Data/hora: 12/06/2024 15:49:07

Provedor de dados: | 86
País: | Brazil
Título: | Soil water dynamics and evapotranspiration of forage cactus clones under rainfed conditions
Autores: | Silva,Thieres George Freire da; Primo,Jorge Torres Araújo; Moura,Magna Soelma Beserra de; Silva,Sérvulo Mercier Siqueira e; Morais,José Edson Florentino de; Pereira,Poliana de Caldas; Souza,Carlos André Alves de.
Data: | 2015-07-01
Ano: | 2015
Palavras-chave: | Nopalea; Opuntia CAM photosynthetic pathway evapotranspiration.
Resumo: | Abstract: The objective of this work was to evaluate soil water dynamics in areas cultivated with forage cactus clones and to determine how environmental conditions and crop growth affect evapotranspiration. The study was conducted in the municipality of Serra Talhada, in the state of Pernambuco, Brazil. Crop growth was monitored through changes in the cladode area index (CAI) and through the soil cover fraction, calculated at the end of the cycle. Real evapotranspiration (ET) of the three evaluated clones was obtained as the residual term in the soil water balance method. No difference was observed between soil water balance components, even though the evaluated clones were of different genus and had different CAI increments. Accumulated ET was of 1,173 mm during the 499 days of the experiment, resulting in daily average of 2.35 mm. The CAI increases the water consumption of the Orelha de Elefante Mexicana clone. In dry conditions, the water consumption of the Miúda clone responds more slowly to variation in soil water availability. The lower evolution of the CAI of the IPA Sertânia clone, during the rainy season, leads to a higher contribution of the evaporation component in ET. The atmospheric demand controls the ET of clones only when there is higher soil water availability; in this condition, the water consumption of the Miúda clone decreases more rapidly with the increase of atmospheric demand.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000700515

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2015000700001
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.50 n.7 2015
Fonte: | info:eu-repo/semantics/openAccess