大兴安岭山地樟子松天然林不同坡位土壤养分特征及相关性研究

以大兴安岭地区典型山地樟子松天然林为材料，研究了不同坡位土壤养分特征及其相关性，研究得出：坡位对土壤速效养分影响较大。樟子松天然林0～20cm土层土壤有机质含量与土壤水解氮含量均有：坡上〉坡下〉坡中，二者含量平均值分别为1．24％和573．45mg／kg；土壤全氮含量表现为：坡下〉坡上〉坡中，其含量平均值为2．504g／kg。土壤全磷和土壤速效磷含量变化规律为：坡上〉坡中〉坡下，其土壤全磷含量分别为：2．469、2．180和2．160g／kg；土壤速效磷含量分别为607．80、509．76和443．84mg／kg。土壤全钾含量变化为：坡下〉坡中〉坡上，平均值为50．41g／kg；土壤速效钾含量变化为：坡上〉坡中〉坡下，其值分别为：500．16、476．00和443．15mg／kg，平均值为473．10mg／kg。相关分析结果表明，土壤有机质与其他养分元素含量呈正相关，除与土壤全钾和速效钾相关性较差，其余相关性均较好。在不同坡位上，土壤全量养分间的差异不显著，速效养分间差异显著。

Research on Soil Nutrient Characteristic and Correlation in Different Slope Position of Scotch Pine Forest in Da Hinggan Mountains

Soil nutrient characteristic and the correlation in different slope position of Scotch Pine Forest was studied in Da Hinggan Mountains, the results showed that, the slope has a great influence in Soil phosphorus nutrients. Soil organic matter, soil hydrolysable nitrogen of 0 -20 cm soil layer was as follows ： upslope 〉 lower slope 〉 middle slope. The average of soil organic matter, soil hydrolysable nitrogen was 1.24%, 573.45 mg/kg, respectively. Soil total phosphorus and soil available phosphorus were as follows： upslope 〉 middle slope 〉 lower slope. The soil total phosphorus content was 2.469, 2. 180 and 2. 160 g/kg, respectively. The soil available phosphorus content of upslope was 607.80 mg/kg, with middle slope as 509.76 mg/kg, upslope as 443.84 mg/kg. Soil total potassium content was in line with ： lower slope 〉 middle slope 〉 upslope, with the average of the content as 50.41 g/kg. Soil available potassium was in line with： upslope 〉 middle slope 〉 lower slope, with upslope as 500.16 mg/kg, the middle slope as 476.00 mg/kg, lower slope as 443.15 mg/kg. The average of soil available potassium was 473.10 mg/kg. Related analysis shows that soil organic matter was positively associated with the other nutrients. Besides the correlation between soil organic with soil total potassium and soil available potassium was poor, the correlation of the rest nutrients was well. In different slope, soil total nutrients content was not significant, but soil available nutrients content was significant.