Article
Soil Science
Sara Paliaga, Vito Armando Laudicina, Luigi Badalucco
Summary: This study compared the classical chloroform fumigation-incubation (CFI) and fumigation-extraction (CFE) methods with a physical method based on N-2 or CO2 high pressurization (N2HP or CO2HP) for microbial cell lysis in two different soils. The results showed that CO2HP was more efficient than the CFE method for causing microbial cell lysis, and the CO2 pressure value and duration were important factors for increasing extractable organic C. However, CO2HP may have caused the release of non-living organic C.
BIOLOGY AND FERTILITY OF SOILS
(2023)
Article
Soil Science
S. A. Schwalb, K. S. Khan, M. Hemkemeyer, S. Heinze, Z. Oskonbaeva, R. G. Joergensen, F. Wichern
Summary: The present study aimed to develop a method for assessing the elemental composition of soil microbial communities. Chloroform fumigation extraction was used to detect the concentrations of secondary and trace elements in soils. It was found that 0.01 M CaCl2 was the best-suited extractant, with a soil-to-extractant ratio of 1:20 and an extraction time of 1 hour. This method successfully extracted elements such as phosphorus, sulphur, potassium, sodium, magnesium, zinc, manganese, copper, nickel, vanadium, boron, silicon, and barium.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2023)
Review
Agronomy
Stefanie Heinze, Michael Hemkemeyer, Sanja Annabell Schwalb, Khalid Saifullah Khan, Rainer Georg Joergensen, Florian Wichern
Summary: This review summarizes the current state of knowledge on microbial biomass in different soils, with a focus on the importance of sulfur (S) and methodological shortcomings. The study shows that microbial biomass in soils is influenced by various factors, including soil pH and organic carbon content. Future research is needed to verify these observations and further explore the relationships between elements in soil and the soil microbial ionome.
Article
Soil Science
Yuhong Li, Muhammad Shahbaz, Zhenke Zhu, Yangwu Deng, Yaoyao Tong, Liang Chen, Jinshui Wu, Tida Ge
Summary: Rice paddy agro-ecosystems play an important role in global carbon sequestration, with unique soil organic carbon mineralization patterns compared to upland or other wetland ecosystems. In oxygen-abundant conditions, SOC bioavailability is a rate-limiting factor for mineralization, while under oxygen-limited or -depleted conditions, microbial biomass, organic C compound recalcitrance, and electron acceptor availability are key regulators. Oxygen-depleted paddy soils have greater recalcitrance in dissolved substrates, likely due to thermodynamic reasons, with iron playing a significant role as an electron acceptor during SOC mineralization.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Geochemistry & Geophysics
Kari M. Finstad, Erin E. Nuccio, Katherine E. Grant, Taylor A. B. Broek, Jennifer Pett-Ridge, Karis J. McFarlane
Summary: Microbial processing of soil organic matter plays a significant role in carbon cycling. This study presents a new biomass extraction method for direct 14C analysis of microbial biomolecules, and compares it to the commonly used laboratory incubations. The results suggest that measurement of Delta 14C of microbial biomass extracts can be a useful alternative to soil incubations.
Article
Soil Science
Yuhong Li, Muhammad Shahbaz, Zhenke Zhu, Anlei Chen, Paolo Nannipieri, Baozhen Li, Yangwu Deng, Jinshui Wu, Tida Ge
Summary: Microbial biomass and electron acceptors like iron oxides play crucial roles in regulating soil organic carbon (SOC) mineralization in paddy soils. Iron oxides increased CO(2) emissions from SOC, while acetate addition decreased SOC mineralization. Changes in microbial biomass affected CO(2) emissions from both acetate and SOC, highlighting the importance of microbial communities in the carbon cycling of anaerobic paddy soils.
BIOLOGY AND FERTILITY OF SOILS
(2021)
Article
Environmental Sciences
Siddhartha Shankar Bhattacharyya, Gerard H. Ros, Karolina Furtak, Hafiz M. N. Iqbal, Roberto Parra-Saldivar
Summary: Soil carbon sequestration (SCS) refers to the uptake of carbon from the atmosphere and its storage in soil, with soil microbial community (SMC) playing a crucial role. Agricultural practices that improve SCS can alter SMC, soil organic matter, and soil aggregates. However, more research is needed to fully understand their contribution to SCS.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Marlon Correa Pereira, Roisin O'Riordan, Carly Stevens
Summary: Urbanization leads to land sealing, causing changes in soil properties that result in reduced microbial activity and decreased soil carbon storage potential.
