Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11368-019-02532-y |
Impact of vegetation restoration on soil organic carbon stocks and aggregates in a karst rocky desertification area in Southwest China | |
Hu, Ning1,2; Lan, Jiacheng3 | |
通讯作者 | Lan, Jiacheng |
来源期刊 | JOURNAL OF SOILS AND SEDIMENTS
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ISSN | 1439-0108 |
EISSN | 1614-7480 |
出版年 | 2020 |
卷号 | 20期号:3页码:1264-1275 |
英文摘要 | Purpose The objectives of the study were as follows: (a) to determine the response of soil organic carbon (SOC) fractions to vegetation restoration; (b) to examine the contributions of aggregate-associated OC to total soil OC accumulation along vegetation restoration, (c) to identify the factors that affect SOC accumulation along natural vegetation restoration in a karst region in Southwest China. Materials and methods Four vegetation restoration stages, namely, grassland, shrubland, shrub-arbor mixed forestland, and arbor forestland, were compared with cropland (CL). Soil samples were collected at depths of 0-10 cm and separated into five aggregate size fractions. SOC, light fraction OC (LFOC), easily oxidizable OC (EOC), and aggregate-associated OCs were determined for different aggregate sizes and total soil. Results and discussion Natural vegetation restoration increased macroaggregate amount but decreased the fractions of meso- and microaggregates. Vegetation restoration significantly increased total SOC, EOC, and LFOC concentrations and stocks and soil aggregate-associated OC concentrations. The responses of EOC and LFOC in total soil and soil aggregates were more sensitive than those of SOC along with vegetation restoration. Aggregate-associated OC concentrations generally increased with a decrease in aggregate size. Macro- and microaggregate-associated OC stocks increased, but mesoaggregate-associated OC stocks decreased following the conversion of CL to a natural vegetation ecosystem. The increase in SOC stocks was primarily attributed to the macroaggregate-associated OC stocks and their changes. OC concentrations and stocks in total soil and the soil aggregates were significantly positively related to exchangeable calcium content. Conclusions Vegetation restoration considerably affects the amount of soil aggregates, OC concentrations, and stocks in total soil and soil aggregates. Changes in OC concentrations and stocks can be more pronounced in the liable carbon fraction than in total SOC. The increase in SOC was mostly attributed to OC accumulation in macroaggregates. Exchangeable calcium also affected soil OC accumulation in total soil and soil aggregates. |
英文关键词 | Karst area Organic carbon accumulation Soil aggregates Soil organic carbon stocks Vegetation restoration |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000534512900009 |
WOS关键词 | DIFFERENT LAND USES ; LOESS PLATEAU ; FRACTIONS ; MATTER ; DYNAMICS ; SEQUESTRATION ; NITROGEN ; FOREST ; ACCUMULATION ; MECHANISMS |
WOS类目 | Environmental Sciences ; Soil Science |
WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/318505 |
作者单位 | 1.Earthquake Adm Xinxiang City, Xinxiang 453000, Henan, Peoples R China; 2.Southwest Univ, Sch Geog Sci, Chongqing 400715, Peoples R China; 3.Guizhou Normal Univ, State Engn Technol Inst Karst Desertificat Contro, Sch Karst Sci, Guiyang 550001, Peoples R China |
推荐引用方式 GB/T 7714 | Hu, Ning,Lan, Jiacheng. Impact of vegetation restoration on soil organic carbon stocks and aggregates in a karst rocky desertification area in Southwest China[J],2020,20(3):1264-1275. |
APA | Hu, Ning,&Lan, Jiacheng.(2020).Impact of vegetation restoration on soil organic carbon stocks and aggregates in a karst rocky desertification area in Southwest China.JOURNAL OF SOILS AND SEDIMENTS,20(3),1264-1275. |
MLA | Hu, Ning,et al."Impact of vegetation restoration on soil organic carbon stocks and aggregates in a karst rocky desertification area in Southwest China".JOURNAL OF SOILS AND SEDIMENTS 20.3(2020):1264-1275. |
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