Data/hora: 11/06/2024 20:24:06

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 19/09/2018
Data da última atualização: | 21/09/2018
Autoria: | FARIAS, P. dos S. de; SOUZA, L. da S.; PAIVA, A. DE Q.; OLIVEIRA, Á. S. de; SOUZA, L. D.; LEDO, C. A. da S.
Afiliação: | POLIANNA DOS SANTOS DE FARIAS, UFRB; LUCIANO DA SILVA SOUZA, UFRB; ARLICÉLIO DE QUEIROZ PAIVA, UESC; ÁUREO SILVA DE OLIVEIRA, UFRB; LAERCIO DUARTE SOUZA, CNPMF; CARLOS ALBERTO DA SILVA LEDO, CNPMF.
Título: | Hourly, daily, and monthly soil temperature fluctuations in a drought tolerant crop.
Ano de publicação: | 2018
Fonte/Imprenta: | Revista Brasileira de Ciência do Solo, v. 42, e0170221, 2018.
ISSN: | 1806-9657
DOI: | 10.1590/18069657rbcs20170221
Idioma: | Inglês
Conteúdo: | Soil temperature is a physical property of great agricultural importance in the soil-plant relationship and in energy exchange with the atmosphere. This study was conducted in a degraded Cambissolo Háplico Ta Eutrófico (Cambisol; Inceptisol) in the Irecê Identity Territory, Bahia, Brazil, aiming to evaluate the hourly, daily, and monthly fluctuations of soil temperature at depth, and soil thermal diffusivity in the castor bean crop. Hourly soil temperature data from February 4, 2014, to September 30, 2015, were obtained by using thermocouple sensors (copper-constantan) horizontally installed at 0.05, 0.10, and 0.20 m depths. Soil thermal diffusivity was estimated by phase and amplitude methods. Results showed that, for most days, the soil temperature was at the level recommended for castor bean. The maximum and minimum hourly and daily soil temperatures were observed in October and July, respectively, and the maximum soil temperature values occurred at 4 p.m. (0.05 m), 5 p.m. (0.10 m), and 7 p.m. (0.20 m). Soil temperature variability is low, requiring few measurement points to estimate this factor in an area. The amplitude method led to soil thermal diffusivity values compatible with results in the literature. The absence of a relationship between thermal diffusivity and soil moisture was attributed to the clay-loam soil texture, predominance of micropores, and iron oxides allowing greater approximation to the soil particles, with high thermal diffusivity even under low soil moisture conditions.
Thesagro: | Solo.
Thesaurus Nal: | Soil.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (32488-1) - UPC - AP - DD - Publicação digital -  -  - DIS