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関連する概念動画

Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

12.5K
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.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
12.5K
The Nitrogen Cycle01:49

The Nitrogen Cycle

61.4K
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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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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Sustainable Development01:43

Sustainable Development

15.5K
As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
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Key Elements for Plant Nutrition02:35

Key Elements for Plant Nutrition

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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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Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

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Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
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関連する実験動画

Updated: Mar 29, 2026

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
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Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Published on: May 10, 2020

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持続可能な開発のための窒素の管理

Xin Zhang1,2, Eric A Davidson3, Denise L Mauzerall1,4

  • 1Woodrow Wilson School of Public and International Affairs, Princeton University, Princeton, New Jersey 08544, USA.

Nature
|November 24, 2015
PubMed
まとめ

農業における窒素使用効率の向上は,世界の食糧安全保障と環境の持続可能性の鍵です. この研究では,過去のNUEパターンを分析し,持続可能な開発目標を支援しながら,将来の食糧需要を満たすための地域目標を提案しています.

さらに関連する動画

Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
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Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers

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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Published on: October 7, 2020

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関連する実験動画

Last Updated: Mar 29, 2026

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
08:44

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Published on: May 10, 2020

7.4K
Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
10:29

Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers

Published on: March 21, 2016

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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
08:05

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

Published on: October 7, 2020

6.7K

科学分野:

  • 農業科学
  • 環境科学
  • 社会経済学

背景:

  • 農作物生産における窒素使用効率の向上は,食糧安全保障と環境への影響の軽減に不可欠です.
  • 技術的な進歩だけでは不十分であり,社会経済的な要因がNUEに大きく影響し,より深い理解が必要である.

研究 の 目的:

  • 農業における窒素使用効率の歴史的動向を,様々な国々の文脈で検討する.
  • 2050年までの地域と作物の固有の窒素使用目標を提案する.
  • 持続可能な農業を実現するための社会経済政策と技術革新を特定する.

主な方法:

  • 過去の窒素使用パターンと農業開発アプローチの分析
  • 農業開発と汚染制御のための国家戦略の検討
  • 将来の需要と持続可能性の目標を予測するための窒素使用シナリオのモデル化

主要な成果:

  • 国の農業開発戦略とそれに伴う窒素汚染レベルには大きな違いがある.
  • 異なる地理的地域と作物の種類について,データに基づいた窒素使用目標が提案されています.
  • 主要な社会経済政策と技術革新が重要な要素として挙げられる.

結論:

  • 2050年の食糧安全保障と持続可能な開発目標を達成するには,技術と社会経済的要因の両方を扱う統合されたアプローチが必要です.
  • ナイロゲン利用の最適化には 地域や作物特有の戦略が不可欠です
  • 政策の介入とイノベーションは,NUEを強化し,世界的に持続可能な農業を確保するために不可欠です.