Article
Soil Science
M. Halder, S. Liu, Z. B. Zhang, Z. C. Guo, X. H. Peng
Summary: Organic materials play a crucial role in soil aggregate formation and turnover processes. The study found that the addition of organic materials can significantly reduce aggregate turnover time, with different effects on various aggregate fractions. Nutrient stoichiometry, biochemical features, and carbon functional groups impact aggregate formation but have minimal effects on the turnover time of soil aggregates.
Article
Soil Science
S. Liu, J. Six, H. X. Zhang, Z. B. Zhang, X. H. Peng
Summary: The formation, stabilization, and breakdown of soil aggregates play a crucial role in the sequestration of soil organic carbon (SOC). This study reveals that residue addition decreases the turnover time of soil aggregates and affects the transfer rate between different types of aggregates. The interactions between SOC changes and soil aggregate dynamics are further influenced by residue features and soil texture.
Article
Environmental Sciences
Bin Wang, Tingqian Shan, Junjie Wang, Fuyang Huang, Wei Liu, Weiguo Tu, Sen Li, Qingsong Chen
Summary: This study investigates the source and degradation of soil organic matter on China's Zoige Plateau, identifying lignin as the main source and tracing its distribution and turnover. Lignin primarily comes from non-woody angiosperm tissues, with litter and roots contributing to topsoil and vertical migration to deep soil. Meadow soil exhibits faster organic matter degradation compared to bog soil.
Article
Soil Science
Frederic Leuther, Robert Mikutta, Maximilian Wolff, Klaus Kaiser, Steffen Schlueter
Summary: Soil structure refers to the temporal changes in the spatial arrangement of pores, organic matter, and minerals. The turnover of soil structure plays a crucial role in carbon storage and is mainly determined by macrofaunal activity, which varies with environmental conditions. Under dry conditions, the structure turnover time was estimated to be 33+/-3 years, while under moist conditions it was 16+/-1 years.
Article
Agronomy
Mariko Ingold, Christine Wachendorf, Andreas Buerkert
Summary: The study showed that Quebracho tannin-enriched manure can reduce CO2 and N2O emissions, help prevent N leaching, but may increase greenhouse gas emissions, indicating the potential of tannin-enriched manure for soil management and environmental protection.
JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE
(2021)
Article
Ecology
Juan Jia, Zongguang Liu, Negar Haghipour, Lukas Wacker, Hailong Zhang, Carlos A. Sierra, Tian Ma, Yiyun Wang, Litong Chen, Ao Luo, Zhiheng Wang, Jin-Sheng He, Meixun Zhao, Timothy I. Eglinton, Xiaojuan Feng
Summary: Climate projection requires accurate understanding of SOC decomposition and its response to warming. This study provides direct evidence of the rapid turnover of lignin-derived phenols compared to slower-cycling components of SOC, and reveals that temperature mainly regulates lignin turnover while slow-cycling components are strongly influenced by mineral association. These findings suggest that warming may greatly accelerate lignin decomposition, especially in soils with weak mineral associations.
Article
Engineering, Civil
Yize Sun, Xiaodong Nie, Zhongwu Li, Shilan Wang, Jia Chen, Fengwei Ran
Summary: This study evaluated the suitability of three commonly-used tracers techniques for tracing organic matter sources under different mixed end-members. Bulk stable isotopes were considered the most suitable tracer for terrestrial organic matter sources tracing, while fluorescent indices were found to be unsuitable for this purpose.
JOURNAL OF HYDROLOGY
(2021)
Article
Soil Science
S. Liu, Z. C. Guo, M. Halder, H. X. Zhang, J. Six, X. H. Peng
Summary: This study found that the incorporation of organic residues increased the formation of macroaggregates and decreased their breakdown, leading to larger standardized MWD in higher-quality residue-incorporated soils, except for Basalt soil. Additionally, microbial activity significantly influenced soil aggregation dynamics, along with the newly formed large macroaggregates.
