Results 31 to 40 of about 461,590 (157)

Optimizing the Nitrogen Use Efficiency in Vegetable Crops

Nitrogen
Nitrogen (N) is the most limiting nutrient for the production of vegetable crops, but anthropogenic sources pose risks due to its transformation into several reactive forms and movement throughout the environment.
Hector Valenzuela
doaj   +1 more source

A case for addressing the unresolved role of permeable shelf sediments in ocean denitrification

Limnology and Oceanography Letters, 2022
The marine nitrogen cycle is a main driver of ocean productivity and affects global climate. Despite decades of study, we still have an incomplete understanding of the role of the marine nitrogen cycle in the Earth system.
Emily J. Chua, Markus Huettel, Katja Fennel, Robinson W. Fulweiler   +3 more
doaj   +1 more source

Fractionating proteins with nitrite-reducing activity in “Candidatus Kuenenia stuttgartiensis” strain CSTR1

Frontiers in Microbiology
The anammox bacteria “Candidatus Kuenenia stuttgartiensis” (Ca. Kuenenia) are able to gain energy by combining ammonium and nitrite to produce nitrogen gas, which is an ecologically and technically significant activity process.
Emea Okorafor Ude, Pranathi Sure, Rimjhim Rimjhim, Lorenz Adrian, Lorenz Adrian, Chang Ding   +5 more
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Amonio en sistemas acuáticos

EDIS
De todos los parámetros de calidad de agua que afectana los peces, el amonio es el más importante después del oxígeno, especialmente en sistemas de cultivo intensivo.
Ruth Francis-Floyd, Craig Watson, Denise Petty, Deborah B. Pouder, Leonardo Ibarra-Castro   +4 more
doaj   +1 more source

Transboundary Impacts of NO₂ on Soil Nitrogen Fixation and Their Effects on Crop Yields in China

Agriculture
Nitrogen dioxide (NO2) impacts climate, air quality, soil nitrogen fixation, and crop production, yet its transboundary impacts remain unclear. This study combines 15 global datasets to assess nitrogen’s transboundary impacts on crop yields and soil ...
Jinhui Xie, Peiheng Yu, Xiangzheng Deng
doaj   +1 more source

Reconstructing continental‐scale variation in soil δ15N: a machine learning approach in South America

Ecosphere, 2020
Soil nitrogen isotope composition (δ15N) is an essential tool for investigating ecosystem nitrogen balances, plant–microbe interactions, ecological niches, animal migration, food origins, and forensics. The advancement of these applications is limited by
João Paulo Sena‐Souza, Benjamin Z. Houlton, Luiz Antônio Martinelli, Gabriela Bielefeld Nardoto   +3 more
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Response Characteristics and Community Assembly Mechanisms of nirS-Type Denitrifiers in the Alpine Wetland under Simulated Precipitation Conditions

Biology
The nitrogen cycling process in alpine wetlands is profoundly affected by precipitation changes, yet the dynamic response mechanism of denitrifiers to long-term precipitation shifts in the alpine wetland of the Qinghai-Tibet Plateau remains enigmatic ...
Ni Zhang, Kelong Chen, Ji Chen, Wei Ji, Ziwei Yang, Zhirong Chen   +5 more
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Fixed-Nitrogen Loss Associated with Sinking Zooplankton Carcasses in a Coastal Oxygen Minimum Zone (Golfo Dulce, Costa Rica)

Frontiers in Marine Science, 2017
Oxygen minimum zones (OMZs) in the ocean are of key importance for pelagic fixed-nitrogen loss (N-loss) through microbial denitrification and anaerobic ammonium oxidation (anammox). Recent studies document that zooplankton is surprisingly abundant in and
Peter Stief, Ann Sofie B. Lundgaard, Álvaro Morales-Ramírez, Bo Thamdrup, Ronnie N. Glud, Ronnie N. Glud, Ronnie N. Glud   +6 more
doaj   +1 more source

Metabolic Network Analysis Reveals Human Impact on Urban Nitrogen Cycles

Land
Human interactions have led to the emergence of a higher complexity of urban metabolic networks; hence, traditional natural- or agriculture-oriented biogeochemical models might not be transferred well to urban environments.
Yong Min, Hong Li, Ying Ge, Jie Chang
doaj   +1 more source

The microbial nitrogen cycle [PDF]

Environmental Microbiology, 2008
Summary This special issue highlights several recent discoveries in the microbial nitrogen cycle including the diversity of nitrogen‐fixing bacteria in special habitats, distribution and contribution of aerobic ammonium oxidation by bacteria and crenarchaea in various aquatic and terrestrial ecosystems, regulation of metabolism in ...
openaire   +2 more sources