Excedentes de purines basados en el contenido de fósforo en suelo en explotaciones de vacuno de Gipuzkoa
- Ainara Artetxe
- Nagore Berano
- Oscar del Hierro
- Merino Merino, Domingo
- Miriam Pinto
- Arantza Aldezabal (coord.)
- Ana Aizpurua (coord.)
- Isabel Albizu Beitia (coord.)
- Amaya Ortiz Barredo (coord.)
- Sorkunde Mendarte Azcue (coord.)
- Roberto Ruiz (coord.)
Editorial: Sociedad Española para el Estudio de los Pastos
ISBN: 978-84-611-9642-5
Any de publicació: 2007
Congrés: Sociedad Española para el Estudio de los Pastos. Reunión Científica (46. 2007. Vitoria-Gasteiz)
Tipus: Aportació congrés
Resum
The intensification of the livestock farms and the division between livestock and agricultureactivities have created environmental impacts, such as the increase of N and P concentrations inwaters. In pastures of the province of Gipuzkoa different potential risk to discharge N to watercourses were theoretically estimated and 407 farms were identified as representing the majorrisk of these losses of N (Del Hierro et al., 2007). In this study, 105 dairy farms of them wereselected and soil organic matter, total N and P contents were determined in the pastures (2060ha) managed by these farms. The most of the area analyzed presented high contents of P in soil(more than 10 % of organic matter in 41 % of the area; more than 0.49 % of total N in 42 % ofthe area; more than 50 ppm of P in 43 % of the area) and, assuming a fertilization based onpasture P requirements, a surplus of 300000 m3 of slurry was estimated in the 105 farms. Thetheoretically estimated risks to discharge N to water courses (Del Hierro et al., 2007) were notwell correlated, field by field, with the organic matter, total N and P contents determined in soil,but 104 dairy farms presented problems in the management of P as well.