Effects of long-term herbaceous plant restoration on microbial communities and metabolic profiles in coal gangue-contaminated soil

Zheng, Sheng; Wang, Yi-wang; Lai, Jin-long; Zhang, Y.; Luo, Xin

doi:10.1016/j.envres.2023.116491

Cited by 15 publications

(2 citation statements)

References 63 publications

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“…With sufficient nutrients, microorganisms have vigorous activities; therefore, they expand microbial species and promote the stability of microbial functions. Moreover, the porous structure of biochar adsorbs free nutrients, changes soil nutrient cycling, and induces the development of microbial communities with specific physiological characteristics, thus altering the metabolic pathway of soil microorganisms [27,41,42].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Soil Fertility Quality under Biochar Combined with Nitrogen in an Irrigated Wheat Field in Northern Xinjiang, China

Yang,

Wang,

Guo

et al. 2023

Agronomy

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A randomized block field experiment was conducted in the irrigated area of northern Xinjiang, China, to clarify the effects of biochar (0, 30 × 103 kg·hm−2 (B)) combined with nitrogen (0, 150 (N1), and 300 kg·hm−2 (N2)) on soil fertility, which was represented by CK, B, N1, N2, BN1, and BN2, respectively. The performance of eleven indices related to soil chemical, physical, and biological properties was evaluated by factor analysis and cluster analysis to determine the most appropriate mode for soil fertilization and to identify the main soil environmental factors affecting wheat yield under biochar combined with nitrogen. The results indicated that the first factor was the activity factor, including the Shannon index, McIntosh index, and Simpson index. The second factor was the available nutrient factor, including organic matter, available phosphorus, and available potassium. Factor 3 can be taken as the nutrient-supplying and retaining factor containing total phosphorus, total potassium, and bacterial quantity. The highest score of soil quality was observed in the BN1 treatment, followed by the BN2 and B treatments, which were almost in line with the results of wheat yields. Cluster analysis classified six treatments into four main groups on the basis of the measured parameters, which was mostly consistent with the results of soil quality scores. Considering both economic and environmental benefits, 30 × 103 kg·hm−2 biochar combined with 150 kg·hm−2 nitrogen was the best combination to restore crop productivity and soil quality and to achieve nitrogen decrease and benefit increase. This study provided the scientific basis for the rational fertilization and scientific management of biochar combined with nitrogen fertilizer in the irrigated area of northern Xinjiang, China.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Soil Fertility Quality under Biochar Combined with Nitrogen in an Irrigated Wheat Field in Northern Xinjiang, China

Yang,

Wang,

Guo

et al. 2023

Agronomy

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“…Compared with other pollutants, soil heavy metal pollution is hidden and enriched, difficult to degrade in the environment, and widely distributed in nature. The increasing severity of heavy metal pollution in soil has led to soil fertility degradation, reduced crop yield, and decreased quality, seriously affecting environmental quality and sustainable economic development, and threatening human food safety [1][2][3]. The urban soil has a more serious problem of excessive Zn content, which is concentrated in the mining, smelting, coal, and chemical industries around the cities [4].…”

Section: Introductionmentioning

confidence: 99%

Performance and Mechanism of Zn-Contaminated Soil through Microbe-Induced Calcium Carbonate Precipitation

et al. 2023

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Zn is a toxic heavy metal that seriously endangers human health and ecological stability. For a long time, traditional remediation techniques have been used to remediate Zn-contaminated soil prone to other problems such as secondary contamination. In recent years, due to the great danger posed by Zn pollution, there has been an increasing interest in applying eco-friendly and sustainable methods to remediate Zn-contaminated soil. Therefore, in this study, microbially induced calcium carbonate precipitation (MICP) technology was used to bioremediate zinc ions by transforming ionic heavy metals into insoluble solid-phase minerals. Through the unconfined compressive strength (UCS) test, direct shear (DS) test, and penetration test (PT), the results showed that the unconfined compressive strength of the treated specimens increased by 187.2~550.5%, the cohesion increased significantly compared with the internal friction angle of specimens, and the permeability coefficient can be reduced by at least one order of magnitude. During the treatment of Zn pollutants, the mobility of heavy metal zinc ions was significantly reduced, the percentage of exchangeable state Zn content was significantly reduced, and the leaching concentration of zinc ions in Zn-contaminated soil was reduced to about 20 mg/L, which was significantly lower than the limit in the standard (100 mg/L). These results were further confirmed by scanning electron microscope (SEM) and X-ray diffraction (XRD) analyses, which indicated coprecipitation of calcium carbonate (CaCO3) and ZnCO3. The microbial solidification/stabilization of Zn-contaminated soil was most effective when the curing age of 28 d, the cementation solution concentration of 1 mol/L, and the cementation solution ratio of 1:2. Therefore, the bio-immobilization of zinc ions by MICP has the potential for application as a low-cost and eco-friendly method for heavy metal remediation.

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OmicShare tools: A zero‐code interactive online platform for biological data analysis and visualization

Mu,

Chen,

Huang

et al. 2024

iMeta

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Effects of long-term herbaceous plant restoration on microbial communities and metabolic profiles in coal gangue-contaminated soil

Cited by 15 publications

References 63 publications

Evaluation of Soil Fertility Quality under Biochar Combined with Nitrogen in an Irrigated Wheat Field in Northern Xinjiang, China

Evaluation of Soil Fertility Quality under Biochar Combined with Nitrogen in an Irrigated Wheat Field in Northern Xinjiang, China

Performance and Mechanism of Zn-Contaminated Soil through Microbe-Induced Calcium Carbonate Precipitation

OmicShare tools: A zero‐code interactive online platform for biological data analysis and visualization

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