Article
Agronomy
Benchuan Zheng, Ping Chen, Qing Du, Huan Yang, Kai Luo, Xiaochun Wang, Feng Yang, Taiwen Yong, Wenyu Yang
Summary: This study found that straw incorporation and nitrogen input can improve soil organic matter content, soil macroaggregate stability, and microbial diversity. In the wheat-maize-soybean relay strip intercropping system, SI+N30 was shown to be the most effective way to maintain soil fertility and reduce nitrogen fertilizer use.
Article
Geosciences, Multidisciplinary
Zhiyuan Yao, Qian Xu, Yupei Chen, Na Liu, Yangyang Li, Suiqi Zhang, Weidong Cao, Bingnian Zhai, Zhaohui Wang, Dabin Zhang, Sina Adl, Yajun Gao
Summary: The study investigated the impact of introducing leguminous green manure to replace summer fallow on nitrogen distribution in soil and organic matter fractions. It found that leguminous green manure mainly expands the soil organic nitrogen pool by regulating the nitrogen content of coarse particulate organic matter and intra-microaggregate organic matter.
Article
Soil Science
Manuel Vergara Sosa, Eva Lehndorff, Andrei Rodionov, Martina Gocke, Alexandra Sandhage-Hofmann, Wulf Amelung
Summary: A novel C-free embedding method using silica gel was introduced for water glass formation, allowing for delta C-13 and C turnover analyses in soil aggregates. Micro-scale heterogeneity in delta C-13 signals within aggregates was observed, increasing with cropping duration. This successful embedding technique enables future micro-scale C dynamic analyses in environmental samples.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Engineering, Environmental
Mouliang Xiao, Ji'na Ding, Yu Luo, Haoqing Zhang, Yongxiang Yu, Huaiying Yao, Zhenke Zhu, David R. Chadwick, Davey Jones, Jianping Chen, Tida Ge
Summary: Microplastics can impact microbial communities and carbon cycling in agricultural soils. This study investigates the effects of microplastics on the decomposition of soil organic matter and bacterial community succession. The results show that microplastics initially reduce CO2 efflux but subsequently promote it, possibly due to enhanced enzyme activities and shifts in bacterial diversity.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Geosciences, Multidisciplinary
Lingbo Dong, Jiwei Li, Yulin Liu, Xuying Hai, Miaoyu Li, Jianzhao Wu, Xiaozhen Wang, Zhouping Shangguan, Zhengchao Zhou, Lei Deng
Summary: The study compared soil C and N sequestration between artificial forests and natural grasslands converted from sloping cropland in the Central Loess Plateau, China, over 20 years post-implementation of the Grain for Green Program. The results showed that both vegetation restoration types significantly increased the soil organic carbon and nitrogen content in the top 60 cm of soil, with artificial forests having higher sequestration capacities. Soil aggregate stability and the quality of input organic matter were found to be crucial in affecting soil C and N sequestration post-restoration, with N fixing species enhancing sequestration.
Article
Agriculture, Multidisciplinary
Manbir Rakkar, Jacob M. Jungers, Craig Sheaffer, Galen Bergquist, Julie Grossman, Fucui Li, Jessica L. M. Gutknecht
Summary: Organic crop production is a growing sector in agriculture, but transitioning from conventional to organic cropping systems is challenging for growers. This study evaluated the impact of different perennial and annual cropping systems on soil health during a three-year organic transition period in Minnesota. The results showed that IWG and IWGAlfalfa systems had positive effects on root biomass and soil aggregates, while SoyCorn systems performed the poorest. Other soil health variables had site-specific responses, and IWGAlfalfa increased microbial biomass at one site. The findings suggest that IWG and IWGAlfalfa could contribute to long-term soil health in subsequent organic crops, but more time may be needed for other important soil health parameters.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Environmental Sciences
Yun Liang, Anika Lehmann, Gaowen Yang, Eva F. Leifheit, Matthias C. Rillig
Summary: The study found that the effects of microplastic fibers on soil aggregation and enzyme activities are dependent on the presence of organic matter. The addition of Plantago and wheat straw increased aggregation and enzyme activities, while microplastic fibers present decreased these effects.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)