三峡库区坡面农林复合结构对土壤养分分布的影响

Impact of Agroforestry Structure of Slopeland on Distribution of Soil Nutrient in Three Gorges Reservoir Area

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

The impact of agroforestry structure on distribution of soil nutrient was studied by the way of surveying 5 kinds of typical agroforestry structure, such as slope cultivated land economical forest forest, forest economical forest slope cultivated land, economical forest slope cultivated land forest, forest slope cultivated land economical forest, forest economical forest terraced land, that had managed 15 years on slopeland towards Yangze River in the Three Gorges reservoir area. By analyzing soil nutrient total N, total P, total K, hydrolyzable N, available P and organic matter, it expounds two kinds of agroforestry structure, such as forest economical forest terraced land and economical forest slope cultivated land forest, have better retentive power of soil nutrient.