The potential of soil endemic microorganisms in ameliorating the physicochemical properties of soil subjected to a freeze-thaw cycle

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia Pub Date : 2024-08-24 DOI:10.1016/j.pedobi.2024.150988

Sudabeh Gharemahmudli , Seyed Hamidreza Sadeghi , Ali Najafinejad

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Abstract

Establishing soil biological crusts will result in the long-term restoration of ecosystems. Nonetheless, little research has been conducted to demonstrate the influence of soil endemic microorganisms on suppressing the adverse effects of freezing-thawing on soil properties. This current study evaluated the formation of biological crusts, the enhancement of physical and chemical characteristics of soil, and surface soil stability by inoculating native bacteria and cyanobacteria into the soil during a freezing-thawing cycle. The soil was collected from the Badranlou Region in North Khorasan Province, Northern Iran, and native bacteria and cyanobacteria were isolated, identified, chosen, and cultured. The native treatments of bacteria and cyanobacteria were then inoculated in individual bacteria, cyanobacteria, and combined inoculation of cyanobacteria and bacteria onto an experimental soil in six replications. After 60 days, they were subjected to freezing-thawing conditions to have maximum effect on the soil environment, and finally, the soil surface properties were statistically compared. The results of the significant effect (p<0.001) of inoculation treatments on the physical and chemical properties of the study soil revealed that the carbon, nitrogen, organic matter, phosphorus, potassium, and surface soil stability in bacterial treatment compared to the control treatment increased by 68, 39, 68, 17, 25, 99 %, respectively. While under cyanobacterial treatment, they rose by 83, 61, 83, 18, 73, and 172 %, respectively. The combination inoculation treatment of bacteria and cyanobacteria enhanced the study variables by 73, 66, 73, 25, 58, and 189 %, respectively. Compared to control plots, the soil bulk density in bacterial, cyanobacterial, and compound inoculation treatments was substantially reduced (p<0.001) by 9, 15, and 12 %, respectively. The soil stability, carbon, and organic matter were among the most essential properties of the soil, and they best showed the difference between the various treatments applied. It confirmed the region's potential restoration by inoculating native soil microorganisms.

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土壤特有微生物改善冻融循环土壤理化性质的潜力

建立土壤生物结壳将有助于生态系统的长期恢复。然而，有关土壤特有微生物对抑制冻融对土壤性质的不利影响的研究还很少。本研究评估了在冻融循环期间通过在土壤中接种本地细菌和蓝藻形成生物结壳、提高土壤物理和化学特性以及表层土壤稳定性的情况。土壤采集自伊朗北部北呼罗珊省的巴德兰卢地区，并对本地细菌和蓝藻进行了分离、鉴定、选择和培养。然后将原生处理的细菌和蓝藻以单个细菌、蓝藻以及蓝藻和细菌联合接种的方式接种到实验土壤中，共六次重复。60 天后，对其进行冻融处理，以对土壤环境产生最大影响，最后对土壤表面性质进行统计比较。接种处理对研究土壤理化性质的显著影响（p<0.001）结果显示，细菌处理的碳、氮、有机质、磷、钾和土壤表面稳定性与对照处理相比，分别增加了 68%、39%、68%、17%、25%和 99%。而在蓝藻处理中，它们分别增加了 83%、61%、83%、18%、73% 和 172%。细菌和蓝藻联合接种处理使研究变量分别提高了 73%、66%、73%、25%、58% 和 189%。与对照地块相比，细菌、蓝藻和复合接种处理的土壤容重分别大幅降低了 9%、15% 和 12%（p<0.001）。土壤稳定性、碳和有机质是土壤最基本的属性，它们最能体现不同处理之间的差异。通过接种本地土壤微生物，证实了该地区的修复潜力。

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来源期刊

Pedobiologia 环境科学-生态学

CiteScore

4.20

自引率

8.70%

发文量

审稿时长

64 days

期刊介绍： Pedobiologia publishes peer reviewed articles describing original work in the field of soil ecology, which includes the study of soil organisms and their interactions with factors in their biotic and abiotic environments. Analysis of biological structures, interactions, functions, and processes in soil is fundamental for understanding the dynamical nature of terrestrial ecosystems, a prerequisite for appropriate soil management. The scope of this journal consists of fundamental and applied aspects of soil ecology; key focal points include interactions among organisms in soil, organismal controls on soil processes, causes and consequences of soil biodiversity, and aboveground-belowground interactions. We publish: original research that tests clearly defined hypotheses addressing topics of current interest in soil ecology (including studies demonstrating nonsignificant effects); descriptions of novel methodological approaches, or evaluations of current approaches, that address a clear need in soil ecology research; innovative syntheses of the soil ecology literature, including metaanalyses, topical in depth reviews and short opinion/perspective pieces, and descriptions of original conceptual frameworks; and short notes reporting novel observations of ecological significance.