Article
Microbiology
Pengfei Sun, Yin Chen, Junzhuo Liu, Ying Xu, Lei Zhou, Yonghong Wu
Summary: Based on a national-scale field investigation in China, the nitrogen accumulation potential of periphytic biofilms decreases with increasing latitude and longitude. The nitrogen cycling pathways suggest that soil nitrogen and N-2 are two potential sources for nitrogen accumulation, while some of the accumulated nitrogen may be lost through emissions. Periphytic biofilms are beneficial for enhancing nitrogen content in paddy fields, but they also accelerate greenhouse gas emissions.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Soil Science
Yanhui Zhao, Xiong Xiong, Chenxi Wu
Summary: Different fertilization methods affect the development of periphytic biofilms in paddy fields, which in turn influences nitrogen cycling. Periphytic biofilms impact pH and dissolved oxygen levels in overlying water in paddy systems.
Article
Agronomy
Mehdi Beheshti, Hossein Ali Alikhani, Ahmad Ali Pourbabaee, Hassan Etesami, Hadi Asadi Rahmani, Mostafa Norouzi
Summary: Periphytic biofilm is a complex mixture of various microorganisms that assimilate and store phosphorus, with phosphate-solubilizing bacteria and fungi playing a role in releasing occluded phosphorus for rice plants. Different bacterial and fungal isolates have varying abilities to solubilize different phosphate sources, with consortia showing better results due to the diversity in organic acid production. Effective phosphate-solubilizing microorganisms from periphytic biofilms can potentially be used as microbial inoculants for sustainable rice cultivation in paddy lands.
Article
Biotechnology & Applied Microbiology
Jianchao Zhang, Jing Su, Chao Ma, Xiangyu Hu, Henry H. Teng
Summary: Periphyton is abundant in shallow-water ecosystems such as paddy fields and plays a crucial role in regulating local phosphorus cycling. This study explores the mechanisms of periphyton's response to environmental phosphate variability, revealing bacterial genera capable of polyphosphate transformation under stressed phosphorus conditions and biochemical processes such as sulfur-containing lipids substitution. The findings suggest that periphyton may assist rice plants in overcoming phosphorus limitations in natural environments, shedding light on potential improvements in phosphorus management strategies for rice farms.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Environmental Sciences
Caroline Doose, Soizic Morin, Laura Malbezin, Jacky Vedrenne, Claude Fortin
Summary: This study investigates the effects of Th on microbial communities of periphytic biofilms. The presence of Th modified the diatom and bacterial community structures, reducing diversity and increasing cell density. The changes in diatom and bacterial communities could explain the higher number of individual diatoms and micromeiofauna observed in Th-exposed conditions.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Engineering, Environmental
Frances C. Pick, Katherine E. Fish, Joby B. Boxall
Summary: The study introduces a new conceptual model to understand the impact of assimilable organic carbon (AOC) on drinking water biofilms and water quality. Experiment results show that biofilms formed under high AOC conditions exhibit significant discoloration and turbidity responses, potentially causing regulatory failures and water quality issues.
