长白山阔叶红松林表层矿质土壤不同组分中有机碳及氮库特征研究

doi:10.7525/j.issn.1673-5102.2014.03.014

植物研究 ›› 2014, Vol. 34 ›› Issue (3): 372-379.doi: 10.7525/j.issn.1673-5102.2014.03.014

长白山阔叶红松林表层矿质土壤不同组分中有机碳及氮库特征研究

汲常萍¹；王慧梅^1*；王文杰¹；韩士杰²

1.东北林业大学森林植物生态学教育部重点实验室，哈尔滨　150040；2.中国科学院沈阳应用生态研究所，沈阳　110016

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2014-05-20 发布日期:2014-05-20
通讯作者: 王慧梅
基金资助:

Organic C and N in Various Surface Mineral Soil Fractions in the Broadleaved Korean Pine Mixed Forests in Changbai Mt.

JI Chang-Ping;WANG Hui-Mei*;WANG Wen-Jie;HAN Shi-Jie

1.Key Laboratory of Forest Plant Ecology,Ministry of Education,Northeast Forestry University,Harbin　150040；2.Research Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang　110016

Received:1900-01-01 Revised:1900-01-01 Online:2014-05-20 Published:2014-05-20
Contact: WANG Hui-Mei
Supported by:

摘要/Abstract

摘要： 以长白山天然阔叶红松林为研究对象，采用物理化学分级方法将其土壤分成5个具有不同稳定性特征的组分：沙和团聚体组分（SA）、酸不溶组分（AI）、易氧化组分（EO）、颗粒态组分（P）和可溶性组分（S）。分析各组分的质量分数、有机碳及氮浓度、C/N及其有机碳、氮的分配比例，旨在探讨阔叶红松林的碳截获和肥力供应潜力机制。研究结果显示：稳定土壤组分（AI和SA）的C/N比活跃土壤组分（P和EO）大2~8倍，显示了土壤组分对于土壤微生物分解的不同稳定性特征；接近90%的土壤质量集中在稳定（AI和SA）土壤组分上，导致土壤组分中有机碳的分配比例最大者为AI（42.7%）和SA（29.5%）；活跃土壤组分（P、EO和S）中的有机碳比稳定性组分（AI和SA）高出2~6倍，而氮浓度则高出4~37倍，这使得氮库由活跃组分EO（33.6%）、P（19.7%）和稳定组分AI（21.1%）、SA（24.3%）构成。本研究揭示长白山阔叶红松林土壤有机碳主要截获于稳定性组分，而氮则在活跃组分与稳定组分中分配相当，这种土壤组分特征利于碳的长期累积和肥力（N）持续快速供应。

关键词: 碳组分, 氮组分, 碳氮比, 分配比例

Abstract: In this paper, taking the natural broadleaved Korean pine mixed forest in Changbai Mt. as research object, 5 soil fractions of sand and stable aggregates (SA), acid insoluble fraction (AI), easily oxidized fraction (EO), particulate fraction (P) and soluble soil fraction (S) with different physic-chemical stabilities were separated by a physicchemical method. Weight percentages, organic C and N concentrations, C/N and allocation proportions of organic C and N in the various fractions were analyzed to explore the mechanism of potential of soil C sequestration and N supply. The results showed that the C/N of stable soil fractions (AI and SA) was 2-8 times higher than that in labile fractions (P and EO), which resulted in the different physic-chemical stability characteristics of soil fractions to soil microbial decomposition. About 90% of the soil quantity occluded on stable fractions (SA and AI), which leaded to the higher organic C in the AI (42.7%) and SA (29.5%) fractions. The organic C concentrations in labile soil fractions (P and EO) were 2-6 times higher than those in stable soil fractions (AI and SA), whereas in term of N, this difference was enlarged to 4-37 times. N was distributed similarly in labile fractions (EO,33.6% and P,19.7%) and stable fractions (AI, 21.1% and SA,24.3%). The results reveal the characteristic of the carbon sequestration is mainly intercepted on the stable components, while N is allocated fairly in the labile fractions and stable fractions in the broad-leaved Korean pine mixed forests in Changbai Mt. area. The characteristic of soil fractions is good for the long-term accumulation of soil carbon, and sustainable and fast supply of soil fertility of N.

Key words: carbon fractions, nitrogen fractions, carbon nitrogen ratio, allocation proportion

中图分类号:

S791.247

汲常萍;王慧梅*;王文杰;韩士杰. 长白山阔叶红松林表层矿质土壤不同组分中有机碳及氮库特征研究[J]. 植物研究, 2014, 34(3): 372-379.

JI Chang-Ping;WANG Hui-Mei*;WANG Wen-Jie;HAN Shi-Jie. Organic C and N in Various Surface Mineral Soil Fractions in the Broadleaved Korean Pine Mixed Forests in Changbai Mt.[J]. Bulletin of Botanical Research, 2014, 34(3): 372-379.

长白山阔叶红松林表层矿质土壤不同组分中有机碳及氮库特征研究

Organic C and N in Various Surface Mineral Soil Fractions in the Broadleaved Korean Pine Mixed Forests in Changbai Mt.

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics

本文评价