Sustainability of Urban Soil Management: Analysis of Soil Physicochemical Properties and Bacterial Community Structure under Different Green Space Types

Soil bacterial communities play a key role in nutrient cycling and ecosystem functioning. This study aims to reveal how green space type impacts soil quality and the bacterial community, which finally contributes to suggesting strategies for managing sustainable environments in urban areas. For this purpose, urban green space soils in this study are divided into four different types; park green space (PARK), street green space (STREET), attached green space (ATTACH) and residential green space (RESID). Results showed that significant differences were observed for soil physicochemical properties. Soil organic matter, total nitrogen, soil moisture content and available nitrogen in the ATTACH and PARK soils were significantly higher than in the STREET and RESID soils. Across the four green space types, the structure of bacterial communities was dominated by Proteobacteria, Actinobacteria and Chloroflexi at the phylum level. The diversity and richness of bacteria were significantly higher in the PARK and ATTACH soils than in the RESID and STREET soils. Results of principal component analysis (PCoA) showed that soil bacterial communities could be clustered into four different groups according to different green space types. In addition, analysis of similarities (ANOSIM) also implied that soil samples differed significantly from others. Redundancy analysis (RDA) and Spearman correlation analysis both showed that the contents of soil organic matter, total nitrogen, soil moisture and pH had great influence on the structures of bacterial communities. In summary, these results suggest that soil physicochemical properties and bacterial communities can be strongly affected by green space types, and thus, objective assessment of a particular measure can be provided to land managers and policy makers for informed decision-making in urban development and sustainability.

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Changes in soil physicochemical properties and bacterial communities at different soil depths after long-term straw mulching under a no-till system

SOIL ◽

10.5194/soil-7-595-2021 ◽

2021 ◽

Vol 7 (2) ◽

pp. 595-609

Author(s):

Zijun Zhou ◽

Zengqiang Li ◽

Kun Chen ◽

Zhaoming Chen ◽

Xiangzhong Zeng ◽

...

Keyword(s):

Physicochemical Properties ◽

Bacterial Communities ◽

Bacterial Abundance ◽

Soil Physicochemical Properties ◽

Organic C ◽

Straw Mulching ◽

Soil Bacterial Communities ◽

No Till ◽

Relative Abundances

Abstract. Conservation tillage has attracted increasing attention over recent decades, mainly due to its benefits for improving soil organic matter content and reducing soil erosion. However, the effects of long-term straw mulching under a no-till system on soil physicochemical properties and bacterial communities at different soil depths are still unclear. In this 12-year experiment of straw removal (CK) and straw mulching (SM) treatments, soil samples were collected at 0–5, 5–10, 10–20, and 20–30 cm soil depths. The results showed that the contents of organic carbon (C), nitrogen (N), and phosphorus (P) fractions, and bacterial abundance significantly decreased, whereas pH significantly increased with soil depth. Compared with CK, SM significantly increased total N, inorganic N, available P, available potassium, and soil water content at 0–5 cm, total organic C content at 0–10 cm, and dissolved organic C and N contents at 0–20 cm. Regarding bacterial communities, SM increased the relative abundances of Proteobacteria, Bacteroidetes, and Acidobacteria but reduced those of Actinobacteria, Chloroflexi, and Cyanobacteria. Bacterial Shannon diversity and Shannon's evenness at 0–5 cm were reduced by SM treatment compared to CK treatment. Furthermore, SM increased the relative abundances of some C-cycling genera (such as Terracidiphilus and Acidibacter) and N-cycling genera (such as Rhodanobacter, Rhizomicrobium, Dokdonella, Reyranella, and Luteimonas) at 0–5 cm. Principal coordinate analysis showed that the largest difference in the composition of soil bacterial communities between CK and SM occurred at 0–5 cm. Soil pH and N and organic C fractions were the major drivers shaping soil bacterial communities. Overall, SM treatment is highly recommended under a no-till system because of its benefits to soil fertility and bacterial abundance.

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Soil bacterial community triggered by organic matter inputs supports a high-yielding pear production

10.5194/soil-2021-95 ◽

2021 ◽

Author(s):

Li Wang ◽

Xiaomei Ye ◽

Hangwei Hu ◽

Jing Du ◽

Yonglan Xi ◽

...

