| 大兴安岭不同演替阶段土壤呼吸及其组分的动态 |
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| 引用本文： | 孙赫奕,闫国永,邢亚娟,王庆贵.大兴安岭不同演替阶段土壤呼吸及其组分的动态[J].黑龙江大学工程学报,2021,12(3):247-256. |
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| 作者姓名： | 孙赫奕 闫国永 邢亚娟 王庆贵 |
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| 作者单位： | 黑龙江大学现代农业与生态环境学院,哈尔滨150080;曲阜师范大学生命科学学院,山东曲阜273165;黑龙江大学现代农业与生态环境学院,哈尔滨150080;曲阜师范大学生命科学学院,山东曲阜273165 |
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| 摘 要： | 土壤呼吸及其组分随森林演替的变化对于长期碳循环模型及其地下碳储量至关重要.为了研究土壤呼吸随森林演替的变化及其影响机制,在2019年大兴安岭地区选取草地(GL)、白桦林(BF)、白桦与落叶松混交林(MF)、落叶松林(LF)4个不同演替阶段并对其进行研究.采用壕沟法测定自养(RA)和异养(RH)呼吸.结果 表明,GL、BF、MF和LF的土壤呼吸(RS)分别为3.11,5.68,5.54和4.69 μmol·m-2·s-1,RH分别为2.37,4.56,4.31和3.50 μmol·m-2·s-1,RA分别为0.74,1.12,1.23和1.19 μmol·m-2·s-1,GL、BF、MF、LF去除凋落物后Rs值分别为3.01,5.21,5.24和2.88 μmol·m-2·s-1.GL、BF、MF和LF中RA对Rs的贡献分别为23.79％,19.72％,22.20％和25.37％.演替阶段对Rs有显着影响(P＜0.05).回归分析发现,RA与细根生物量呈正相关(P＜0.01),RH与森林凋落物质量呈显著正相关(P＜0.05).试验的结果强调了演替阶段对土壤呼吸不同成分的重要性及其对估算森林碳汇潜力的重要性.
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| 关 键 词： | 土壤呼吸 森林演替 生物因子 非生物因子 |
Soil respiration and its components along different successional stages in the boreal biome |
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| Authors: | SUN He-Yi YAN Guo-Yong XING Ya-Juan WANG Qing-Gui |
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| Abstract: | Understanding the changes of soil respiration and its components with forest succession is essential for long-term carbon cycle models and its sequestration underground.To examine the change of soil respiration and its influencing mechanism with forest succession,four different successional stages of grassland (GL),Betula platyphylla forest (BF),Betula platyphylla and Larix gmelinii mixed forest (MF),Larix gmelinii forest (LF) were selected in boreal zone in the Greater Khingan Mountains of northeast China in 2019,and the trenching method was used to determine autotrophic (RA) and heterotrophic (RH) respiration.Our results showed that the soilrespiration (Rs) ofGL,BF,MF and LF were 3.11,5.68,5.54 and 4.69 μmol · m-2 · s-1 RH were 2.374.56,4.31 and 3.50 μmol · m-2 · s-1 RA were 0.741.12,1.23 and 1.19 μmol · m-2 · s-1 respectively and Rs values in exclusion litter of GL,BF,MF and LF were 3.01,5.21,5.24 and 2.88 μmol · m-2 · s-1,respectively.The contribution of RA to Rs about GL,BF,MF,and LF was 23.79％,19.72％,22.20％ and 25.37％,respectively.Successional stages had a significant effect on Rs (P ＜ 0.05).Regression analysis found that RA was positively correlated with fine root biomass (P ＜ 0.01),and that RH was significantly positively correlated with forest litter mass (P ＜ 0.05).Our results highlight the importance of succession stages to different components of soil respiration and its significance to the estimating forest carbon sink potential. |
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| Keywords: | soil respiration forest succession biotic factors abiotic factors |
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