辽东山区三种典型林型土壤有机碳及其组分含量

生态学杂志

辽东山区三种典型林型土壤有机碳及其组分含量

殷有^1,2*,刘源跃¹,井艳丽¹,魏亚伟^1,2,安云全³,阎品初¹,周永斌^1,2

（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）

出版日期:2018-07-10 发布日期:2018-07-10

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

YIN You^1,2*, LIU Yuan-yue¹, JING Yan-li¹, WEI Ya-wei^1,2, AN Yun-quan³, YAN Pin-chu¹, ZHOU Yong-bin^1,2

(¹College of Forestry, Shenyang Agricultural University, Shenyang 110866, China; ²Research Station of LiaoheRiver Plain Forest Ecosystem, Chinese Forest Ecosystem Research Network, Changtu 112518, Liaoning, China; ³Experimental Forest Farm in Liaoning Province, Fushun 113311, Liaoning, China).

Online:2018-07-10 Published:2018-07-10

摘要/Abstract

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（0~10 cm）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）。

关键词: 坡度, 坡向, 叶片功能性状, 山杏, 黄土高原

Abstract: 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).

Key words: slope aspect, Loess Plateau, leaf functional trait, slope gradient, apricot

殷有,刘源跃,井艳丽,魏亚伟,安云全,阎品初,周永斌. 辽东山区三种典型林型土壤有机碳及其组分含量[J]. 生态学杂志.

YIN You, LIU Yuan-yue, JING Yan-li, WEI Ya-wei, AN Yun-quan, YAN Pin-chu, ZHOU Yong-bin. Contents of soil organic carbon and components in three types of forests in the mountain area of Eastern Liaoning.[J]. cje.

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