Article
Agronomy
Xiang Zheng, Qi Liu, Xinli Chen, Minmin Cao, Fan Wu, Weiyang Li, Ling Zhang, Shenglong Liu, Jiang Jiang
Summary: Arbuscular mycorrhizal fungi (AMF) play a crucial role in facilitating the uptake of soil phosphorus and nitrogen by land plants in exchange for carbon. However, the influence of AMF on soil N2O emissions under nitrogen addition remains unclear. This study found that AMF could significantly reduce soil N2O emissions by decreasing soil ammonium concentration through hyphal nitrogen uptake. AMF did not interact with nitrogen addition in affecting soil N2O emissions or N2O-producing microbes.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Environmental Sciences
Jun Wang, Wenli Cui, Zhao Che, Fei Liang, Yongkang Wen, Meimei Zhan, Xiao Dong, Wenjun Jin, Zhaorong Dong, He Song
Summary: The study found that soil acidification reduced the contribution of bacteria to N2O emissions, increased the contribution of fungi, and altered the community structures and chemical properties of the soil. The type of fertilizer significantly affected the contribution of bacteria to N2O emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Forestry
Lei Zhang, Junqiang Zheng, Xu Han, Junhui Zhang, Chengxu Li, Shicong Geng, Shijie Han
Summary: The contribution of fungi to nitrous oxide production is recognized alongside bacteria, but the response of these groups to environmental changes, nitrogen deposition, and precipitation remains uncertain. In a temperate forest in northeastern China, soil moisture and nitrogen addition were found to have significant impacts on N2O production pathways. Bacteria dominated N2O emissions in nitrogen fertilized soil, particularly under flooded conditions, while fungi played a larger role in untreated soil at lower water-filled pore spaces.
JOURNAL OF FORESTRY RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
S. Connolly, V. O'Flaherty, D. J. Krol
Summary: Cattle slurry storage is a significant contributor to global methane and ammonia emissions. A study investigated the effectiveness of an oxygen-based amendment in reducing these emissions. Various peroxide sources were tested, and an amendment consisting of hydrogen peroxide and potassium iodide was found to successfully reduce methane emissions. While other peroxide sources reduced methane emissions, they also increased pH and subsequently ammonia emissions. The hydrogen peroxide and potassium iodide amendment achieved a 63% reduction in methane emissions and should be considered for larger scale implementation.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Ecology
William A. Argiroff, Donald R. Zak, Peter T. Pellitier, Rima A. Upchurch, Julia P. Belke
Summary: The study reveals that ectomycorrhizal fungi with peroxidases decrease with increasing inorganic nitrogen availability in northern temperate forests, while ligninolytic fungal saprotrophs show no response. Soil organic matter and soil carbon are negatively correlated with ECM fungi with peroxidases and positively correlated with inorganic nitrogen availability, indicating that these ECM fungi contribute to the decay of lignin-derived soil organic matter and reduce soil carbon storage. The correlations observed suggest a tradeoff between tree nitrogen nutrition and ECM composition, influencing soil organic matter dynamics in temperate forests.
Article
Soil Science
Banira Lombardi, Sandra Loaiza, Catalina Trujillo, Ashly Arevalo, Eduardo Vazquez, Jacobo Arango, Ngonidzashe Chirinda
Summary: This study investigated the impact of two Urochloa forages with different BNI capacities on greenhouse gas emissions from cattle dung deposits. Results showed that the forage genotype influenced CO2 and CH4 emissions, but had no significant effect on N2O emissions. It suggests the need for region-specific EF studies to fully understand the implications of forage selection on GHG emissions.
Article
Agronomy
Jinmei Zhong, Yaqi Song, Man Yang, Wei Wang, Zhaohua Li, Liya Zhao, Kun Li, Ling Wang
Summary: Paddy fields are significant sources of N2O emissions due to frequent fluctuations in soil water content. The contribution of N2O uptake to the reduction in net N2O emission varies with water content and is influenced by physicochemical factors and microbial regulatory mechanisms. However, the specific impact of these factors on N2O uptake in paddy soil remains largely unknown.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Engineering, Environmental
Xiangyu Chen, Jing Yang, Raymond Jianxiong Zeng, Shuping Qin, Xing Liu, Yuzhen Zhang, Shungui Zhou, Man Chen
Summary: Reactive oxygen species (ROS) have been found to play an essential role in promoting N2O emissions in soil/sediment during the anoxic-oxic transition. ROS inhibits the rate of nitrate reduction and increases N2O emissions by inhibiting the step of N2O reduction. Hydrogen peroxide is the dominant ROS species inhibiting N2O reduction, while hydroxyl radicals have negligible effects.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Ecology
Lena Rohe, Traute-Heidi Anderson, Heinz Flessa, Anette Goeske, Dominika Lewicka-Szczebak, Nicole Wrage-Moennig, Reinhard Well
Summary: The study investigated the contribution of fungi to soil greenhouse gas emissions of N2O, finding that fungal denitrification in soil has a small impact on N2O fluxes.
