Calcium forms influence soil organic carbon by mediating labile organic carbon fractions, carbon pool management indices and microbial communities in calcareous alkaline soils

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2024-12-09 DOI:10.1007/s11104-024-07115-6

Xiaolu Dou, Congzhi Zhang, Lin Chen, Qicong Wu, Guixiang Zhou, Donghao Ma, Zhanhui Zhao, Jiabao Zhang

{"title":"Calcium forms influence soil organic carbon by mediating labile organic carbon fractions, carbon pool management indices and microbial communities in calcareous alkaline soils","authors":"Xiaolu Dou, Congzhi Zhang, Lin Chen, Qicong Wu, Guixiang Zhou, Donghao Ma, Zhanhui Zhao, Jiabao Zhang","doi":"10.1007/s11104-024-07115-6","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Background and aims</h3><p>Soil carbon (C) pools influence the global C balance of terrestrial ecosystems. Calcium (Ca) affects soil organic carbon (SOC) by mediating organic-mineral interactions. In this study, we aimed to elucidate the relationships among Ca forms, labile organic carbon (OC) fractions, carbon pool management indices and microbial communities.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>We selected three soils with different calcium carbonate (CaCO<sub>3</sub>) contents: black soil (4.29 g.kg<sup>−1</sup>), fluvo-aquic soil (94.86 g.kg<sup>−1</sup>) and loessial soil (133.87 g.kg<sup>−1</sup>). We measured different Ca forms, microbial communities and labile OC fractions while calculating the soil carbon pool management indices.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The results revealed a significant increase in major Ca forms and a significant decrease (<i>P <</i> 0.05) in labile OC fractions as well as carbon pool management indices in fluvo-aquic soil and loessial soil. The bacterial community diversity decreased, and the dominant bacteria and fungi shifted from oligotrophs to copiotrophs. Ca forms were significantly negatively (<i>P <</i> 0.05) correlated with the labile OC fraction and carbon pool management index (CPMI), and the bacterial community structure was closely related to bound to organic-Ca. Bacteria played a dominant role, and the symbiotic network robustness and complexity of the network modules were greater for bacteria than for fungi in calcareous alkaline soils.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>The results suggested the existence of interactions between Ca forms, labile OC fractions, the CPMI and microbial communities in calcareous alkaline soils. Ca affects the labile OC fractions, which act on the CPMI and change the community composition of microbial (bacterial communities), influencing the SOC content.</p>","PeriodicalId":20223,"journal":{"name":"Plant and Soil","volume":"18 1","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant and Soil","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1007/s11104-024-07115-6","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}

引用次数: 0

Abstract

Background and aims

Soil carbon (C) pools influence the global C balance of terrestrial ecosystems. Calcium (Ca) affects soil organic carbon (SOC) by mediating organic-mineral interactions. In this study, we aimed to elucidate the relationships among Ca forms, labile organic carbon (OC) fractions, carbon pool management indices and microbial communities.

Methods

We selected three soils with different calcium carbonate (CaCO₃) contents: black soil (4.29 g.kg⁻¹), fluvo-aquic soil (94.86 g.kg⁻¹) and loessial soil (133.87 g.kg⁻¹). We measured different Ca forms, microbial communities and labile OC fractions while calculating the soil carbon pool management indices.

Results

The results revealed a significant increase in major Ca forms and a significant decrease (P < 0.05) in labile OC fractions as well as carbon pool management indices in fluvo-aquic soil and loessial soil. The bacterial community diversity decreased, and the dominant bacteria and fungi shifted from oligotrophs to copiotrophs. Ca forms were significantly negatively (P < 0.05) correlated with the labile OC fraction and carbon pool management index (CPMI), and the bacterial community structure was closely related to bound to organic-Ca. Bacteria played a dominant role, and the symbiotic network robustness and complexity of the network modules were greater for bacteria than for fungi in calcareous alkaline soils.

Conclusions

The results suggested the existence of interactions between Ca forms, labile OC fractions, the CPMI and microbial communities in calcareous alkaline soils. Ca affects the labile OC fractions, which act on the CPMI and change the community composition of microbial (bacterial communities), influencing the SOC content.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

期刊介绍： Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.