JOURNAL OF SOILS AND SEDIMENTS
(2021)
Article
Soil Science
Robert W. Brown, David R. Chadwick, Gary D. Bending, Chris D. Collins, Helen L. Whelton, Emma Daulton, James A. Covington, Ian D. Bull, Davey L. Jones
Summary: The cycling of soil organic matter and carbon in the soil is influenced by key macronutrients. Adding stoichiometrically balanced nutrients can affect microbial community metabolism and carbon use efficiency. Adding glucose-C increases the synthesis of other carbohydrates in soil, while adding C and N together increases peptide synthesis. The combination of C and P increases the synthesis of fatty acids. Inorganic nutrient enrichment causes significant shifts in microbial community metabolism, but the community shows significant metabolic flexibility.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Environmental Sciences
Jaron Adkins, Jessica R. Miesel
Summary: The study found that high intensity soil heating reduces soil carbon sink strength by affecting microbial anabolism, while lower intensity heating has minimal impact on microbial biomass accumulation and carbon use efficiency. Addition of pyrogenic organic matter (PyOM) to soils resulted in similar microbial biomass accumulation compared to uncharred organic matter, but lower CO2 emissions.
Article
Soil Science
Haiyang Gong, Qiajun Du, Shubin Xie, Weigang Hu, Muhammad Adnan Akram, Qingqing Hou, Longwei Dong, Ying Sun, Abdul Manan, Yan Deng, Jinzhi Ran, Jianming Deng
Summary: The study demonstrated that soil microbial DNA can serve as a powerful indicator for estimating C-mic and N-mic in arid and semiarid systems, providing convenient and efficient estimates despite the need for further improvement. Strong linear relationships were found between soil microbial DNA concentrations and C-mic/N-mic contents, although microbial biomass in soil exhibited significant fluctuation.
APPLIED SOIL ECOLOGY
(2021)
Article
Soil Science
Orly Mendoza, Stefaan De Neve, Heleen Deroo, Steven Sleutel
Summary: The addition of exogenous organic matter can stimulate microbial activity and shape soil structure, particularly at higher doses. The impact of the application dose of exogenous organic matter on its own mineralization and that of native soil organic carbon by mediating soil pore network structure is not well known.
BIOLOGY AND FERTILITY OF SOILS
(2022)
Article
Forestry
Taiki Mori, Senhao Wang, Cong Wang, Jiangming Mo, Wei Zhang
Summary: The study tested the effects of nutrient addition on microbial biomass in strongly acidified Chinese forest soils using the CFE method. The results showed that while N and P addition altered DOC and DN contents, they did not affect the MBC and MBN values determined by the CFE method.
IFOREST-BIOGEOSCIENCES AND FORESTRY
(2021)
Article
Soil Science
Xinying Zhang, Juan Jia, Litong Chen, Haiyan Chu, Jin-Sheng He, Yangjian Zhang, Xiaojuan Feng
Summary: This study provides regional-scale data on MNC accumulation in alpine grasslands of the Qinghai-Tibet Plateau, showing that the grasslands have low MNC concentrations in SOC due to high aridity and low net primary productivity. The findings highlight the influences of climate and plant factors on MNC accumulation at regional scales.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Soil Science
V. Audu, F. Rasche, L. M. Dimitrova Martensson, C. Emmerling
Summary: Compared to organic rotation systems, perennial grain agroecosystems can increase soil organic matter and microbial activities. However, a more diverse perennial grain cultivation does not lead to higher microbial biomass and activities compared to monoculture.
