基于生态化学计量学的秦岭林地养分特征初探
发布时间：2019-06-22 11:50
【摘要】：以秦岭典型林地土壤为对象,分析了夏、秋两季锐齿栎、油松、华山松、云杉4种典型林分下林地不同土层土壤的生态化学计量学特征。结果表明:5个林地腐殖质层(O层)、表层(A层)土壤有机碳含量分别在76.23~260.70,26.60~44.81g/kg之间;全氮含量在4.19~8.76,1.46~3.29g/kg之间;全磷含量分别在0.38~0.61,0.33~0.63g/kg之间。5个林地O层、A层C/N范围分别为16.48~29.76,12.31~19.39;C/P范围分别为144.93~465.52,44.63~107.42;N/P范围分别为7.97~18.37,2.58~6.23。土壤有机碳和全氮及C/N,C/P,N/P均表现为O层大于A层,且O层碳氮含量动态变化较大。阔叶林地土层间差异小于针叶林地。华山松林地土壤碳氮磷含量及C/N、C/P均高于其他林地。土壤C/P和N/P的空间变异性较大,C/N相对稳定。土壤碳氮磷含量及化学计量比值大多表现为夏季高于秋季。
[Abstract]:Taking the soil of typical forest land in Qinling Mountains as the object, the ecological chemometrics characteristics of soil in different soil layers of forest land under four typical stands of Quercus acutissima, Pinus tabulaeformis, Pinus tabulaeformis and spruce in summer and autumn were analyzed. The results showed that the contents of soil organic carbon, total nitrogen, total phosphorus and total phosphorus in the humus layer (O layer) and surface layer (A layer) were 76.23 260.70, 26.60 4.81 g / kg, 4.19 8.76 g / kg, 1.46 3.29 g / kg, 0.38% 0.61 g / kg, 0.33 0.63 g / kg, 16.48% 29.76 g / kg and 12.31 19.39 g / kg, respectively. the content of total phosphorus was 0.38 0.61 g / kg, 0.33 0.63 g / kg, 16.48% 29.76 g / kg, 12.31% 19.39 g / kg, 16.48 g / kg and 12.31 g / kg, respectively, and the total phosphorus content was 0.38% 0.61 g / kg and 0.33 g / kg, respectively. The C and P ranges were 144.93 465.52, 44.63 107.42 N and 7.97 18.37 and 2.58 6.23, respectively. Soil organic carbon, total nitrogen and C 鈮，
本文编号：2504552
[Abstract]:Taking the soil of typical forest land in Qinling Mountains as the object, the ecological chemometrics characteristics of soil in different soil layers of forest land under four typical stands of Quercus acutissima, Pinus tabulaeformis, Pinus tabulaeformis and spruce in summer and autumn were analyzed. The results showed that the contents of soil organic carbon, total nitrogen, total phosphorus and total phosphorus in the humus layer (O layer) and surface layer (A layer) were 76.23 260.70, 26.60 4.81 g / kg, 4.19 8.76 g / kg, 1.46 3.29 g / kg, 0.38% 0.61 g / kg, 0.33 0.63 g / kg, 16.48% 29.76 g / kg and 12.31 19.39 g / kg, respectively. the content of total phosphorus was 0.38 0.61 g / kg, 0.33 0.63 g / kg, 16.48% 29.76 g / kg, 12.31% 19.39 g / kg, 16.48 g / kg and 12.31 g / kg, respectively, and the total phosphorus content was 0.38% 0.61 g / kg and 0.33 g / kg, respectively. The C and P ranges were 144.93 465.52, 44.63 107.42 N and 7.97 18.37 and 2.58 6.23, respectively. Soil organic carbon, total nitrogen and C 鈮，
本文编号：2504552
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