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Bacterial Community ◽

Bacterial Communities ◽

Structural Equation ◽

Crop Production ◽

Bacterial Community Composition ◽

Soil Microbiome ◽

High Yield ◽

Common Features

Abstract. The roles of microorganisms in enhancing crop production have been demonstrated for a range of cropping systems. Most studies to date, however, have been confined to a limited number of locations, making it difficult to identify general soil biotic and abiotic characteristics underpinning the yield-promotion across various locations. This knowledge gap limits our capacity to harness soil microbiome to improve crop production. Here we used high-throughput amplicon sequencing to investigate the common features of bacterial community composition, ecological networks and physicochemical properties in six yield-invigorating and adjacent yield-debilitating orchards. We found that yield-invigorating soils exhibited higher contents of organic matter than yield-debilitating soils and harboured unique bacterial communities. Greater alpha diversity and higher relative abundances of Planctomycetes and Chloroflexi were observed in yield-debilitating soils. Co-occurrence network analysis revealed that yield-invigorating soils displayed a greater number of meta-modules and a higher proportion of negative links to positive links. Chloroflexi was recognized as a keystone taxon in manipulating the interaction of bacterial communities in yield-invigorating soils. Structural equation modelling showed that soil organic matter, beta diversity of bacterial community, and network connector (Chloroflexi) were key factors supporting high-yield pear production. Altogether, we provide evidence that yield-invigorating soils across a range of locations appear to share common features, including accumulation of soil organic matter, higher microbial diversity, enrichment of key taxa like Chloroflexi, and maintaining a competitive network. These findings have implications for science-based guidance for sustainable food production.

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SOIL ORGANIC MATTER AND SOIL PHYSICOCHEMICAL PROPERTIES ASSOCIATED WITH FOREST FIRES IN CENTRAL TAIWAN

Soil Science ◽

10.1097/ss.0b013e31818a2c72 ◽

2008 ◽

Vol 173 (11) ◽

pp. 768-778 ◽

Cited By ~ 1

Author(s):

Po-Neng Chiang ◽

Shun-Yao Zhuang ◽

Ya-Nan Wang ◽

Wei Wang ◽

Ming-Kuang Wang ◽

...

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Physicochemical Properties ◽

Forest Fires ◽

Soil Physicochemical Properties ◽

Central Taiwan

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Dynamic changes in the rhizosphere bacterial community in monoculture and intercropping maize and soybean during various crop growth stages

10.21203/rs.3.rs-49276/v3 ◽

2020 ◽

Author(s):

Han Li ◽

Luyun Luo ◽

Bin Tang ◽

Huanle Guo ◽

Zhongyang Cao ◽

...

Keyword(s):

Bacterial Community ◽

Physicochemical Properties ◽

Bacterial Communities ◽

Rhizosphere Soil ◽

Crop Growth ◽

Soil Samples ◽

Growth Stages ◽

Soil Physicochemical Properties ◽

Crop Growth Stages ◽

Rhizosphere Bacterial Communities

Abstract Although rhizosphere microorganisms have been studied for a long time, rhizosphere microbial communities based on monoculture and intercropping soybean and maize have rarely been studied. To define the effect of crop monoculture and intercropping on soil physicochemical properties and rhizosphere bacterial communities, field experiments were conducted using maize and soybean cultivars at five different crop growth stages, including monoculture maize, monoculture soybean and maize-soybean intercropping. The rhizosphere bacterial communities were analyzed by using the 16S rRNA Illumina sequencing. The pH and soil organic matter (SOM) were the key factors affecting crop rhizosphere soil bacterial communities. The intercropping soybean-maize increased the available phosphorus (AP) content at five different crop growth stages. And the available potassium (AK) content in the intercropping soybean soil samples was higher than corresponding monoculture soil samples. The content of available cadmium (ACd) in monoculture soybean rhizosphere soil samples decreased and then increased, but the intercropping soybean soil samples indicated an opposite trend. Proteobacteria, Chloroﬂexi, Acidobacteria, Actinobacteria and Firmicutes were the dominant phyla in the soybean and maize rhizosphere soil samples. Crops of the same plant species showed little difference in the bacterial community diversity under the two planting modes. The results indicated the intercropping planting pattern altered the absorption of ACd in the maize and soybean soil since the S2 stage and showed a different change in different crop growth stages. And the maize-soybean intercropping system also changed the bacterial community and soil physicochemical properties.