Review
Engineering, Environmental
Yining Gao, Hui Tong, Zhipeng Zhao, Ning Cheng, Pan Wu
Summary: Cadmium (Cd) contamination of soils, especially in paddy soils, is a global problem. Fe oxides, as a key fraction of paddy soils, play a significant role in influencing the environmental behavior of Cd. This paper summarized the impact of Fe oxides on Cd activity during transformation, the difference in Cd activity between flooded and drainage periods, the relationship between Fe plaque and plant Fe2+ nutritional status, and the influence of physicochemical properties of paddy soils on the interaction between Fe oxides and Cd.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Ronley C. Canatoy, Seung Tak Jeong, Song Rae Cho, Snowie Jane C. Galgo, Pil Joo Kim
Summary: Biochar, made up of recalcitrant carbon compounds, is considered a negative emission technology due to its indirect removal of atmospheric CO2. However, its effectiveness as a negative emission technology is challenged when organic amendment application in rice paddy leads to significant emissions of greenhouse gases, especially methane. In this study, biochar application was found to decrease annual methane emissions by 55% and nitrous oxide (N2O) emissions by 31% compared to compost. Soil organic carbon stock was significantly increased by biochar application, resulting in a net global warming potential (GWP) of -0.104 to -0.191 Mg CO2-eq ha-1. Despite similar grain yields, compost application had a significantly higher greenhouse gas intensity compared to biochar application. Overall, biochar application shows promise in maintaining soil quality and productivity without contributing to greenhouse gas emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Danyu Huang, Ning Chen, Yuan Lin, Chenghao Ge, Xiaolei Wang, Dixiang Wang, Changyin Zhu, Guodong Fang, Dongmei Zhou
Summary: This study found that carbon materials have significant effects on the cycling of iron and the production of hydroxyl radicals in paddy soils. Under anoxic conditions, carbon materials facilitate the reduction of trivalent iron in soils, while under oxygenation, they promote the oxidation of active divalent iron, resulting in higher yield of hydroxyl radicals. This provides a new insight for remediation strategies in agricultural fields contaminated with organic pollutants.
Article
Soil Science
Jiayu Deng, Yanling Deng, Zaijin Sun, Gang Wang, Linlin Cao, Hongfang Yuan, Dongyan Huang, Honglei Jia
Summary: Farmland management, specifically conventional tillage with residue removal, was found to be more effective in reducing growing-season soil respiration compared to other treatments. This was attributed to the increase in soil microbial abundance.
SOIL & TILLAGE RESEARCH
(2022)
Review
Environmental Sciences
Minkyoung Kim, Jeomshik Hwang, Guebuem Kim, Taehee Na, Tae-Hoon Kim, Jung-Ho Hyun
Summary: This paper summarizes the current understanding of carbon cycling in the East Sea, with a focus on the Ulleung Basin. The East Sea exhibits notable features in carbon cycling, such as higher primary productivity and export/production ratio compared to the adjacent Pacific, and vulnerability to acidification in the deep waters. Temporal trends observed over the past few decades provide valuable insights into slower processes in the oceans.
FRONTIERS IN MARINE SCIENCE
(2022)
Review
Engineering, Environmental
Shazreen Natasha Mohd Nizam, Nurul Syuhada Haji Baharudin, Harlina Ahmad
Summary: Pesticides are widely used in rice crops to control insects, weeds, and fungal and bacterial pathogens. They are classified based on their chemical compositions, but a comprehensive understanding of their specific effects in paddy fields is lacking. This study assessed pesticide innovation from 1945 to 2021 to better understand their utilization over time.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Agronomy
Tiecheng Li, Tangzhe Nie, Peng Chen, Zuohe Zhang, Jiaxin Lan, Zhongxue Zhang, Zhijuan Qi, Yu Han, Lili Jiang
Summary: This study quantified the carbon budget and global warming potential in paddy fields after implementing water-saving irrigation in Northeast China. The results showed that intermittent irrigation enhanced carbon sequestration capacity and significantly reduced global warming potential.
Review
Environmental Sciences
Haowei Wu, Huiling Cui, Chenxi Fu, Ran Li, Fengyuan Qi, Zhelun Liu, Guang Yang, Keqing Xiao, Min Qiao
Summary: Soil microorganisms play a crucial role in carbon cycling within soil systems by participating in the decomposition and transformation of organic matter. Investigating the processes, mechanisms, and driving factors of soil microbial carbon cycling is crucial for understanding the functionality of terrestrial carbon sinks and effectively addressing climate change.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Agronomy
F. Asch, K. Johnson, T. B. T. Vo, B. O. Sander, V. N. Duong, R. Wassmann
Summary: Choosing suitable rice varieties can reduce methane emissions and water use in paddy fields. However, reducing methane emissions during rainy seasons is challenging, and using low-emitting varieties may affect farmers' income. Field trials in Vietnam examine the potential methane savings through varietal choice and explore options for compensating farmers' mitigation efforts.
JOURNAL OF AGRONOMY AND CROP SCIENCE
(2023)
