[1]樊容源,叶绍明*,张钱春,等. 杉木纯林及其混交林土壤团聚体活性有机碳组分特征[J].西北林学院学报,2023,38(6):20-28.[doi:10.3969/j.issn.1001-7461.2023.06.03]
　FAN Rong-yuan,YE Shao-ming*,ZHANG Qian-chun,et al. Characteristics of Active Organic Carbon Components in Soil Aggregates of Pure Plantation of C.lanceolata and Its Mixed Forest[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2023,38(6):20-28.[doi:10.3969/j.issn.1001-7461.2023.06.03]
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 杉木纯林及其混交林土壤团聚体活性有机碳组分特征()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第38卷
期数:
2023年第6期
页码:
20-28
栏目:
出版日期:
2023-11-30

文章信息/Info

Title:
 Characteristics of Active Organic Carbon Components in Soil Aggregates of Pure Plantation of C.lanceolata and Its Mixed Forest
文章编号:
1001-7461(2023)06-0020-09
作者:
 樊容源; 叶绍明*; 张钱春; 何雅琴; 邓家珍
 (广西大学 林学院，广西 南宁 530004)
Author(s):
 FAN Rong-yuan; YE Shao-ming*; ZHANG Qian-chun; HE Ya-qin; DENG Jia-zhen
 (College of Forestry Guangxi University,Nanning 530004,Guangxi,China)
关键词:
 ; 杉木; 混交林; 土壤团聚体; 活性有机碳组分; 碳库特征指数
Keywords:
Cunninghamia lanceolata;  mixed forest;  soil aggregates;  active organic carbon component;  carbon pool characteristic index
分类号:
S791.27
DOI:
10.3969/j.issn.1001-7461.2023.06.03
文献标志码:
A
摘要:
 为研究杉木纯林及其混交林土壤团聚体活性有机碳组分特征，以广西亚热带地区杉木-米老排、杉木-火力楠混交林及杉木人工纯林土壤为研究对象，分析0～40 cm土层不同粒径(＞2、1～2、0.25～1、＜0.25 mm)团聚体总有机碳及活性有机碳组分含量、储量、贡献率以及碳库特征指数变化。结果表明，杉木纯林及其混交林土壤团聚体主要以＞2mm粒径为主，团聚体占比随粒径减小呈减小趋势；杉木-米老排、杉木-火力楠混交林土壤团聚体总有机碳含量在8.57～38.37 g·kg-1，高于杉木纯林的6.46～24.33 g·kg-1，均随粒径减小而增加，随土层加深而减少；3种林分活性有机碳组分储量表现为低活性有机碳>中活性有机碳>高活性有机碳，均随土层深度增加而减小，大团聚体(＞0.25 mm)占比较大，其对土壤活性有机碳贡献率高，是土壤有机碳的主要载体；杉木-米老排混交林、杉木-火力楠混交林碳库管理指数整体>100%，其效应大小为杉木-火力楠混交林＞杉木-米老排混交林＞杉木纯林。相关性分析表明，TOC(total organic carbon)、LLOC(low labile organic carbon)及MWD(Mean weight diameter)、GMD(geometric mean diameter)与CPMI(carbon pool management index)、CPI(carbon pool index)显著正相关，MLOC、HLOC与各指标相关性不显著。环境因子及粒径分级对TOC、LLOC影响效应一致，MLOC、HLOC因其高敏性及不稳定性对各影响因子响应程度不高。杉木-米老排、杉木-火力楠混交林在土壤稳定性及活性有机碳保持方面优于杉木人工纯林。
Abstract:
 In order to understand the characteristics of active organic carbon components in soil aggregates of pure and mixed Cunninghamia lanceolata plantations,the soils of pure C.lanceolata plantation and mixed plantations of C.lanceolata-Mytilaria laosensis and C.lanceolata-Michelia macclurei in subtropical regions of Guangxi were selected as the research objects.The content,storage,contribution rate and characteristic index of total organic carbon and active organic carbon in aggregates with different particle sizes (>2,1-2,0.25-1,<0.25 mm) in 0-40 cm soil layer were analyzed.The results showed that the soil aggregate sizes of both pure and mixed plantations were greater than >2 mm,and the soil aggregate size decreased with the decrease of grain size.The total organic carbon content of soil aggregates in the mixed plantations ranged from 8.57-38.37 g·kg-1,higher than that of pure plantation (6.462-4.33 g·kg-1); the total organic carbon content increased with the decrease of particle size,but decreased with the depth of soil layer.The stocks of active organic carbon in the three plantations were in the order of low labile organic carbon (LLOC)>moderately labile organic carbon (MLOC)>highly labile organic carbon (HLOC),and all of them decreased with the increase of soil depth.Large aggregates (>0.25 mm) accounted for a large proportion of soil organic carbon and contributed significantly to soil active organic carbon,which served as the main carrier of soil organic carbon.The carbon pool management index of the mixed plantations was greater than 100%,and its effect size was as follows:C.lanceolata-M.macclurei>C.lanceolata-M.laosensis>pure C.lanceolata.Correlation analysis showed that the totall organic carbon (TOC),LLOC,mean weight diameter (MWD) and geometric mean diameter (GMD) were significantly and positively correlated with CPMI and CPI,while MLOC and HLOC were not significantly correlated with each index.Environmental factors and particle size classification had the same effect on TOC and LLOC,while MLOC and HLOC had low response to each influence factor due to their high sensitivity and instability.In conclusion,from the views soil stability and active organic carbon retention,the mixed plantations are better than pure plantation.

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备注/Memo

备注/Memo:
 收稿日期：2023-02-16修回日期：2023-06-01
基金项目：国家自然科学基金项目(32260382)；中央财政林业科技推广项目(2022TG26号)。
第一作者：樊容源。研究方向：森林培育。E-mail:1324528915@qq.com
*通信作者：叶绍明，博士生导师，教授。研究方向：森林经营。E-mail:yshaoming@163.com
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