, from 10 to 50 cm deep. Three points were allocated at typical savanna (Cerrado sensu stricto), 4 at open savanna (Campo Cerrado) and 2 at natural grassland (Campo Limpo). At each point 4 replications were performed. The influence of seasonality was verified only in Campo Cerrado in April (rainfall peak), July (end of rainy season) and October (peak of drought) of 2010 and in January of 2011 (beginning of rainy season). The physiognomies were differentiated by root mass when analyzed under different diametric classes of roots and different depths. The largest mass of fine roots occurred at the peak of the dry season. These results suggest different strategies in finest roots allocation in different physiognomies and soil depths and differences of roots dynamics to increase absorption potential during dry season.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Português

Identificador:

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1382

10.4336/2017.pfb.37.92.1382

Editor: | Embrapa Florestas

Relação:

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1382/606

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/downloadSuppFile/1382/1028

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/downloadSuppFile/1382/1029

Formato: | application/pdf

Fonte:

Pesquisa Florestal Brasileira; v. 37, n. 92 (2017): out./dez.; 475-483

Brazilian Journal of Forestry Research; v. 37, n. 92 (2017): out./dez.; 475-483

1983-2605

1809-3647

Fonte: | http://creativecommons.org/licenses/by-nc-nd/4.0