巫溪县生态修复区植被覆盖对土壤养分及其有效性的影响

对三峡库区巫溪县生态修复区以华山松为优势树种的针阔混交林、马尾松为主的针阔混交林、杉木-马尾松为主的混交林、柏树-马尾松混交林、榛子纯林与对照地土壤的化学性质进行了对比研究。研究结果表明：有林地的土壤化学性质与对照地相比存在明显差异;土壤有机质的含量明显高于两种对照地,而且在各个林区随着林龄的增大,土壤有机质含量有增加的趋势;土壤中全N、P、K和速效养分也呈现出显著的变化。

Research on the plant cover impact on the physicochemical property of the soil in the ecological restoration area of Wuxi county

With the great special characteristic of biologic and ecology, various forest type has different effect on the different chemical property of soil. Research on the ecological restoration area in Wuxi country in the reservoir area of three gorges, which considering China Armand pine and mason pine as the dominant plant of the mixed broadleaf-conifer forest including fir-mason pine of mixed forest, cypress mason pine of mixed forest and pure filbert forest of the soil. The results show that the soil chemical properties of woodland have a remarkable difference compared with reference land, as well as the whole Nitrogen, Phosphorus, Kailua and readily available nutrient of the soil. Meanwhile, the organic content is higher than the two reference lands obviously, the soil organic content has the increased trend with the increase of the age of the forest in each forest area.