辽东山区三种典型林型土壤有机碳及其组分含量  

Contents of soil organic carbon and components in three types of forests in the mountain area of Eastern Liaoning

作　　者：殷有[1,2] 刘源跃 井艳丽 魏亚伟 安云全[3] 阎品初 周永斌[1,2] YIN You;LIU Yuan-yue;JING Yan-li;WEI Ya-wei;AN Yun-quan;YAN Pin-chu;ZHOU Yong-bin(College of Forestry, Shenyang Agricultural University, Shenyang 110866, China;Research Station of Liaohe-River Plain Forest Ecosystem, Chinese Forest Ecosystem Research Network, Changtu 112518, Liaoning , China;Experimental Forest Farm in Liaoning Province, Fushun 113311, Liaoning , China）.)

机构地区：[1]沈阳农业大学林学院,沈阳110866 [2]辽河平原森林生态站,辽宁昌图112518 [3]辽宁省实验林场,辽宁抚顺113311

出　　处：《生态学杂志》2018年第7期2100-2106,共7页Chinese Journal of Ecology

基　　金：国家科技支撑计划子课题(2015BAD07B03-01)资助

摘　　要：分析森林土壤有机碳及其组分含量特征是研究森林生态系统碳循环的基础。本研究以辽东山区典型的天然次生林(阔叶混交林)、落叶松人工纯林和落叶松-水曲柳人工混交林为对象,通过对其不同土层深度(0~10、10~20和20~30 cm)土壤进行样品采集和分析,研究不同林型土壤有机碳(TOC)及其活性有机碳组分的变化特征。结果表明:3种林型土壤有机碳和活性有机碳均随土层深度的增加逐渐降低;3种林型土壤有机碳和活性有机碳含量均是天然次生林>落叶松-水曲柳人工混交林>落叶松人工纯林;其中,表层(0~10cm)土壤有机碳含量分别为61.52、49.22和41.16 g·kg^(-1),活性有机碳以颗粒有机碳(POC)含量最多,分别为20.18、15.84和12.92 g·kg^(-1),轻组有机碳(LFOC)和微生物生物量碳(MBC)次之,分别为13.51、10.04、8.24 g·kg^(-1)和9.06、6.13、5.11 g·kg^(-1),易氧化有机碳(EOC)含量最少,仅为3.54、2.78、2.26 g·kg^(-1);统计分析表明,土壤有机碳与LFOC、POC、EOC和MBC均存在极显著正相关关系(P<0.01)。Soil organic carbon and its components play an important role in carbon cycling of forest ecosystems. In this study,we selected three typical forest types of Eastern Liaoning,including natural secondary forest（ broad-leaved mixed forest,SF）,pure larch plantation forest（ LF）,and larch and Manchurian ash mixed plantation forest（ MF）,and collected soil samples of different depths（ 0-10,10-20 and 20-30 cm） to analyze the variation of soil organic carbon（ TOC） and its active carbon components. The contents of TOC and its active organic carbon in the three forest types all decreased with the increases of soil depth. Among the three forest types,the contents of TOC and its active organic carbon decreased in the sequence of the natural secondary forest mixed plantation forest pure plantation forest. The TOC contents in the surface（ 0-10 cm） were 61. 52,49. 22 and 41. 16 g · kg^-1,respectively. For active organic carbon,the contents of particulate organic carbon（ POC） were the highest being 20.18,15.84 and 12.92 g · kg^-1,followed by light fraction organic carbon（ LFOC） and microbial biomass carbon（ MBC）,with the contents being 13. 51,10. 04,8. 24 g · kg^-1 and 9. 06,6. 13,5. 11 g·kg^-1 respectively. The contents of easily oxidized organic carbon（ EOC） were the lowest,being 3.54,2. 78,2. 26 g · kg^-1 in the natural secondary forest,mixed plantation forest,and pure plantation forest,respectively. There were significantly positive relationships between TOC and LFOC,POC,EOC and MBC across the three types of forests（ P〈0.01）.

关 键 词：人工林 天然次生林 土壤有机碳 活性有机碳 

分 类 号：S714.2[农业科学—林学]