公别拉河流域主要森林类型的土壤肥力与涵养水源功能

对公别拉河流域5种主要森林类型的土壤有机质、全氮、水解氮、有效磷、活性酸(pH)、有效钾、容重、持水状况和孔隙状况进行了分析,并用主成分分析方法对土壤肥力状况进行了综合评价,结果表明:不同森林类型对土壤理化性质影响较大,天然阔叶混交林>天然针阔混交林>天然白桦林>落叶松人工林>樟子松人工林;不同森林类型枯落物持水量由高到低依次为:天然针阔混交林>天然白桦林>落叶松人工林>樟子松人工林>天然阔叶混交林;林地最大蓄水量和有效蓄水量由高到低依次为:天然针阔混交林>天然白桦林>落叶松人工林>天然阔叶混交林>樟子松人工林。

Soil Fertility and Water Conservation Function of Main Forest Types in Gongbiela River Watershed

The soil fertility of 5 main forest types in Gongbiela river watershed was evaluated in terms of organic matter, total nitrogen, hydrolysable nitrogen, available phosphorus, active acid, available kalium, volume weight, water-holding capacity and total porosity by the method of principal component analysis. Results showed that there are big differences in physical and chemical properties of soil for different forest types, and they are in the order of natural mixed deciduous forest, natural mixed coniferous-deciduous forest, natural Betula platyphylla forest, Larix gmelini Linn. plantation, Pinus sylvestris var. mongolica plantation from high to low. While in the holding water capacity of litter, the order is natural mixed coniferous-deciduous forest, natural Betula platyphylla forest, Larix gmelini plantation, Pinus sylvestris var. mongolica plantation, natural mixed deciduous forest. Natural mixed coniferous-deciduous forest has the maximum holding water capacity and available holding water capacity, followed by natural Betula platyphylla forest, Larix gmelini plantation, natural mixed deciduous forest, Pinus sylvestris var. mongolica plantation in a decreasing sequence.