Fecha/hora: 04/06/2024 06:48:14

Biblioteca(s): 	INIA La Estanzuela.	
Fecha corriente: 	03/09/2019	
Fecha de la última actualización: 	03/09/2019	
Autoria: 	SCHENEITER, J.O.; BERTÍN, O.D.; LATTANZI, F.	
Afiliación: 	JORGE O. SCHENEITER, Estación Experimental Agropecuaria Pergamino, INTA, Ruta 32 km 4,5, 6700, Pergamino, Buenos Aires, Argentina.; OSCAR D. BERTÍN, Estación Experimental Agropecuaria Pergamino, INTA, Ruta 32 km 4,5, 6700, Pergamino, Buenos Aires, Argentina.; FERNANDO A. LATTANZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.//Lehrstuhl für Grünlandlehre, Technische Univ., München, Germany.	
Título: 	Under sressful conditions, high cattle density maintains white clover abundance.	
Año de publicación: 	2019	
Fuente/Imprenta: 	Agronomy Journal, 2019, v. 111, no. 3, p. 1198-1207, 2019.	
DOI: 	10.2134/agronj2018.03.0186	
Idioma: 	Inglés	
Notas: 	Article history: Received: Mar 19, 2018//Accepted: Nov 25, 2018//Published: March 8, 2019.	
Contenido: 	Abstract: The aim of the present study was to evaluate the abundance and dynamics of white clover (WC) (Trifolium repens L.) under cattle grazing, in a stressful environment. To this end, we performed a 5-yr experiment in Buenos Aires province, Argentina, where treatments were low and high forage offers (LFO and HFO) of a tall fescue (TF) [Lolium arundinaceum Schreb. (Darbysh.)]?WC mixture and two sites regarding the initial existence of WC in the pasture (with and without white clover, WC+ and WC?). Climatic conditions determined periods of deficiency or abundance of plant available water in the topsoil, which interacted with the grazing management, leading to either the absence or richness of WC in the pasture. Before a drought, the basal cover of WC was 31.0 and 11.2% with LFO and HFO treatments, respectively (P < 0.001); whereas, during recovery after drought, the corresponding values were 44.0 and 2.7% (P < 0.001), respectively. Re-establishment of WC at the pasture level was poorly related to the pre-drought spatial distribution. At the beginning of the experiment, the TF tiller density was greater in WC? sites; whereas, at the end of the experiment, the opposite was observed. The N derived from biological fixation was 85.5% and differences among treatments were of small magnitude. We concluded that, at the pasture level, the abundance of WC in an environment with hot and often dry summers is favored when the competition by TF is controlled and the availability of water in the soil is not limiting.	
Palabras-Clave: 	ABUNDANCIA TREBOL BLANCO; DINÁMICA DE TRÉBOL BLANCO; HIGH FORAGE OFER (HFO); LOLIUM ARUNDINACEUM SCHREB; TALL FESCUE; WHITE CLOVER.	
Thesagro: 	FESTUCA; LEGUMINOSAS; MANEJO DE PASTOREO; PASTURAS; TREBOL BLANCO.	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (102976-1) - PXI - AP - DD - PP/AJ/2019 -  -  - DIS