Effects of mineral-solubilizing microbial strains on the mechanical responses of roots and root-reinforced soil in external-soil spray seeding substrate

Li, Chong; Jia, Zhaohui; Yuan, Yingdan; Cheng, Xuefei; Shi, Jichang; Tang, Xinggang; Wang, Yuhao; Peng, Xiaonan; Dong, Yiqiao; Ma, Shilin; Li, Qinyu; Liu, Xin; Chen, Jiadong; Zhang, Jinchi

doi:10.1016/j.scitotenv.2020.138079

Cited by 20 publications

(16 citation statements)

References 86 publications

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“…When the change curve attained its peak and began to decline, the microbes were transferred to a sterilized plastic bottle and stored in a refrigerator. In our previous research, we found that the addition of NL-11, NL-11 + NL-15, and NL-1 + NL-11 + NL-15 resulted in significant changes in the photosynthetic system and roots of R. pseudoacacia and L. bicolor [21]. Therefore, we selected these three inoculants and treatment methods to investigate the responses of plant growth and root nodulation.…”

Section: Seed Test Material Microbial Strains and Soilmentioning

confidence: 99%

“…The soil characteristics included available K, 100.25 mg•kg −1 and available P, 9.89 mg•kg −1 , at a pH of 7.25. Prior to the pot experiments, the soil was sifted through a 5-mm sieve and mixed with wood fiber, organic fertilizer, peat soil, and dolostones rock powder as nursery substrates (soil/wood fiber/organic fertilizer/peat soil/rock powder, 92:0.7:5:2:0.3) [21].…”

Section: Seed Test Material Microbial Strains and Soilmentioning

confidence: 99%

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Rock-Solubilizing Microbial Inoculums Have Enormous Potential as Ecological Remediation Agents to Promote Plant Growth

Jia

Meng

et al. 2021

Forests

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Anthropogenic overexploitation poses significant threats to the ecosystems that surround mining sites, which also have tremendous negative impacts on human health and society safety. The technological capacity of the ecological restoration of mine sites is imminent, however, it remains a challenge to sustain the green restorative effects of ecological reconstruction. As a promising and environmentally friendly method, the use of microbial technologies to improve existing ecological restoration strategies have shown to be effective. Nonetheless, research into the mechanisms and influences of rock-solubilizing microbial inoculums on plant growth is negligible and the lack of this knowledge inhibits the broader application of this technology. We compared the effects of rock-solubilizing microbial inoculums on two plant species. The results revealed that rock-solubilizing microbial inoculums significantly increased the number of nodules and the total nodule volume of Robinia pseudoacacia L. but not of Lespedeza bicolor Turcz. The reason of the opposite reactions is possibly because the growth of R. pseudoacacia was significantly correlated with nodule formation, whereas L. bicolor’s growth index was more closely related to soil characteristics and if soil nitrogen content was sufficient to support its growth. Further, we found that soil sucrase activity contributed the most to the height of R. pseudoacacia, and the total volume of root nodules contributed most to its ground diameter and leaf area. Differently, we found a high contribution of total soil carbon to seedling height and ground diameter of L. bicolor, and the soil phosphatase activity contributed the most to the L. bicolor’ s leaf area. Our work suggests that the addition of rock-solubilizing microbial inoculums can enhance the supply capacity of soil nutrients and the ability of plants to take up nutrients for the promotion of plant growth. Altogether, our study provides technical support for the practical application of rock-solubilizing microbes on bare rock in the future.

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Section: Seed Test Material Microbial Strains and Soilmentioning

confidence: 99%

Section: Seed Test Material Microbial Strains and Soilmentioning

confidence: 99%

Rock-Solubilizing Microbial Inoculums Have Enormous Potential as Ecological Remediation Agents to Promote Plant Growth

Jia

Meng

et al. 2021

Forests

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“…The shear strength parameters, the cohesion (c) and internal friction angle (ϕ), were calculated automatically by the software installed on the PC. The calculations were in strict accordance with the Chinese Standards for Soil Test Methods (GB/T50123-1999), with the following equations being used to calculate the results [42]:…”

Section: Determination and Calculation Of Shear Strengthmentioning

confidence: 99%

Effects of Vegetation Type on Soil Shear Strength in Fengyang Mountain Nature Reserve, China