Article
Environmental Sciences
Yu-Pin Lin, Andrianto Ansari, Rainer Ferdinand Wunderlich, Huu-Sheng Lur, Thanh Ngoc-Dan Cao, Hussnain Mukhtar
Summary: Understanding the niche segregation of AOA and AOB in ammonia oxidation and N2O production under different pH and temperature conditions is crucial for predicting N2O dynamics. Results showed that AOA and AOB occupied different niches for PAO, with soil temperature being a major determinant. N2O fluxes were higher in acidic conditions and lower in alkaline conditions, with a significant positive correlation between PAO and N2O fluxes.
Article
Agriculture, Dairy & Animal Science
Yuchao Zhao, Biao Xie, Jian Gao, Minmin Xiao, Guangyong Zhao
Summary: The study showed that dietary supplementation with Na2SO4 can effectively balance the dietary N/S ratio, obtain an ideal N retention rate in steers, and reduce N2O emissions from steer urine.
ANIMAL FEED SCIENCE AND TECHNOLOGY
(2021)
Article
Soil Science
Wenzhao Zhang, Hanchang Zhou, Rong Sheng, Hongling Qin, Haijun Hou, Yi Liu, Anlei Chen, Chunlan Chen, Wenxue Wei
Summary: Soil aggregates play a crucial role in regulating soil biological processes, with smaller aggregates emitting higher N2O fluxes. Different soil aggregate sizes have varying microbial community compositions and abundances under different soil moisture conditions. Soil aggregates influence N2O emissions by altering the abundance and community compositions of nitrifiers and denitrifiers.
Article
Agriculture, Dairy & Animal Science
Jian Gao, Bingbing Cheng, Yanfeng Sun, Yuchao Zhao, Guangyong Zhao
Summary: Two consecutive trials were conducted to investigate the effects of glucosinolates in rapeseed cake on nitrogen metabolism and urine nitrous oxide emissions in steers. The results showed that dietary inclusion of rapeseed cake decreased digested nitrogen and increased fecal nitrogen excretion. It also increased urine nitrous oxide emissions and had a close correlation with the excretion of thiocyanate in urine. Further research is needed to investigate the impact of other metabolites in rapeseed cake on urine nitrous oxide emissions in steers.
Article
Microbiology
Yvonne Bosch, Grace Pold, Aurelien Saghai, Magnus Karlsson, Christopher M. Jones, Sara Hallin
Summary: Fungal denitrifiers are sparse but cosmopolitan in soils, dominated by saprotrophs and pathogens. Bacterial and archaeal denitrifiers, rather than fungal denitrifiers, are the main contributors to N2O emissions.
MICROBIOLOGY SPECTRUM
(2023)
Article
Agronomy
Ziyi Feng, Yongxiang Yu, Huaiying Yao, Chaorong Ge
Summary: This study found that the presence of ZnO nanoparticles can increase N2O emissions in soil, especially when coupled with C and N substrate amendments. The action of ZnO NPs promotes nitrification and denitrification processes, further impacting the functional genes associated with N2O emissions.
Article
Ecology
Edith C. Hammer, Carlos Arellano-Caicedo, Paola Micaela Mafla-Endara, E. Toby Kiers, Tom Shimizu, Pelle Ohlsson, Kristin Aleklett
Summary: This study used microfluidic chips to investigate foraging strategies and habitat modification of Rhizophagus irregularis symbiotically associated with carrot roots. The researchers found that AMF hyphae can forage over long distances, prefer straight passages, and show branching induction when encountering obstacles. They also observed bi-directional transport of cellular content inside the hyphae and strategic allocation of biomass within the mycelium. Additionally, the AMF hyphae modified the pore-spaces in the chips by clogging them with irregularly shaped spores. These findings have important implications for understanding the impact of AMF on water retention in soils.
