Predicting microbial responses to changes in soil physical and chemical properties under different land management

Sadeghi, Sara; Petermann, Billi Jean; Steffan, Joshua J.; Brevik, Eric C.; Gedeon, Csongor I.

doi:10.1016/j.apsoil.2023.104878

Cited by 14 publications

(4 citation statements)

References 94 publications

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“…In this study, we conducted an RDA of the soil-dominant microbial community of continuous cucumber cropping and soil environmental factors. The results showed that the dominant bacterial and fungal flora were significantly related to soil physical and chemical factors, which is consistent with the results of previous studies showing that soil physical and chemical properties were influenced by the soil microbial community structure [63,64]. Among them, the bacterial group was significantly positively correlated with soil pH (recall Fig 4A ), and a large number of dominant fungal flora was significantly negatively correlated with soil pH (recall Fig 4B).…”

Section: Influence Of Soil Environmental Factors On the Microbial Com...supporting

confidence: 90%

Response of soil microbial community diversity to continuous cucumber cropping in facilities along the Yellow River irrigation area

Huang

Dong

et al. 2023

PLoS ONE

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Cucumber is an important cash crop; however, continuous cropping obstacles readily occur within the intensive production processes of facility horticulture. This study aimed to determine the effects of continuous cropping on soil quality and the microbial community in the rhizosphere soil of cucumbers. Rhizosphere soil of cucumber planted continuously for 4, 8, and 12 years was investigated, and soil that was not continuously planted was used as the control. Soil physicochemical properties, enzyme activity, microbial diversity, and richness were determined. The results showed that with the increase in continuous cropping years (0, 4, 8, and 12 years), soil total salt content continuously increased, while the pH value significantly decreased. Compared with the control, soil organic matter, alkali-hydrolyzed nitrogen, available phosphorus, available potassium, and nitrate nitrogen contents increased significantly after 4 and 8 years of continuous cropping. Spearman correlation analysis showed that pH was negatively correlated with sucrase or sucrose and available phosphorus was positively correlated with alkaline phosphatase. Compared with the control, the diversity and abundance of bacterial and fungal communities in cucumber rhizosphere soil decreased after 4 and 12 years of continuous cropping. Continuous cropping led to a significant increase in the richness of the dominant phylum of cucumber rhizosphere soil. Principal coordinates analysis showed that, compared with the control, the soil microbial community structure was significantly separated after 4, 8, and 12 years of continuous cropping, and the microbial community structure was most similar after 4 and 8 years of continuous cropping. In addition, redundancy analysis showed that pH was the main driver of soil microbial dominance. In conclusion, continuous cropping of cucumber along the Yellow River irrigation area has led to the deterioration of soil nutrients and microbial communities in that region. This experiment provides a theoretical foundation for addressing the challenges associated with continuous cropping in cucumber cultivation.

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Section: Influence Of Soil Environmental Factors On the Microbial Com...supporting

confidence: 90%

Response of soil microbial community diversity to continuous cucumber cropping in facilities along the Yellow River irrigation area

Huang

Dong

et al. 2023

PLoS ONE

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“…This can be attributed to WC promoting the reproductive development of AMF and influencing the selection and colonization of AMF by host plants ( Shukla et al, 2013 ). OM serves as a carbon source necessary for microbial reproduction and positively affects AMF spore density and colonization, thereby enhancing AMF reproductive capacity to a certain extent ( Bending et al, 2002 ; Shao et al, 2019 ; Sadeghi et al, 2023 ). Interestingly, the relative abundance of Glomus , the dominant genus in the study area, exhibited a pattern of decreasing and then increasing along different altitudinal gradients, which contradicted the trend observed for OM.…”

Section: Discussionmentioning

confidence: 99%

Soil organic matter and water content affect the community characteristics of arbuscular mycorrhizal fungi in Helan mountain, an arid desert grassland area in China

Shao,

Yan,

et al. 2024

Front. Microbiol.

