Grazing livestock as a tool for managing natural feed resources in Sayago (Zamora, Spain)
2008
García, R.; Valdés, C.; Andrés, S.; Alvarenga, J.; Calleja, A., Universidad de León (Spain). Departamento de Producción Animal
In the region of Sayago (Zamora, NW Spain), traditional management practices based upon systematic grazing Agrostietalia order communities are declining. As a result, some areas are being overgrazed, whereas others are underused. This work tries to prove that systematic grazing management (5-6 times during the herbage growth period) acts as a regulating factor of forage resources and allows good quality forage to be obtained [crude protein (CP) equal to 150-200 g per kg DM; crude fibre (CF) equal to 210-260 g per kg DM; organic matter digestibility (OMd) equal to 64-61 per cent] without large production losses (22 per cent of DM). Moreover, herbage growth rates (41-105 kg per ha per day) of other pasture communities allow reserving areas to be harvested or grazed when feed availability falls
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