Grassland productivity of the Sierra de Huelva agrarian region for the information of its Forest Resources Management Plan.

In this thesis were collecting data about pastures in an agroforestry system of about 300,000 ha, located in the South-West of Spain in the province of Huelva, Andalusia, for the information of the Forest District Management Plan. Extensive livestock farming is critical to the preservation and enhancement of ecosystem biodiversity, preventing land abandonment and reducing the wildfire risk. For a correct management of the pasture is important to regulate the livestock stocking rate in accordance with the carrying capacity of the study area. In this research, the regional data of pasture and livestock were processed in the Access database and mapped in ArcGIS. It was calculated the grassland production to determine the stocking rate, from which was obtained the relative stocking density of the study area. Moreover, it was analyzed the nutritional contribution in energy (UFL) and proteins (MND) of the grassland production. The results show that the majority of the study area is under a low pressure by the livestock, that suggest to increase the number of animals in the area to maintain a correct balance of the ecosystem. In addition, the nutritional contribution in UFL and MND of the grassland production meet and exceed the nutritional requirements of the livestock, assuring their maintenance.