{"title":"Effects of Soil Exchangeable Calcium in Promoting the Accumulation of Soil Organic Carbon by Karst Vegetation Restoration","authors":"Mingzhi Huang, Jiacheng Lan, Shasha Wang, Junxian Wang, Xue Qi, Lei Liu, Kunqian Yue","doi":"10.1007/s42729-023-01589-6","DOIUrl":null,"url":null,"abstract":"<p>This study aims to determine the differences in soil organic carbon (SOC), easily oxidized organic carbon (EOC), particulate organic carbon (POC), mineral-associated organic carbon (MOC), and exchangeable calcium content under different vegetation restoration and to explore the impact mechanism of soil exchangeable calcium on organic carbon accumulation under different particle sizes of aggregates. Two vegetation restoration methods, namely, the artificially managed Chinese prickly ash (CP) and the naturally restored secondary forest (SF), were used for comparison with the cropland (CL). Soil samples were collected at depths of 0–10 and 10–20 cm. Then, the soil-exchangeable calcium content and SOC, EOC, POC, and MOC content of four aggregate fractions were determined. The soil-exchangeable calcium content, SOC, EOC, POC, and MOC content and stocks substantially increased following vegetation restoration. Correlation analysis showed that soil-exchangeable calcium was positively correlated with SOC, EOC, POC, and MOC contents and stocks and had a linear correlation in CL and an exponential correlation in CP and SF. The correlation coefficients can be arranged as SF > CP > CL. Moreover, soil-exchangeable calcium remarkably affected SOC and EOC accumulation in small aggregates in CL and in large aggregates in CP and SF. After vegetation restoration, exchangeable calcium remarkably increased and affected SOC accumulation. In large aggregates, more organic carbon was fixed through calcium ion adsorption, but the carbon fixation ability of CP and SF was limited.</p>","PeriodicalId":17042,"journal":{"name":"Journal of Soil Science and Plant Nutrition","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Soil Science and Plant Nutrition","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1007/s42729-023-01589-6","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
This study aims to determine the differences in soil organic carbon (SOC), easily oxidized organic carbon (EOC), particulate organic carbon (POC), mineral-associated organic carbon (MOC), and exchangeable calcium content under different vegetation restoration and to explore the impact mechanism of soil exchangeable calcium on organic carbon accumulation under different particle sizes of aggregates. Two vegetation restoration methods, namely, the artificially managed Chinese prickly ash (CP) and the naturally restored secondary forest (SF), were used for comparison with the cropland (CL). Soil samples were collected at depths of 0–10 and 10–20 cm. Then, the soil-exchangeable calcium content and SOC, EOC, POC, and MOC content of four aggregate fractions were determined. The soil-exchangeable calcium content, SOC, EOC, POC, and MOC content and stocks substantially increased following vegetation restoration. Correlation analysis showed that soil-exchangeable calcium was positively correlated with SOC, EOC, POC, and MOC contents and stocks and had a linear correlation in CL and an exponential correlation in CP and SF. The correlation coefficients can be arranged as SF > CP > CL. Moreover, soil-exchangeable calcium remarkably affected SOC and EOC accumulation in small aggregates in CL and in large aggregates in CP and SF. After vegetation restoration, exchangeable calcium remarkably increased and affected SOC accumulation. In large aggregates, more organic carbon was fixed through calcium ion adsorption, but the carbon fixation ability of CP and SF was limited.
期刊介绍:
The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science.
Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration.
Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies.
Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome.
The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.