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对秦岭北坡浅山区刺槐、油松、侧柏人工林根系生物量、土壤有机碳含量以及土壤氮素进行了测定分析.结果表明,3种人工林之间的根系生物量存在差异,变异系数达到27.75%;土壤有机碳含量差异不明显,变异系数只有3.36%;在土壤剖面上,3种人工林根系生物量的垂直分布有明显差异,但土壤有机碳含量的层次变化基本一致,土壤有机碳主要集中在0~10 cm土层中,其含量超过0~60 cm土层总量的40%;3种人工林土壤全氮与土壤有机碳含量之间都呈显著的线性正相关.
The rhizosphere biomass, soil organic carbon content and soil nitrogen of Robinia pseudoacacia, Pinus tabulaeformis and Platycladus orientalis plantation forest in the northern slope of Qinling Mountains were measured and analyzed.The results showed that there were differences in root biomass between the three plantations, and the coefficient of variation Reaching 27.75%. The difference of soil organic carbon content was not obvious, and the coefficient of variation was only 3.36%. In the soil profile, the vertical distribution of root biomass of three kinds of plantations was significantly different, but the level of soil organic carbon was basically the same, Carbon is mainly concentrated in 0 ~ 10 cm soil layer, which is more than 40% of the total soil layer in 0 ~ 60 cm soil layer. There is a significant linear positive correlation between soil total nitrogen and soil organic carbon content in the three kinds of plantations.