【摘要】：以冀北遼河源自然保護(hù)區(qū)油松林火燒跡地為研究區(qū),研究不同土壤深度(0~5cm、5~10cm、10~20cm)以及不同火強(qiáng)度(未火燒、輕度、中度、重度和極度)干擾下油松林土壤化學(xué)性質(zhì),對火燒跡地土壤的改良和油松林的恢復(fù)更新具有實(shí)踐意義.研究結(jié)果表明:火燒1年后,土壤pH有所升高;土壤有機(jī)碳、全氮、全鉀質(zhì)量分?jǐn)?shù)除在極度火強(qiáng)度下,其他火強(qiáng)度下都有所升高;磷和有效磷在過火土壤中的質(zhì)量分?jǐn)?shù)亦增加;土壤pH、有機(jī)碳、全氮、全鉀、全磷和有效磷質(zhì)量分?jǐn)?shù)在土層垂直分布上的狀況為表層土大于深層土.因此,火燒對土壤表層產(chǎn)生較大影響且強(qiáng)度合理的火干擾可以有效提高土壤肥力.
[Abstract]:The soil chemical properties of Pinus tabulaeformis forest in Liaohe Source Nature Reserve of North Hebei Province were studied under different soil depths (0 ~ 5 cm ~ (5) ~ 5 ~ (10) cm ~ (10) ~ (10) cm ~ (10) ~ (20 cm) and different fire intensity (not burned, mild, moderate, severe and extreme). It has practical significance for soil improvement and restoration of Pinus tabulaeformis forest. The results showed that the pH of soil increased a year after burning, the mass fraction of organic carbon, total nitrogen, total potassium increased under the extreme fire intensity, and the mass fraction of phosphorus and available phosphorus also increased in the overheated soil. The vertical distribution of soil pH, organic carbon, total nitrogen, total potassium, total phosphorus and available phosphorus in the soil layer shows that the surface soil is larger than the deep soil. Therefore, fire burning has a great influence on the soil surface layer and the fire disturbance with reasonable intensity can effectively improve soil fertility.
【作者單位】： 北京林業(yè)大學(xué)林學(xué)院;
【基金】：國家林業(yè)科學(xué)技術(shù)推廣項(xiàng)目 云南省森林火災(zāi)中長期多時空尺度預(yù)測技術(shù)與示范(2015-04)
【分類號】：S714.2;S762.1

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