APPLIED SOIL ECOLOGY
(2022)
Article
Soil Science
C. Beraud, F. Piola, J. Gervaix, G. Meiffren, C. Creuze des Chatelliers, A. Delort, C. Boisselet, S. Poussineau, E. Lacroix, A. A. M. Cantarel
Summary: This study investigated the soil factors influencing the development of biological denitrification inhibition (BDI) and found that initial soil moisture, ammonium concentration, and the initial abundance of certain microbial genes play significant roles in BDI development. Additionally, the research highlighted the relevance of biotic factors in explaining BDI and proposed the use of procyanidin concentration from plant belowground system as a new proxy for measuring BDI intensity.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Yizhu Qiao, Tingting Wang, Qiwei Huang, Hanyue Guo, He Zhang, Qicheng Xu, Qirong Shen, Ning Ling
Summary: Soil microbial community coalescence, the mixing and interaction of microbial communities, has been found to enhance the stability and complexity of rhizobacterial networks, leading to improved plant health and biomass. This study investigated the effects of different degrees of bacterial community coalescence on plant disease resistance by mixing soils from healthy and diseased habitats for watermelon planting. The results showed that mixing in more healthy soil reduced the plant disease index and increased biomass by improving the stability and complexity of the rhizobacterial network. Core taxa Nitrospirillum and Singulisphaera were enriched in the rhizosphere from healthy soils and played important roles in disease suppression and regulating the positive cohesion and modularity of the networks. Overall, these findings provide insights into the potential mechanism of microbial community coalescence for improving plant microbial community function and suggest new tools for enhancing plant fitness via soil microbiota mixing.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Mengqiu He, Shending Chen, Lei Meng, Xiaoqian Dan, Wenjie Wang, Qinying Zhu, Zucong Cai, Jinbo Zhang, Pierfrancesco Nardi, Christoph Mueller
Summary: Maize genotypes directly affect gene expression and nitrogen uptake capacity. The feedback between maize genotypes and soil nitrogen transformations, as well as their regulations on nitrogen uptake capacity, have been studied. The findings suggest that maize genotypes play a central role in regulating these feedbacks, which are important for maize breeding and enhancing maize production.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Ke Shi, Jiahui Liao, Xiaoming Zou, Han Y. H. Chen, Manuel Delgado-Baquerizo, Zhengming Yan, Tingting Ren, Honghua Ruan
Summary: Through rewilding, microbial extracellular and cellular residues can continuously accumulate in soils and significantly contribute to soil organic carbon sequestration. Extracellular residues are mainly driven by fine root biomass, while cellular residues are mainly driven by soil nitrogen and organic carbon content.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Sensen Chen, Ying Teng, Yongming Luo, Eiko Kuramae, Wenjie Ren
Summary: This study comprehensively assesses the effects of NMs on the soil microbiome through a global meta-analysis. The results reveal significant negative impacts of NMs on soil microbial diversity, biomass, activity, and function. Metal NMs, especially Ag NMs, have the most pronounced negative effects on various soil microbial community metrics.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Shareen K. D. Sanders, Gerard Martinez-De Leon, Ludovico Formenti, Madhav P. Thakur
Summary: Collembolans, the diverse group of soil invertebrates, are affected by anthropogenic climate warming, which alters their diversity and density. In addition to abiotic stressors, changes in food availability, specifically the abundance of saprotrophic and mycorrhizal fungi, influence Collembola responses to climate warming. Collembolans prefer saprotrophic fungi but rely on mycorrhizal fungi when food sources are scarce. Understanding the mechanisms behind these dietary shifts in warm-dry and warm-wet soil conditions is crucial for predicting the impact of climate change on Collembola-fungal interactions.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Wimonsiri Pingthaisong, Sergey Blagodatsky, Patma Vityakon, Georg Cadisch
Summary: A study found that mixing high-C/N ratio rice straw with low-C/N ratio groundnut stover can improve the chemical composition of the input, stimulate microbial growth, decrease the loss of residue-derived carbon in the soil, and reduce native soil carbon and nitrogen consumption.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Jiachen Wang, Jie Zhao, Rong Yang, Xin Liu, Xuyuan Zhang, Wei Zhang, Xiaoyong Chen, Wende Yan, Kelin Wang
Summary: Nitrogen is vital for ecosystem productivity, restoration, and succession processes. This study found that legume intercropping was more effective than chemical nitrogen fertilizers in promoting the complexity and stability of the soil micro-food web, as it increased microbial and nematode communities and enhanced energy flow patterns.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
