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Related Concept Videos

Inorganic Nitrogen Assimilation01:22

Inorganic Nitrogen Assimilation

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Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
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Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
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Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
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Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
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Related Experiment Video

Updated: Sep 7, 2025

Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
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Nitrogen fertilization decrease soil CO2 emission in a rainfed maize field in Northeast China.

Dan Dong1,2, Weichao Yang3, Hao Sun2

  • 1Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection/Jiangsu Key Laboratory for Eco-Agriculture Biotechnology Around Hongze Lake, Huaiyin Normal University, 223300, Huai'an, China.

Environmental Science and Pollution Research International
|June 21, 2022
PubMed
Summary
This summary is machine-generated.

Nitrogen fertilizer significantly reduced soil CO2 emissions in a Chinese maize field. This finding is crucial for understanding agricultural carbon fluxes and optimizing fertilizer management for climate benefits.

Keywords:
CO2 fluxFarmland ecosystemField experimentQ10Soil respiration

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Area of Science:

  • Agricultural Science
  • Soil Science
  • Environmental Science

Background:

  • Nitrogen fertilizer's impact on soil carbon fluxes is significant but responses of soil CO2 emissions remain debated.
  • Understanding these dynamics is crucial for agricultural sustainability and climate change mitigation.

Purpose of the Study:

  • To investigate the effect of nitrogen (N) fertilizer application on soil CO2 emissions in a maize field in Northeast China.
  • To quantify the seasonal contribution to annual CO2 emissions and assess the influence of soil temperature on these fluxes.

Main Methods:

  • A field experiment was conducted from May 2010 to April 2016.
  • Soil CO2 emissions were continuously monitored.
  • Statistical analysis was performed to evaluate the impact of N fertilization and soil temperature.

Main Results:

  • Mean annual soil CO2 emissions decreased by an average of 21.2% with N fertilization.
  • Cumulative annual soil CO2 emissions were significantly higher in the no-N addition control (CK) compared to N addition (SU) treatments.
  • Soil temperature at 5 cm depth explained 49.6-82.2% of the CO2 flux variation, while N fertilizer did not significantly affect the Q10 annual scale.

Conclusions:

  • Nitrogen fertilization plays a critical role in regulating soil CO2 emissions within agricultural ecosystems.
  • The findings underscore the importance of considering N fertilizer management for mitigating greenhouse gas emissions from farmlands.