Liu

Cheng

Wang

et al. 2021

Forests

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Shear strength is an important mechanical property of soil, as its mechanical function plays critical roles in reducing land degradation and preventing soil erosion. However, shear strength may be affected by vegetation type through changes in the soil and root patterns. To understand the influences of different types of vegetation on shear strength, the soil shear indices of three typical vegetation types (broad-leaved forest, coniferous broad-leaved mixed forest, and grassland) were studied and evaluated at the Fengyang Mountain Nature Reserve, China. We employed a direct shear apparatus to measure the soil shear resistance index. We quantified the soil porosity, moisture content, and composition of particle size to determine the properties of the soil, and a root scanner was used to quantify the root index. The results revealed that there were significant differences in shear resistance indices at the stand level. Between the three vegetation types, the internal friction angle of the broad-leaved forest was the largest and the cohesion was the smallest. The soil moisture content and porosity of the coniferous broad-leaved mixed forest were higher than those of the broad-leaved forest, and the root volume density (RVD/cm3) of the broad-leaved forest was higher than that of the coniferous and broad-leaved mixed forest and grassland. Structural equation modeling results show that the soil particle size and root characteristics indirectly impacted the soil water content by affecting porosity, which finally affected shear strength. In general, there were significant differences in soil properties and plant root indices between the different stands, which had an impact on soil shear strength.

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“…These microorganisms generated abundant acetic acid in their secretions, which consequently lowered the pH of the medium and reduced the diameter of mineral particle sizes. Additionally, they signi cantly increased the concentrations of accessible nutrients in soils, which had a positive impact on plant growth (Jia et al, 2021;Li et al, 2021a;Li et al, 2020;Li et al, 2021b;Wu et al, 2022;Wu et al, 2017a;Wu et al, 2017b;Wu et al, 2017c). The inoculation of these microorganisms can signi cantly improve the e cacy of mine site restoration.…”

Section: Introductionmentioning

confidence: 99%

Plant and native microorganisms amplify the positive effects of microbial inoculant

Li¹,

Jia²,

Ma³

et al. 2022

Preprint

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Aims: Microbial inoculants can be used to restore abandoned mines because of their positive effects on plant growth and soil nutrients. Currently, soils in greenhouse pot studies are routinely sterilized to eradicate microorganisms, allowing for better inoculant colonization. Large-scale field sterilization of abandoned mining site soils for restoration is difficult, though. In addition, microbial inoculants have an impact on plants. Plants also have an impact on local microbes. The interactions between microbial inoculants, native microorganisms, and plants, however, have not been studied. Methods: We created a pot experiment utilizing the soil and microbial inoculant from a previous experiment because it promoted plant growth in that experiment. To evaluate the effects of the plant, native microorganisms, and microbial inoculants, we assessed several indicators related to soil elemental cycling and integrated them into the soil multifunctionality index. Results: The addition of microbial inoculant and sterilizing treatment had a significant impact on alfalfa's growth. When exposed to microbial inoculant treatments, the plant and sterilization treatments displayed radically different functional characteristics, where most of the unsterilized plant treatment indices were higher than those of the others. The addition of microbial inoculant significantly increased soil multifunctionality in plant treatments, particularly in the unsterilization-plant treatment, where the increase in soil multifunctionality was 260%. The effect size result showed that the positive effect of microbial inoculant on soil multifunctionality and unsterilization-plant treatment had the most significant promotion effect. Conclusion: Plant and native microorganisms amplify the positive effects of microbial inoculant.

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Effects of mineral-solubilizing microbial strains on the mechanical responses of roots and root-reinforced soil in external-soil spray seeding substrate

Cited by 20 publications

References 86 publications

Rock-Solubilizing Microbial Inoculums Have Enormous Potential as Ecological Remediation Agents to Promote Plant Growth

Rock-Solubilizing Microbial Inoculums Have Enormous Potential as Ecological Remediation Agents to Promote Plant Growth

Effects of Vegetation Type on Soil Shear Strength in Fengyang Mountain Nature Reserve, China

Plant and native microorganisms amplify the positive effects of microbial inoculant

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