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Influences of land reclamation on soil bacterial communities of abandoned salt pans in the Yellow River Delta

10.22541/au.163251189.95628732/v1 ◽

2021 ◽

Author(s):

Yihao Zhu ◽

Xiliang Song ◽

Xiaoli Liu ◽

Weifeng Chen ◽

Xuchang Niu ◽

...

Keyword(s):

Bacterial Community ◽

Physicochemical Properties ◽

Soil Nutrients ◽

Bacterial Communities ◽

Land Reclamation ◽

Bacterial Community Composition ◽

Soil Physicochemical Properties ◽

Salt Pans ◽

Α Diversity ◽

Relative Abundances

Reclamation has been widely accepted to restore abandoned lands. Most studies focused on the improvement of land reclamation in soil nutrients and microbial activities. However, the effects of reclamation time on bacterial communities of abandoned salt pans are still unclear. The object of this study is to: i) assess the successional change of soil physicochemical properties and bacterial communities in reclaimed abandoned salt pans with different reclamation histories, and ii) figure out the main limit factors on the improvement of soil quality in reclaimed abandoned salt pans. The soils in a farmland (RTBL) and six abandoned salt pans with 1 year (RT1), 2 years (RT2), 3 years (RT3), 4 years (RT4), 8 years (RT8), and 9 years (RT9) of reclamation were sampled to investigate the temporal variation of soil properties, heavy metal content, bacterial community composition, and diversity. Results showed that the soil bulk density (BD), total dissolved salt (SS), median particle size (MMAD) decreased with the increase of reclamation time, while soil nutrient (soil organic matter, total nitrogen, available phosphorus, available potassium) showed an opposite trend. The bacterial α-diversity increased first, then decrease. Land reclamation enhanced the relative abundances of Acidobacteria, Chloroflexi, and Actinobacteria but reduced the relative abundances of Proteobacteria, Gemmatimonadetes, and Bacteroidetes. Compared with RTBL, the soil nutrients and bacterial community structure in RT1, RT2, RT3, and RT4 showed a significant difference.Therefore, reclamation time is a vital driving force for restoring soil physicochemical properties and bacterial communities in abandoned

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Response of plant diversity and soil physicochemical properties to different gap sizes in a Pinus massoniana plantation

PeerJ ◽

10.7717/peerj.12222 ◽

2021 ◽

Vol 9 ◽

pp. e12222

Author(s):

Qian Lyu ◽

Jiangli Liu ◽

Junjie Liu ◽

Yan Luo ◽

Luman Chen ◽

...

Keyword(s):

Organic Matter ◽

Soil Moisture ◽

Soil Organic Matter ◽

Plant Diversity ◽

Soil Bulk Density ◽

Soil Physicochemical Properties ◽

Forest Gap ◽

Herb Layer ◽

Soil Layers ◽

Forest Gaps

As one means of close-to-nature management, forest gaps have an important impact on the ecological service function of plantations. To improve the current situation of P. massoniana plantations, three different sizes of forest gaps (large gaps, medium gaps and small gaps) were established to observe whether gap setting can improve the soil fertility and plant diversity of forest plantations. The results showed that compared with the control, the soil organic matter content of different soil layers increased significantly in the medium forest gap and large forest gap. The content of soil organic matter in the surface layer of the middle gap had the largest increase (80.64%). Compared with the control, the content of soil-available potassium between different soil layers decreased significantly by 15.93% to 25.80%. The soil hydrolysable nitrogen reached its maximum under the medium gap. Soil moisture showed significant changes among different gap treatments, different soil layers and their interaction, decreasing significantly in large gaps and small gaps but increasing significantly in medium gaps. The soil bulk density decreased significantly compared with the control, and the surface soil reached the minimum in the medium gap. There were different plant species in forest gaps of different sizes, and shrub layer plants were more sensitive to gap size differences than herb layer plants. The plant diversity indices of the shrub layer increased significantly and showed a maximum under the medium gap. The plant diversity of the herb layer showed the opposite trend, and the Shannon-Wiener index, Simpson index and Pielou index were significantly lower than those of the control. RDA showed that different gap treatments had significant effects on the distribution of plants under the forest. Soil available potassium, soil moisture and soil bulk density affected the distribution and diversity of plants under the forest, serving as the limiting factors of plant growth. In forest management, if we strictly consider the improvement of plant diversity and soil physicochemical properties, these results suggest that a medium gap should be established in a plantation for natural restoration.

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