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IntroductionArbuscular mycorrhizal fungi (AMF) are vital in terrestrial ecosystems. However, the community structure characteristics and influencing factors of AMF in the forest ecosystems of arid desert grassland areas require further investigation.MethodsTherefore, we employed high-throughput sequencing technology to analyze the soil AMF community characteristics at different elevations in the Helan mountains.ResultsThe results revealed that significant differences (P < 0.05) were observed in the soil physicochemical properties among different elevations, and these properties exhibited distinct trends with increasing elevation. Through high-throughput sequencing, we identified 986 operational taxonomic units (OTUs) belonging to 1 phylum, 4 classes, 6 orders, 12 families, 14 genera, and 114 species. The dominant genus was Glomus. Furthermore, significant differences (P < 0.05) were observed in the α-diversity of the soil AMF community across different elevations. Person correlation analysis, redundancy analysis (RDA), and Monte Carlo tests demonstrated significant correlations between the diversity and abundance of AMF communities with soil organic matter (OM) (P < 0.01) and soil water content (WC) (P < 0.05).DiscussionThis study provides insights into the structural characteristics of soil AMF communities at various altitudes on the eastern slope of Helan mountain and their relationships with soil physicochemical properties. The findings contribute to our understanding of the distribution pattern of soil AMF and its associations with environmental factors in the Helan mountains, as well as the stability of forest ecosystems in arid desert grassland areas.

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“…The14:0, i14:0, 15:0, i15:0, a15:0, 16:0, i16:0, 16:1ω7c,17:0, a17:0, i17:0, cy‐17:0, 18:0, 18:1ω5c, 18:1ω7c, cy‐19:0values were used as total bacterial PLFA biomarkers (B; White et al., 1979). Additionally, the F/B ratio (the ratio of all the fungal PLFA biomarkers to all the bacterial PLFA biomarker biomass ratios) and the G+/G− ratio (the ratio of gram‐positive bacterial PLFA biomass to gram‐negative bacterial PLFA biomass) were also calculated (Sadeghi et al., 2023). The bacterial stress indicators were also calculated as follows: the cy/pre ratio was represented by the ratio of (cy‐17:0 + cy‐19:0) to (16:1 ω7c + 18:1ω7c) (Fierer et al., 2003).…”

Section: Methodsmentioning

confidence: 99%

Fertilization can accelerate the pace of soil microbial community response to rest‐grazing duration in the three‐river source region of China

Zhou,

Wang,

et al. 2023

Ecology and Evolution

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Overgrazing leads to grassland degradation and productivity decline. Rest‐grazing during the regreen‐up period can quickly restore grassland and fertilization is a common restoration strategy. However, the effects of rest‐grazing time and fertilization on soil microorganisms are unclear in the alpine grasslands. Therefore, the experiment of rest‐grazing time and fertilization was carried out to explore the response of soil microorganisms to rest‐grazing time and fertilization measures. A field control experiment with rest‐grazing time and fertilization as factors have been conducted from the time when grass returned to green till the livestock moved to the summer pasture in Dawu Town of Maqin County of China. The primary treatment we established was the five rest‐grazing time, including rest‐grazing time of 20 days, 30 days, 40 days, 50 days, and traditional grazing was used as a check group. At the same time, the secondary treatment was nitrogen addition of 300 kg·hm−2 in each primary treatment. The results showed that the total phospholipid fatty acid (total PLFA), actinomyces (Act), and arbuscular mycorrhizal fungi (AMF) showed an ever‐increasing biomass with the increase of rest‐grazing time and the highest was at 50 days of rest‐grazing, and they were all significantly higher than CK. In addition, soil microbial biomass carbon‐nitrogen ratio (MBC/MBN) had great influence on the change of microbial community. Applying nitrogen fertilizer can increase the maximum value of biomass of all PLFA groups and the biomass of all PLFA groups changed in an “inverted V” shape with the increase of rest‐grazing time. Besides, instead of MBC/MBN, NO3−‐N was positively correlated with the biomass of all PLFA groups, which actively regulated the trend of microbial functions. The longer rest‐grazing time is more conducive to the biomass of all PLFA groups. However, applying nitrogen fertilizer could break this pattern, namely, the 30 days rest‐grazing would be beneficial to the biomass of all PLFA groups. These findings provide key information that rest‐grazing during the regreen‐up period is benefiscial to the all PLFA groups and fertilization could change the response of microorganisms to rest‐grazing, which provide reference measures for the restoration of degraded alpine meadows.

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Predicting microbial responses to changes in soil physical and chemical properties under different land management

Cited by 14 publications

References 94 publications

Response of soil microbial community diversity to continuous cucumber cropping in facilities along the Yellow River irrigation area

Response of soil microbial community diversity to continuous cucumber cropping in facilities along the Yellow River irrigation area

Soil organic matter and water content affect the community characteristics of arbuscular mycorrhizal fungi in Helan mountain, an arid desert grassland area in China

Fertilization can accelerate the pace of soil microbial community response to rest‐grazing duration in the three‐river source region of China

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