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以位于黄土高原典型沟壑区的砖窑沟流域为研究区,通过对流域内土壤分层取样分析,运用地统计学方法探讨了流域土壤总碳的空间分布特征,并在运用Kriging插值法生成流域土壤总碳含量空间分布图的基础上,通过构建土壤碳储量估算模型,估算出流域土壤总碳储量。结果表明,砖窑沟流域土壤总碳含量总体上随着深度增加而减少,同一深度层内土壤总碳含量沿梁峁顶部→梁峁坡→沟坝地依次减少;流域内0—100 cm深度内土壤总碳储量占0—200 cm深度内土壤总碳储量的51.8%。100—200 cm深度的土壤碳储量在0—200 cm深总碳储量中仍占较大比重。因此,在研究黄土高原土壤碳储量时,100 cm深度以下的土壤碳储量不容忽视。
Based on the analysis of stratified soil sampling in the basin, the spatial distribution of soil total carbon in the watershed was studied by using geostatistics method. The Kriging interpolation method was used to generate the soil of the basin. Based on the spatial distribution of total carbon content, the soil carbon storage estimation was estimated by constructing soil carbon storage estimation model. The results showed that the total soil carbon content in the whole area decreased along with the increase of depth, and the total soil carbon content in the same depth layer decreased along the top of beam 峁 → 峁 峁 slope → ditch dam. Total soil carbon storage accounted for 51.8% of the total soil carbon storage in the depth of 0-200 cm. The soil carbon storage depth of 100-200 cm still occupies a larger proportion of the total carbon storage depth of 0-200 cm. Therefore, when studying the soil carbon storage in the Loess Plateau, the soil carbon storage below 100 cm can not be neglected.