Sunday, 6 October 2002: 1:30 PM
P, B4, 34.5 - Silvopasture in the U.S. - bringing forests and pastures together
Forestry and livestock grazing are common competing uses for non-irrigated lands around the world. Forest grazing is a traditional practice in most of North America. Livestock grazes approximately 25 percent of all US forestland. Agroforests are planned, managed agroecosystems. Agroforestry differs from traditional forestry and agriculture by its focus on the interactions among components rather than on the individual components themselves. Success of agroforestry is, therefore, largely determined by the extent to which individual forest and agricultural components can be integrated to help rather than hinder each other. Each component is judged by its capacity to produce desired products, and its ability to assist other components. For instance, trees can produce saleable wood fiber and fruits or nuts, while increasing pasture and livestock production by breaking the wind and providing shade. Pasture plants provide forage for livestock and serve as a living mulch to help suppress weeds and to reduce soil erosion. Livestock provide income, consume weeds, and are a major tool by which grass/legume, and tree/forage competition is controlled. Just as a well-designed system is better than the sum of its individual parts, the combined tree plus forage productivity of silvopastures may substantially exceed that of pastures or forests grown alone. For example, one acre of grass-legume/Douglas-fir silvopasture in Western Oregon has been observed to produce as much forage and timber as 1.6 acres of similar forest and pasture grown alone. This panel will discuss the potential for the application of silvopasture systems in different regions of the country.
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