Fecha/hora: 04/06/2024 12:57:34

Biblioteca(s): 	INIA La Estanzuela; INIA Las Brujas.	
Fecha corriente: 	05/11/2014	
Fecha de la última actualización: 	06/02/2020	
Autoria: 	GARCIA, J.; PIÑEIRO, G.; ARANA, S.; SANTIÑAQUE, F.H.	
Afiliación: 	JAIME ANTONIO GARCIA RADICH, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay; G. PIÑEIRO, IFEVA/Cátedra de Ecología, Facultad de Agronomía, UBA/CONICET, Buenos Aires, Argentina; S. ARANA, Facultad de Agronomía, EEMAC, Paysandú, Uruguay; F.H. SANTIÑAQUE, Facultad de Agronomía, EEMAC, Paysandú, Uruguay.	
Título: 	Moisture deficit and defoliation effects on white clover yield and demography.	
Año de publicación: 	2010	
Fuente/Imprenta: 	Crop Science, 2010, v. 50, no.5, p. 2009-2020.	
ISSN: 	0011-183X	
DOI: 	10.2135/cropsci2009.10.0614	
Idioma: 	Inglés	
Notas: 	Article history: Published online 16 June 2010. / Published September, 2010.	
Contenido: 	ABSTRACT.

Moisture stress and high temperatures during the summer are major factors limiting white clover (Trifolium repens L.) productivity in Uruguay. Our objective was to determine the influence of irrigation and defoliation on the growth of white clover. Two white clover cultivars were sown with tall fescue [Schedonorus arundinaceus (Schreb.) Dumort = Lolium arundinaceum (Schreb.) Darbysh.] and subjected to three defoliation regimes with and without low volume irrigations during the summer. Dry matter (DM) yield, botanical composition, number of stolons, and volunteer seedlings were recorded for 3 yr. Irrigation was the main factor affecting clover growth. Clover yields under irrigation were 5.0, 7.4, and 6.9 Mg DM ha-1 in the first, second, and third year compared with 3.0, 5.1, and 1.6 Mg DM ha-1 for the same years in the nonirrigated swards. Defoliation frequency did not affect pasture yields in the nonirrigated swards but the more frequent defoliation produced higher yields under irrigation after the second year. Deferring defoliation during summer did not improve clover yield or persistence. Stolons increased during autumn and winter and decreased in spring and summer. White clover declined after the second summer in the nonirrigated swards while irrigation maintained good clover stand and yield. Profuse seedlings emergences were observed but only 1% survived, suggesting that they were not a reliable mechanism for persistence. Successful reseeding occurred only at the end of the experiment after a severe drought followed by a long wet season. 
© Crop Science Society of America.	
Palabras-Clave: 	DEFOLIACIÓN; TRIFOLIUM REPENS.	
Thesagro: 	ESTRÉS HIDRICO; MATERIA SECA; PASTURAS; TREBOL BLANCO; URUGUAY.	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (100227-1) - PXI - AP - DD - PP/CROP SCIENCE/2010 -  -  - DIS