Fecha/hora: 18/06/2024 18:46:38

Biblioteca(s): 	INIA La Estanzuela.	
Fecha corriente: 	14/01/2022	
Fecha de la última actualización: 	23/03/2023	
Autoria: 	BANCHERO, G.; CLARIGET, J.M.; LA MANNA, A.; WATT, L.J.; MILTON, J.T.B.; FERNANDEZ, E.; ZARZA, R.; BALDI, F.; THOMAS, D.T.	
Afiliación: 	GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JUAN MANUEL CLARIGET BRIZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ALEJANDRO FRANCISCO LA MANNA ALONSO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; L. J. WATT, CSIRO Agriculture and Food, 203 Tor Street, Toowoomba, Qld 4350, Australia.; J. T. B. MILTON, Institute of Agriculture, The University of Western Australia, Crawley, WA 6009, Australia.; ENRIQUE GENARO FERNANDEZ RODRIGUEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RODRIGO TABARE ZARZA FUENTES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FERNANDO SEBASTIAN BALDI REY, Faculdade de Ciencias Agrárias e Veterinárias, Via de Acesso Castellane s/n, Jaboticabal 14884-900, São Paulo, Brasil.; D.T. THOMAS, CSIRO Agriculture and Food, Centre for Environment and Life Sciences, 147 Underwood Avenue, Floreat, WA 6014, Australia.	
Título: 	Growth of young cattle grazing high-moisture winter forages in a temperate environment was not affected by access to drinking water.	
Año de publicación: 	2022	
Fuente/Imprenta: 	Animal Production Science, 2022, Volume 62, Issue 4, p.392-400. Doi: https://doi.org/10.1071/AN21288	
ISSN: 	1836-0939	
DOI: 	10.1071/AN21288	
Idioma: 	Inglés	
Notas: 	Article history: Received: 2 June 2021/Accepted: 10 November 2021/Published: 9 December 2021 -- Correspondence author: Banchero, G.; Instituto Nacional de Investigación Agropecuaria. INIA la Estanzuela, Ruta 50 km 12, Colonia, Uruguay; email:gbanchero@inia.org.uy -- FUNDING: This project was funded by Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. --	
Contenido: 	Abstract:
Context: Early sown, annual ryegrass pastures and winter crops provide a high-quality feed for livestock and also have a high water content during autumn and early winter compared with typical temperate pastures.

Aim: We hypothesised that beef cattle grazing annual ryegrass or forage oats would not need additional access to drinking water to maintain their intake and growth.

Methods: In Experiment 1, 48 weaned, castrated male Hereford calves with liveweight 154 kg (±6.7 kg; s.d.) grazed Italian ryegrass at a daily allowance of 4.5 kg dry matter (DM)/100 kg liveweight in two treatments including with or without access to drinking water. In Experiment 2, 60 Hereford steers with liveweight 382 kg (±20.6 kg; s.d.) were offered a daily allowance of 5 kg DM/100 kg liveweight of forage oats in a 2 × 2 factorial design either with or without access to drinking water and with or without sorghum grain silage supplemented at 1% of liveweight. The experiments were analysed as a completely randomised design, with individual pasture plots as the experimental unit.

Key results: Daily growth rates of calves in the two treatments were similar (P > 0.05); however, calves with access to drinking water consumed 60% more water than did the calves without drinking water (P < 0.001). Access to drinking water had no effect (P > 0.05) on the daily growth rate of steers (P > 0.05); however, the daily growth rate of supplemented steers was 9% higher than that of the unsupplemented steers (P < 0.05). Total water intake was affected by access to drinking water (P < 0.005) but not access to supplementation (P > 0.05).

Conclusions: Both calves and steers derived no production benefits by having access to drinking water when grazing actively growing annual ryegrass pasture or forage oats. Nevertheless, livestock should be monitored closely so that appropriate interventions can be made if there are changes in the pasture availability or weather.

Implications: Grazing early sown winter forages by livestock can help circumvent the autumn?winter feed gap and these forages can be utilised more cost-effectively by not having to provide drinking water when the DM content is low.	
Palabras-Clave: 	Calves; Cereal crops; Feed efficiency; Feed gap; Pasture moisture; Pasture utilisation; Steers; Supplementation.	
Categoría del tema: 	--	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (103475-1) - PXI - AP - DD - PP/Animal Production Science, 2022. -  -  - DIS