scholarly journals Effect Mechanism of Land Consolidation on Soil Bacterial Community: A Case Study in Eastern China

2022 ◽  
Vol 19 (2) ◽  
pp. 845
Author(s):  
Yaoben Lin ◽  
Yanmei Ye ◽  
Shuchang Liu ◽  
Jiahao Wen ◽  
Danling Chen
Keyword(s):  
Heavy Metal ◽  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Soil Health ◽  
Chemical Properties ◽  
Sequencing Technology ◽  
Dominant Bacteria ◽  
Physical And Chemical ◽  
And Chemical Properties

Farmland consolidation is an effective tool to improve farmland infrastructures, soil quality, and sustain a healthy farmland ecosystem and rural population, generating contributions to food security and regional sustainable development. Previous studies showed that farmland consolidation regulates soil physical and chemical properties. Soil microorganisms also play an important role in soil health and crop performance; however, few studies reported how farmland consolidation influence soil microecology. Here, we used DNA sequencing technology to compare bacterial community structure in farmlands with and without consolidation. DNA sequencing technology is the most advanced technology used to obtain biological information in the world, and it has been widely used in the research of soil micro-ecological environment. In September 2018, we collected soil samples in Jiashan County, Zhejiang Province, China, and used DNA sequence technology to compare the bacterial community structure in farmlands with and without consolidation. Our results found that (1) farmland consolidation had significant impacts on soil microbial characteristics, which were mainly manifested as changes in microbial biomass, microbial diversity and community structure. Farmland consolidation can increase the relative abundance of the three dominant bacteria phyla and the three fungal dominant phyla, but it also negatively affects the relative abundance of the six dominant bacteria phyla and the three fungal dominant phyla. (2) Farmland consolidation had an indirect impact on soil bacterial community structure by adjusting the soil physical and chemical properties. (3) The impact of heavy metals on bacterial community structure varied significantly under different levels of heavy metal pollution in farmland consolidation areas. There were 6, 3, 3, and 5 bacterial genera that had significant correlations with heavy metal content in cultivated land with low pollution, light pollution, medium pollution, and heavy pollution, respectively. The number of heavy metal-tolerant bacteria in the soil generally increased first and then decreased under heavy metal polluted conditions. Our study untangled the relationship between varied farmland consolidation strategies and bacteria through soil physcicochemical properties and metal pollution conditions. Our results can guide farmland consolidation strategies and sustain soil health and ecological balance in agriculture.

scholarly journals Impact of an intercropped melon/cowpea system on the coupling between soil bacterial community structure and chemical properties

2021 ◽  
Author(s):  
Jessica Cuartero ◽  
Jose Antonio Pascual ◽  
Juana-María Vivo ◽  
Onurcan Özbolat ◽  
Virginia Sánchez-Navarro ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Cucumis Melo ◽  
Bacterial Community Structure ◽  
Chemical Properties ◽  
First Year ◽  
Soil Bacterial Community Structure ◽  
Phosphorous Content ◽  
The Relationship ◽  
And Chemical Properties

Abstract A greater understanding of the relationship between soil microorganisms and intercropping systems could contribute to the optimization of land use, fostering sustainable and efficient agriculture. This study entails a comparative intercropping assay using cowpea (Vigna unguiculata) and melon (Cucumis melo) under organic management with different patterns and 30% less organic fertilization than that used in monocrops in the first year. The intercropping system changed the bacterial community structure independently of the intercropping pattern and contributed to an increase in soil nitrogen, phosphorous content and melon crop yield. The intercropped systems were characterized by a higher abundance of Pseudomonas (Proteobacteria), which are related to nutrient cycling, and other beneficial microorganisms.

scholarly journals Silicon Application Modulates the Growth, Rhizosphere Soil Characteristics, and Bacterial Community Structure in Sugarcane

2021 ◽  
Vol 12 ◽  
Author(s):  
Quanqing Deng ◽  
Taobing Yu ◽  
Zhen Zeng ◽  
Umair Ashraf ◽  
Qihan Shi ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Enzyme Activities ◽  
Bacterial Community Structure ◽  
Rhizosphere Soil ◽  
Chemical Properties ◽  
Soil Enzyme ◽  
Community Diversity ◽  
Soil Enzyme Activities ◽  
And Chemical Properties

Silicon (Si) deficiency, caused by acidic soil and rainy climate, is a major constraint for sugarcane production in southern China. Si application generally improves sugarcane growth; however, there are few studies on the relationships between enhanced plant growth, changes in rhizosphere soil, and bacterial communities. A field experiment was conducted to measure sugarcane agronomic traits, plant nutrient contents, rhizosphere soil enzyme activities and chemical properties, and the rhizosphere bacterial community diversity and structure of three predominant sugarcane varieties under two Si treatments, i.e., 0 and 200 kg of silicon dioxide (SiO2) ha−1 regarded as Si0 and Si200, respectively. Results showed that Si application substantially improved the sugarcane stalk fresh weight and Si, phosphorus (P), and potassium (K) contents comparing to Si0, and had an obvious impact on rhizosphere soil pH, available Si (ASi), available P (AP), available K (AK), total phosphorus (TP), and the activity of acid phosphatase. Furthermore, the relative abundances of Proteobacteria showed a remarkable increase in Si200, which may be the dominant group in sugarcane growth under Si application. Interestingly, the AP was noticed as a major factor that caused bacterial community structure differences between the two Si treatments according to canonical correspondence analysis (CCA). In addition, the association network analysis indicated that Si application enriched the rhizosphere bacterial network, which could be beneficial to sugarcane growth. Overall, appropriate Si application, i.e., 200 kg SiO2 ha−1 promoted sugarcane growth, changed rhizosphere soil enzyme activities and chemical properties, and bacterial community structures.

