长白山白桦林不同演替阶段土壤有机碳组分的变化  

Change of soil organic carbon fractions at different successional stages of Betula platyphylla forest in Changbai Mountains

作　　者：张雪[1,2] 韩士杰[1] 王树起[1] 谷越[1,2] 岳琳艳 冯月[1] 耿世聪[1,2] 陈志杰[1,2] 

机构地区：[1]森林与土壤生态国家重点实验室,中国科学院沈阳应用生态研究所,沈阳110016 [2]中国科学院大学,北京100049

出　　处：《生态学杂志》2016年第2期282-289,共8页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31470522,41330530)资助

摘　　要：为了解长白山天然针阔混交林群落恢复演替土壤碳储量的变化,采用空间代替时间的方法,选取白桦幼龄林、白桦中龄林、白桦成熟林、阔叶红松成熟林和阔叶红松过熟林5个不同演替序列,研究其土壤总有机碳（SOC）、易氧化有机碳（ROC）、微生物生物量碳（MBC）及颗粒有机碳（POC）含量。结果表明：随着白桦林从早期到晚期的演替,SOC、MBC、ROC、POC以及土壤全氮、全磷和碳氮比（C/N）均呈现先逐渐增加后保持稳定的规律。随着土层深度的增加,SOC、MBC、ROC和POC含量均显著降低（P〈0.05）,5个演替序列内ROC/SOC和POC/SOC的变化范围分别为12.91%~47.95%和14.21%~69.46%。相关分析表明：MBC、ROC和POC含量与土壤总有机碳（SOC）含量呈极显著正相关（P〈0.01）,SOC、MBC、ROC和POC含量与全氮、全磷及碳氮比呈极显著正相关（P〈0.01）。研究结果为了解白桦林在演替过程中土壤有机碳的稳定性变化和固碳潜力提供数据支持。In order to understand the change of soil carbon storage during natural restoration suc- cession of coniferous-broadleaved mixed forest communities in Changbai Mountains, five succes- sional stages, including birch young forest, birch middle-aged forest, birch mature forest, mature broadleaved Korean pine forest and old broadleaved Korean pine forest, were chosen using the temporal-spatial substitution method, to study the soil organic carbon （SOC）, readily-oxidized organic carbon （ROC）, microbial biomass carbon （MBC） and particulate organic carbon （POC） contents. The results showed that SOC, MBC, ROC, POC and soil total nitrogen, total phosphorus and carbon to nitrogen ratio （C/N） all increased firstly and then remained stable from early to late succession. The contents of SOC, MBC, ROC and POC were significantly decreased （P〈0.05） with the increasing soil layer depth. ROC/SOC and POC/SOC ranged between 12.91%-47.95% and 14.21%-69.46% in the five successional stages, respectively. The correlation analysis showed a significant positive correlation （P〈0.01） between MBC, ROC, POC and SOC, and a significant positive correlation （P〈0.01） between SOC, MBC, ROC, POC and total nitrogen, total phosphorus, carbon to nitrogen ratio. Our results provide data support for clarifying soil organic carbon stability and carbon sequestration potential during the succession of the birch forest.

关 键 词：白桦林演替 微生物生物量碳 易氧化有机碳 颗粒有机碳 

分 类 号：S714.2[农业科学—林学]