帽儿山温带森林演替初期土壤碳、氮、磷计量特征的变化

发布时间：2018-04-12 11:59

本文选题：土壤 + 植被演替　；参考：《应用生态学报》2016年10期

【摘要】：2004年在帽儿山森林生态站设置土壤置换试验,将0~30 cm农田土置换成邻近天然次生林淋溶层土(A处理)、淀积层土(B处理)和母质层土(风化砂,C处理),分别模拟森林皆伐次生演替、无种子库次生演替和原生演替,2014年研究温带落叶阔叶林不同演替类型在自然演替初期土壤碳、氮、磷计量特征的变化.结果表明:演替10年,A处理土壤碳、氮、磷含量无显著变化,B处理土壤碳和氮含量分别降低34.7%和38.6%,而C处理土壤碳和氮含量分别增加63.4%和198.4%.植被演替后,氮-碳异速生长关系斜率显著降低,磷-氮异速生长速率显著升高.10年演替后,仅C处理土壤C∶N减小44.5%,N∶P增加283.6%,其他处理变化不显著.土壤碳、氮、磷含量与活细根现存量、死细根现存量均存在显著相关关系,植被演替可能主要通过改变有机质输入驱动土壤碳、氮、磷含量及其计量关系.
[Abstract]:In 2004, a soil replacement experiment was conducted at the Maoershan Forest Ecological Station,The 0 ~ (30 cm) cropland soil was replaced with adjacent natural secondary forest leachate layer soil (A) treatment, deposition layer soil (B) treatment) and parent layer soil (weathered sand C treatment), respectively, to simulate forest clear cutting secondary succession, respectively.Without seed bank secondary succession and primary succession, the changes of soil carbon, nitrogen and phosphorus metering characteristics of different succession types of temperate deciduous broadleaved forest in the early stage of natural succession were studied in 2014.The results showed that there was no significant change in soil carbon, nitrogen and phosphorus contents in C treatment for 10 years, while C treatment increased soil carbon and nitrogen content by 63.4% and 198.4. the soil carbon and nitrogen contents decreased by 34.7% and 38.6%, respectively.After vegetation succession, the slope of nitrogen-carbon isokinetic growth relationship decreased significantly, and the growth rate of P-N allormal growth increased significantly. After 10 years of succession, only C treatment soil C: n decreased 44.5% and N: P increased by 283.6%, while other treatments did not change significantly.Soil carbon, nitrogen and phosphorus contents were significantly correlated with the active fine root standing stock and dead fine root standing stock. Vegetation succession may drive soil carbon, nitrogen and phosphorus contents and their metrological relationships mainly by changing the organic matter input.
【作者单位】：东北林业大学林学院;东北林业大学生态研究中心;
【基金】：大学生创新项目(201410225059) 教育部长江学者和创新团队发展计划项目(IRT_15R09)资助~~
【分类号】：S714.2

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