贵州省栎类土壤发生层特征及对土壤有机碳密度的影响

发布时间：2018-07-20 16:34

【摘要】：采用野外实地调查和室内实验分析相结合的方法,以贵州栎类林地为对象,研究分析栎类林地土壤发生层特征和土壤有机碳密度特征以及发生层对有机碳密度的影响。结果表明:1)随着海拔不断上升,贵州省内栎类林地土壤发生层分布特征显著,且土壤发生层受外界气候影响显著性不断增加。2)随着土层深度增加,遵义和铜仁有机碳含量呈现下降趋势,土壤容重呈现不断上升趋势,且遵义有机碳密度变动幅度剧烈;黔南和黔西南有机碳密度变化趋势复杂,土壤容重变化呈现上升趋势。3)随着海拔上升,有机碳密度整体呈现上升趋势,其中黔西南样地海拔最低,土壤有机碳密度含量最低;遵义样地海拔最高,且土壤有机碳密度最高。4)Pearson指数和显著性指数研究表明,栎类林地有机碳密度与土壤发生层呈现一定相关性,但相关性不显著。
[Abstract]:Based on field investigation and laboratory experimental analysis, the characteristics of soil organic carbon density and the effect of occurrence layer on organic carbon density of Quercus Quercus forest land in Guizhou Province were studied. The results showed that the distribution of soil layers in Quercus woodland in Guizhou Province was significant with the increase of altitude, and the distribution of soil layers was significantly increased by the influence of external climate. 2) with the increase of soil depth, the distribution of soil layers in Quercus woodland in Guizhou Province increased significantly with the increase of altitude. The content of organic carbon in Zunyi and Tongren showed a downward trend, the soil bulk density showed a rising trend, and the range of change of organic carbon density in Zunyi was sharp, while the change trend of organic carbon density in southern Guizhou and southwest Guizhou was complex. The soil bulk density showed an increasing trend with the elevation rising, the organic carbon density of the sample land in southwest Guizhou was the lowest, the soil organic carbon density was the lowest, Zunyi sample land had the highest altitude, and the soil organic carbon density was the lowest in the southwest Guizhou, and the highest in the Zunyi sample. The results of Pearson index and significant index showed that the organic carbon density of Quercus woodland was correlated with the soil layer, but the correlation was not significant.
【作者单位】：贵州省林业调查规划院;
【分类号】：S714

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