Ecological Interactions and Productivity in Agroforestry Systems

摘要: Ecological Interactions (hereafter, interactions) between the components of an agroforestry system occur when one component influences performance other components, and that whole system. in can be positive, neutral or negative. A positive interaction is complementarity woody herbaceous resource acquisition. Competition for water, nutrients light example negative interactions. Allelopathy, damage caused by animals pests, disease transmission are Neutral interactions systems different exploit same pool resources, increases capture species result a proportional decrease associated species. Trees contribute to productivity through fertilization, soil conservation. Tree contribution fertilization symbiotic fixation nitrogen, root turnover, nutrient cycling, their involvement formation humus layer. Maintenance physical properties accomplished erosion control stabilization roots.