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通过对三峡库区迎江坡面 5种已持续经营 15年以上的代表性农林复合结构类型的土壤养分状况的监测 ,研究不同农林复合结构对土壤养分分布的影响。从坡项至坡脚 ,农林复合结构类型分别为 :坡耕地 -经济林 -林地、林地 -经济林 -坡耕地、经济林 -坡耕地 -林地、林地 -坡耕地 -经济林、林地 -经济林 -梯地。测定了土壤全 N、全 P、全 K、水解 N、速效 P和有机质 ,通过分析得出 :林地 -经济林 -梯地、经济林 -坡耕地 -林地两种结构具有较好的土壤养分保持功能
Through the monitoring of the soil nutrient status of five types of agroforestry that have been in continuous operation for more than 15 years on the Yingjiang slope in the Three Gorges Reservoir Area, the effects of different agroforestry structures on soil nutrient distribution were studied. From slope to slope foot, the types of agroforestry structure are: sloping land-economic forest-woodland, woodland-economic forest-sloping land, economic forest-sloping land-woodland, woodland-sloping land-economic forest, woodland-economic forest-land. Total N, total P, whole K, hydrolyzed N, available P, and organic matter in soil were determined. The results showed that the two structures of woodland - economic forest - terrace, economic forest - sloping land -