TY - CONF ID - orgprints3773 UR - http://orgprints.org/3773/ A1 - Fürmetz, A. A1 - Keppler, C. A1 - Knierim, U. A1 - Deerberg, F. A1 - Heß, J. Y1 - 2005/// N2 - The use of the free-range area by laying hens housed in a mobile system and the resulting condition of the range were investigated. The free-range was used very intensively. On an average of nine complete observation days 35 % of the birds (23 ? 44 % means per day) were outside the house. The maximum of animals in the free range was 77 %. 75 % (60 ? 95 %) of the hens outside the house stayed in an area of 20 m around the house. This led to deteriorated conditions of the range in these areas. By moving the mobile house regularly (after 2 weeks in summer and 6 weeks in winter) a destruction of the vegetation could be avoided, while after not moving the house for three months in winter a complementary seeding became necessary. We conclude that the use of mobile systems for poultry in conjunction with a regular change of position and sufficient area per animal can avoid destruction of the vegetation despite an intensive use of the free-range all year round. PB - kassel university press GmbH, Kassel KW - Auslaufnutzung KW - Geflügel KW - Haltung ED - Heß, J ED - Rahmann, G TI - Legehennen in einem mobilen Stallsystem - Auslaufnutzung und Flächenzustand - AV - public ER -