Impacto de los forrajes conservados sobre los sistemas de cria vacuna

Abstract

In grazing systems, seasonal and inter-annual forage deficit and surplus management throughout the use of forage conservation has an important impact on pasture management and utilization, and consequently on animal performance and livestock system. This paper reports on the yield and quality of different preserved forage sources like silage or hay. Are also discussed the expected animal response with regards to harvest time and storage system (hay vs. silage). Thereby, special emphasis is given to the critical points that guarantee achieving high quality of conserved forages and the utilization of hay or silage as supplement under grazing, as well as for growing and finishing diets in feed yard systems. Finally, the paper highlights the normal nutritional deficiencies in conserved forage and discusses possible correction strategies. Even though it is well known that forage conservation - silage and hay - is a powerful tool for the intensification of livestock production systems, there are key aspects to be considered that guarantee a food reserve of high quality and take advantage of the reserves in the entire system, such as the forage production, harvest time, conservation method and utilization.