Article
Geosciences, Multidisciplinary
Xiaojuan Li, Tinghui Yang, Lettice C. Hicks, Bin Hu, Xin Liu, Dandan Wei, Zilong Wang, Weikai Bao
Summary: The variation of organic matter fractions in arid and semi-arid regions along latitudinal gradients is influenced by climate and soil physicochemical factors.
Article
Soil Science
Anna M. Cates, Andrea Jilling, Malak M. Tfaily, Randall D. Jackson
Summary: Understanding the effects of temperature and moisture treatments on the composition of soil organic carbon is important for C and climate change modeling. This study analyzed the chemical composition of different aggregate fractions under different temperature and moisture treatments. The results showed that the composition of organic matter varied among different fractions, and both temperature and moisture had significant effects on the abundance of different carbon compounds. Moisture had the most pronounced effect on the composition of carbon within aggregates, while temperature had a stronger influence on carbon content in the silt and clay fractions.
Article
Soil Science
Yansheng Li, Zhihuang Xie, Zhenhua Yu, Yanhong Wang, Changkai Liu, Guanghua Wang, Junjiang Wu, Jian Jin, Xiaobing Liu
Summary: The application of cattle manure significantly increases soil organic carbon storage, particularly in the top layer of soil. It also impacts microbial biomass and dissolved organic carbon concentrations, positively influencing soil fertility.
SOIL & TILLAGE RESEARCH
(2021)
Article
Soil Science
Helen C. S. Amorim, Luis C. C. Hurtarte, Ivan F. Souza, Yuri L. Zinn
Summary: C:N ratios are widely used as indicators for the chemical composition and quality of soil organic matter, but their response to environmental factors is still poorly understood. This study collected data from 74 studies conducted between 1980 and 2019, covering a wide range of environmental settings, and found that soil organic carbon and total nitrogen contents were mainly controlled by macroscale climatic drivers, while soil C:N ratios were more responsive to microscale factors such as soil particle-size distribution.
Review
Biodiversity Conservation
Axel Don, Felix Seidel, Jens Leifeld, Thomas Katterer, Manuel Martin, Sylvain Pellerin, David Emde, Daria Seitz, Claire Chenu
Summary: Carbon sequestration is the removal of carbon from the atmosphere and storage in soils, which is important for mitigating climate change. However, the term is often used misleadingly, leading to exaggerated expectations. While soils have the potential to absorb carbon, many are experiencing continuous loss, highlighting the need for accurate terminology to distinguish different processes.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Plant Sciences
Samrat Ghosh, Dinesh K. Benbi, O. P. Chaudhary
Summary: This study investigated the impact of cropping systems on soil organic carbon dynamics in different soils with varying antecedent C levels. The results showed that the maize-wheat and soybean-wheat cropping systems can promote soil carbon sequestration in soils with antecedent C levels below 36 Mg ha(-1).
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Forestry
Yi-Han Lin, Pei-Chen Lee, Oleg Menyailo, Chih-Hsin Cheng
Summary: The study found that the afforestation or abandonment of agricultural fields to forest regeneration led to increases in soil organic carbon concentrations and stocks. The average annual sequestration rate was higher than previously observed, highlighting the potential of this method as a promising carbon offset mechanism. Additionally, factors such as climate, soil depth, regeneration period, and tree species played a role in influencing the levels of SOC accumulation.
Article
Soil Science
Ignacio Macedo, M. Virginia Pravia, Jesus Castillo, Jose A. Terra
Summary: Research on the impact on soil quality suggests that crop-pasture rotations can maintain soil organic carbon content in the midterm, but substituting perennial pastures with other crops may lead to a reduction in particulate organic matter fractions.
SOIL & TILLAGE RESEARCH
(2021)
Article
Environmental Sciences
Wenjun Xie, Pengshuai Shao, Yanpeng Zhang, Shoucai Wei, Jianan Li, Yingjie Sun, Huawei Zhang
Summary: The composition and distribution of organic matter in saline soil are largely unknown. A field experiment was conducted to investigate the effects of straw and nitrogen addition on soil organic matter characteristics. The results showed that the addition of straw and nitrogen significantly increased soil organic matter content and amino sugar contents.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Environmental Sciences
Manuel Garcia-Jaramillo, Kylie M. Meyer, Claire L. Phillips, Veronica Acosta-Martinez, James Osborne, Alexander D. Levin, Kristin M. Trippe
Summary: The study showed that addition of biochar modified the chemical and physical composition of soils, increasing the bioavailability of carbon and nitrogen, but did not have significant effects on plant physiology parameters and productivity. However, a gradual decrease in wine tannins was observed in wines produced from grapes treated with biochar. Long-term field experiments are still needed to fully assess the impact of biochar on soil properties, vine physiology, productivity, and grape and wine quality.
Article
Soil Science
Batande Sinovuyo Ndzelu, Sen Dou, Xiaowei Zhang, Yifeng Zhang
Summary: Corn straw is a significant source of carbon that can alter the accumulation and distribution of organic carbon in soil. This study investigated the chemistry of organic matter in different density fractions of soil treated with corn straw under different tillage practices. The results showed that adding corn straw increased soil organic carbon content compared to conventional tillage without straw return.
Article
Biodiversity Conservation
Juan Carlos Quezada, Thomas Guillaume, Christopher Poeplau, Jaboury Ghazoul, Alexandre Buttler
Summary: This study found that the variability of soil biogeochemical properties within oil palm plantations explained almost five times more than the changes in savanna land-use. Conversion of clayey-soil savanna into oil palm increased the total ecosystem carbon stocks and application of organic residues in management zones enhanced soil organic carbon accumulation. Organic matter-oriented management strategies can improve carbon sink capacity in oil palm agroecosystems and promote soil microbial functioning. However, the conservation of natural savannas should be prioritized due to their uniqueness and threatened biodiversity.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Lipeng Wu, Shirong Zhang, Ronghui Ma, Mengmeng Chen, Wenliang Wei, Xiaodong Ding
Summary: Organic amendments significantly increased soil organic C stock in saline paddy fields, with biochar treatment showing the highest increase. However, rice straw and organic fertilizer were found to be more effective in improving soil aggregate stability compared to biochar. This research highlights the importance of organic amendments in enhancing soil quality and carbon sequestration in saline-alkaline soils.
Review
Forestry
Cindy E. Prescott, Lars Vesterdal
Summary: Recent advancements in the study of litter decomposition and soil organic matter formation in forests have highlighted the significant role of microbial transformation of slow-cycling soil organic matter. The provision of nitrogen during late-stage decomposition may actually promote the accumulation of microbial biomass and necromass, affecting the measurement of litter decomposition rates. It is crucial to consider both plant material decomposition and microbial transformation products accumulation to fully understand decomposition processes in forest ecosystems.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Soil Science
Livia Urbanski, Karsten Kalbitz, Janet Rethemeyer, Peter Schad, Ingrid Koegel-Knabner
Summary: This study focuses on the high organic carbon accumulation in sandy agricultural soils, specifically Plaggic Anthrosols, and finds that these soils have similar levels of OC concentration, radiocarbon ages, and organic matter composition compared to reference soils. It also reveals that a significant portion of soil OC is contained within the <=20 μm fraction, despite its low mass proportion. These findings indicate the presence of specific processes for organic matter accumulation in sandy agricultural soils.
