贡嘎山东坡峨眉冷杉林区土壤CO2排放
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* 中国科学院“九五”重大项目(KZ951-A1-301);特别支持项目(KZ95T-04-02);国家与中国科学院青藏高原研


CO2 EMISSIONS FROM SOILS IN ABIES FABRI FOREST REGION ON THE EAST SLOPE OF GONGGA MOUNTAIN
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    摘要:

    在植物生长季对贡嘎山东坡峨眉冷杉林区三种不同类型土壤排放CO2过程进行了连续观测,三种类型土壤CO2排放存在着显着差异。峨眉冷杉演替林采伐迹地土壤呼吸强度最高,达5.89μmol/m2sCO2,在各月份中高低依次为9月>8月>6月>7月>5月>10月>11月;峨眉冷杉林土壤呼吸强度次之,为5.76μmoL/m2sCO2,在各月份中高低依次为8月>7月>9月>6月>5月>10月>11月;峨眉冷杉演替林土壤呼吸强度最低,为3.26μmol/m2sCO2,在各月份中高低依次为5月>7月>8月>6月>9月>10月>11月。观测的各种温度指标对土壤CO2排放有明显的影响,分析表明,近地表气温对峨眉冷杉林采伐迹地和演替林土壤CO2排放影响最大,10cm和5cm深地温对峨眉冷杉林土壤CO2排放影响最大,根据观测的土壤呼吸月平均值计算得出土壤CO2排放的通量估计值,峨眉冷杉林采伐迹地土壤CO2排放为223.91kg/hm2d,峨眉冷杉林土壤排放为218.481kg/hm2d,峨眉冷杉演替林土壤CO2排放为123.76kg/hm2d.

    Abstract:

    Abies fabri forest is one of representative type of subalpine dark coniferous forest in Southwest China. The difference was obvious among CO2 emissions from soils in Abies fabri forest region on the east slope of Gongga Mountain. The soil respiration of clearcut site approached 5.89 μmol/hm2s CO2. The series of soil respiration was arranged: September>August>June>July>May>October>November. The soil respiration of Abies fabri forest approached 5.76μmol/hm2s CO2. The series of soil respiration was arranged: August>July>September>June>May>October> November. The soil respiration of succession forest approached 3.26, mol/hm2s CO2. The series of soil respiration was arranged: May>July> August>June> September>October>November. There existed a good linear correlation between soil respiration of cleareut site-succession forests and near surface-surface temperature. There existed a good linear correlation between soil respiration of Abies fabri forest and 5cm-10cm soil temperature. The soil CO2 flux of clearcut site was 223.91kg/hm2d. The soil CO2 flux of succession forest was 123.76kg/hm2d. The soil CO2 flux of Abies fabri forest was 218.48kg/hm2d.

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罗辑,杨忠,杨清伟.贡嘎山东坡峨眉冷杉林区土壤CO2排放[J].土壤学报,2000,37(3):402-409. DOI:10.11766/trxb199903290315 Luo Ji, Yang Zhong, Yang Qing-wei. CO2 EMISSIONS FROM SOILS IN ABIES FABRI FOREST REGION ON THE EAST SLOPE OF GONGGA MOUNTAIN[J]. Acta Pedologica Sinica,2000,37(3):402-409.

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  • 收稿日期:1999-03-29
  • 最后修改日期:1999-12-28
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  • 在线发布日期: 2013-02-25
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