Data/hora: 09/06/2024 11:25:55

Biblioteca(s): 	Embrapa Agricultura Digital.	
Data corrente: 	05/10/2011	
Data da última atualização: 	05/01/2012	
Autoria: 	MARIN, F. R.; ANGELOCCI, L. R.	
Afiliação: 	FABIO RICARDO MARIN, CNPTIA; LUIZ ROBERTO ANGELOCCI, ESALQ/USP.	
Título: 	Irrigation requirements and transpiration coupling to the atmosphere of a citrus orchard in Southern Brazil.	
Ano de publicação: 	2011	
Fonte/Imprenta: 	Agricultural Water Management, Amsterdam, v. 98, n. 6, p. 1091-1096, 2011.	
DOI: 	10.1016/j.agwat.2011.02.002	
Idioma: 	Inglês	
Conteúdo: 	Crop evapotranspiration (ETc) was measured as evaporative heat flux from an irrigated acid lime orchard (Citrus latifolia Tanaka) using the aerodynamic method. Crop transpiration (T) was determined by a stem heat balance method. The irrigation requirements were determined by comparing the orchard evapotranspiration (ETc) and T with the reference evapotranspiration (ETo) derived from the Penman-Monteith equation, and the irrigation requirements were expressed as ETc/ETo (Kc) and T/ETo (Kcb) ratios. The influence of inter-row vegetation on the ETc was analyzed because the measurements were taken during the summer and winter, hich are periods with different regional soil water content. In this study, the average Kc values obtained were 0.65 and 0.24 for the summer and winter, respectively. The strong coupling of citrus trees to the atmosphere and the sensitivity of citrus plants to large vapor pressure de?cits and air/leaf temperatures caused variations in the Kcb in relation to the ETo ranges. During the summer, the Kcb value ranged from 0.34 when the ETo exceeded 5 mm d?1 to 0.46 when the ETo was less than 3 mm d-1 .	
Palavras-Chave: 	Acoplamento planta-atmosfera; Condutância estomática; Micrometeorologia.	
Thesagro: 	Irrigação; Microaspersão.	
Thesaurus Nal: 	Irrigation; Leaf conductance; Sprinkler irrigation; Weather.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Agricultura Digital (CNPTIA)	
Exemplares: 	CNPTIA - (15975-1) - UPC - AP - DD -  -  -  - DIS