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应用生态学报 ›› 2018, Vol. 29 ›› Issue (7): 2173-2182.doi: 10.13287/j.1001-9332.201807.015

• 研究报告 • 上一篇    下一篇

植物残体去除对帽儿山温带落叶林土壤碳、氮、磷化学计量特征及其相关因子的影响

孔青, 王传宽, 王兴昌*   

  1. 东北林业大学生态研究中心, 哈尔滨 150040
  • 收稿日期:2017-11-27 出版日期:2018-07-18 发布日期:2018-07-18
  • 通讯作者: *E-mail: xcwang_cer@nefu.edu.cn
  • 作者简介:孔 青, 女, 1991年生, 硕士研究生. 主要从事森林土壤生态学研究. E-mail: kongqing720@126.com
  • 基金资助:

    本文由国家科技支撑计划项目(2011BAD37B01)、国家自然科学基金项目(41503071)和教育部长江学者和创新团队发展计划项目(IRT_15R09)资助.

Effects of detritus removal on soil carbon, nitrogen and phosphorus stoichiometry and related factors in a temperate deciduous forest in the Maoershan Mountain, China.

KONG Qing, WANG Chuan-kuan, WANG Xing-chang*   

  1. Center for Ecological Research, Northeast Forestry University, Harbin 150040, China
  • Received:2017-11-27 Online:2018-07-18 Published:2018-07-18
  • Contact: *E-mail: xcwang_cer@nefu.edu.cn
  • Supported by:

    This work was supported by the National Key Research and Development Program of China (2011BAD37B01), the National Natural Science Foundation of China (41503071), and the Program for Changjiang Scholars and Innovative Research Team of Ministry of Education (IRT_15R09).

摘要: 2007年在帽儿山温带落叶阔叶林中设置了地上凋落物去除(NL)、根系去除(NR)2个处理,9年后(2016年)测定土壤碳(C)、氮(N)、磷(P)浓度,以及土壤含水率和容重.结果表明: NL和NR处理表层(0~10 cm)土壤C浓度分别降低15.6%和10.7%,0~30 cm土层加权平均C浓度分别降低7.9%和4.6%;NL处理表层土壤N浓度降低10.2%,而NR处理表层土壤P浓度增加6.6%,两种处理均降低了表层土壤的C:P和N:P.标准主轴回归分析表明,不同处理间0~30 cm各土层C、N、P浓度的回归斜率均差异显著,土壤C浓度与土壤含水率、容重的回归截距也差异显著,这表明处理使土壤C、N、P化学计量与土壤物理性质发生了协同变化.建议今后植物残体去除处理试验考虑生态化学计量的调控作用.

Abstract: A detritus-removal experiment was conducted in a temperate deciduous broad-leaved forest in 2007 at the Maoershan Ecological Station in Northeast China, including two treatments: Litterfall removal (NL), root removal (NR). Soil water content, bulk density and the concentrations of soil C, N and P were measured in 2016. The results showed that the C concentration at the surface soil layer (0-10 cm) was reduced by 15.6% and 10.7% for the NL and NR treatments, respectively, while the weighted-mean soil C concentration in 0-30 cm depth was reduced by 7.9% and 4.6%, respectively. The N concentration of the surface layer in the NL treatment decreased by 10.2%, whereas the surface-soil P concentration in the NR treatment increased by 6.6%, resulting in reduced C:P and N:P for both treatments. The standardized major axis regressions showed that the regression slopes between the C, N and P at each layer of 0-30 cm soil depth differed significantly among the treatments. The intercepts of the regressions between soil C concentration and bulk density or soil water content had significant differences among the treatments. The results suggested that detritus-removal caused a coordinated variation in soil C, N and P stoichiometry and physical properties. Therefore, we recommend taking the effect on soil ecological stoichiometry into account in future detritus-removal experiments.