scholarly journals Plant–Soil Feedback In Camellia Oleifera And Mixed Gardenia Jasminoides Ellis–Camellia Oleifera Stands Determined By Soil Bacterial Community Analysis

2021 ◽  
Author(s):  
Yun Wang ◽  
Peng Xie ◽  
Jiyun She ◽  
Aihua Deng ◽  
Shaogang Fan
Keyword(s):  
Bacterial Community ◽  
Chemical Properties ◽  
Physicochemical Characteristics ◽  
Soil Bacterial Community ◽  
Physical And Chemical Properties ◽  
Camellia Oleifera ◽  
Gardenia Jasminoides ◽  
Soil Bacterial ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract Purpose: Little is known regarding the combined impact of plant and soil traits on the soil bacterial community. Herein, we assessed physical and chemical properties along with bacterial community structure in soils sampled at different depths (0–20 cm, 20–40 cm, and 40–60 cm) and slope positions (peak, hillside, and bottom), in Camellia oleifera monoculture and mixed Gardenia jasminoides–Camellia oleifera stands. Methods: Soil physicochemical characteristics were determined using standard methods. The composition of soil bacterial communities was evaluated using high-throughput sequencing of the 16S rRNA gene. Results: Soil organic carbon, humus, and total organic contents were higher in G. jasminoides + C. oleifera low-yielding forest than in other stands, however, the NH4+-N levels were significantly lower than that in monoculture. The slope position did not greatly influence soil physical and chemical properties. The dominant bacteria were Proteobacteria, Chloroflexi, Acidobacteria, and Actinobacteria. The alpha and beta diversity and abundance of soil bacterial community were higher in intercropping systems than in monoculture systems. Potassium and nitrogen levels and pH significantly affected the soil microbial community composition. Correlation analysis revealed that alkaline hydrolysable nitrogen and pH were significantly correlated with the input of plant-associated organic matter and dynamic changes of keystone taxa.Conclusion: G. jasminoides improved the physicochemical characteristics of C. oleifera low-yielding soil and greatly affected the soil bacterial community, further improving the soil microecological environment. Therefore, this specific intercropping system is an effective strategy for improving soil health.

scholarly journals Study of Heavy Metals in the Soils of Two Localities in Dolj County

2018 ◽  
Vol 1 (1) ◽  
pp. 352-357
Author(s):  
Gilda-Diana Buzatu ◽  
Ana Maria Dodocioiu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Wastewater Treatment ◽  
Chemical Composition ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Chemical Properties ◽  
Chemical Parameters ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract The study was conducted in two neighboring localities located in the northern county of Dolj, namely Murgasi and Bulzesti. The purpose of the study was twofold: namely, the study of heavy metal loading in order to identify possible pollution areas and to know the soil content of these localities in heavy metals in order to be able to give the verdict on the use of sludge from Craiova wastewater treatment plant as fertilizer on these soils. In order to determine the suitability of sewage sludge from the Craiova wastewater treatment plant as a fertilizer, physical and chemical properties and heavy metal content of the soils in these areas were analysed, as well as the chemical composition of sludge, according to Order 344/2004 of the Ministry of Environment and Water Management of Romania, respectively 13 physical and chemical parameters of the soils in these localities and the chemical composition of the sludge and respectively the quantity of heavy metals to be introduced annually into the soil by using it.

scholarly journals Land-use changes influence soil bacterial communities in a meadow grassland in Northeast China

Solid Earth ◽  
2017 ◽  
Vol 8 (5) ◽  
pp. 1119-1129 ◽  
Author(s):  
Chengyou Cao ◽  
Ying Zhang ◽  
Wei Qian ◽  
Caiping Liang ◽  
Congmin Wang ◽  
...  
Keyword(s):  
Land Use ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Land Use Changes ◽  
Chemical Properties ◽  
Soil Bacterial Communities ◽  
Land Use Types ◽  
Soil Bacterial ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract. The conversion of natural grassland into agricultural fields is an intensive anthropogenic perturbation commonly occurring in semiarid regions, and this perturbation strongly affects soil microbiota. In this study, the influences of land-use conversion on the soil properties and bacterial communities in the Horqin Grasslands in Northeast China were assessed. This study aimed to investigate (1) how the abundances of soil bacteria changed across land-use types, (2) how the structure of the soil bacterial community was altered in each land-use type, and (3) how these variations were correlated with soil physical and chemical properties. Variations in the diversities and compositions of bacterial communities and the relative abundances of dominant taxa were detected in four distinct land-use systems, namely, natural meadow grassland, paddy field, upland field, and poplar plantation, through the high-throughput Illumina MiSeq sequencing technique. The results indicated that land-use changes primarily affected the soil physical and chemical properties and bacterial community structure. Soil properties, namely, organic matter, pH, total N, total P, available N and P, and microbial biomass C, N, and P, influenced the bacterial community structure. The dominant phyla and genera were almost the same among the land-use types, but their relative abundances were significantly different. The effects of land-use changes on the structure of soil bacterial communities were more quantitative than qualitative.

Sign in / Sign up

Export Citation Format

Share Document