Data/hora: 02/06/2024 04:47:44

Provedor de dados: 	Planta Daninha	
País: 	Brazil	
Título: 	Water use efficiency of cassava plants under competition conditions	
Autores: 	Aspiazú,I; Sediyama,T; Ribeiro Jr,J.I; Silva,A.A; Concenco,G; Ferreira,E.A; Galon,L; Silva,A.F; Borges,E.T; Araujo,W.F.	
Data: 	2010-12-01	
Ano: 	2010	
Palavras-chave: 	Bidens pilosa; Commelina benghalensis; Brachiaria plantaginea; Interference.	
Resumo: 	The objective of this work was to evaluate characteristics associated with the photosynthetic activity of cassava plants in competition with weeds or not. The trial was performed on open environment conditions, with experimental units consisting of fiber glass vases with 150 dm³ filled with Red Yellow Latosol, previously fertilized. Treatments consisted in the cultivation of cassava plants isolated and associated to three weed species (Bidens pilosa, Commelina benghalensis and Brachiaria plantaginea). After cassava shooting, 15 days after planting, a removal of the weeds excess was performed, sown at the time of cassava planting, leaving six plants m-2 of B. pilosa and four plants m-2 of C. benghalensis and B. plantaginea. At 60 days after emergence (DAE), stomatal conductance (Gs), vapor pressure in the substomatal cavity (Ean), temperature gradient between leaf and air (ΔT), transpiration rate (E) and water use efficiency (WUE) were evaluated. B. pilosa showed greater capacity to affect growth of cassava plants. B. plantaginea is very efficient in using water, especially by presenting C4 metabolism, and remains competitive with cassava even under temporarily low water status. C. benghalensis, in turn, is not a good competitor for light and apparently is not the primary cause of water depletion in the soil. The effects of weeds, in this case, were more associated with the competition. However, they were found between moderate to low. This implies that the competition established at experimental level was low.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000400001	
Editor: 	Sociedade Brasileira da Ciência das Plantas Daninhas	
Relação: 	10.1590/S0100-83582010000400001	
Formato: 	text/html	
Fonte: 	Planta Daninha  v.28 n.4 2010	
Fonte: 	info:eu-repo/semantics/openAccess