Pasture production under different tree species and densities in an Atlantic silvopastoral system

摘要: We studied the effect of six tree species planted at different densities on pasture production seven years after establishment. Annual and seasonal was every months, over three years. Pasture lower under conifer trees (Pseudotsuga menziesii (Mirb.) Franco, Pinus pinaster Aiton, radiata D. Don) than broadleaved (Betula alba L., Quercus rubra L. Castanea sativa Mill.). Pseudotsuga decreased progressively starting from 952 ha−1, while decline in herbage began to occur 427 ha−1. Tree density detected 2,000 ha−1 for all deciduous studied. This more important first months year (June sampling), June December less affected by density. The became noticeable time, with last sampling showing inverse relationship between most clearly. Seven establishment, quite consistent 190 556 declined remarkably 2,500 study also indicated that sixth growing season, annual is inversely correlated leaf area index.