不同的肥率如何影响作物产量和河流N2O排放? 一个混合建模研究研究研究
Diego Panique-Casso1, Nelson F Pacheco-Bueno1, Marie Anne Eurie Forio1
1Department of Animal Sciences and Aquatic Ecology, Ghent University, Gent, Belgium.
Water research
|February 22, 2025
概括
农业头水流产生大量的氧化 (N2O). 我们的研究开发了一个模型来预测N2O排放,发现气候变化和施肥加剧了这些温室气体排放.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 水文学的水文学
背景情况:
- 农业采水区的头水流是氧化 (N2O) 的重要来源,原因是营养丰富.
- 当前的环境影响评估往往忽略了这些N2O排放,需要先进的评估和减缓决策工具.
研究的目的:
- 建立一个综合建模框架,用于预测农业源水河流系统的N2O排放.
- 评估气候变化和施肥场景对N2O排放的影响.
主要方法:
- 结合了土壤和水评估工具加 (SWAT+) 模型与线性混合模型 (LMM).
- 校准和验证SWAT+以模拟流动,营养物质运输和作物产量.
- 根据SWAT+输出和生物化学数据,使用LMM预测河流N2O排放.
主要成果:
- 确定了水文驱动的N2O排放模式,在冬季和春季达到峰值.
- 气候变化场景在更潮湿和更热的条件下增加了40%的N2O排放.
- 肥料价格的20%增加,加上气候变化,使河流N2O排放量增加了83%.
结论:
- 这些发现强调了整合陆地表面和河流过程对于准确量化N2O排放的重要性.
- 强调了河流营养丰富,气候变化和农业实践之间的反循环.
- 强调需要全面的减缓战略,以应对气候变暖对农业排放的影响.
更多相关视频
相关概念视频
The Nitrogen Cycle
51.5K
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...
51.5K
Overview of Nitrogen Metabolism
7.8K
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...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.8K
Key Elements for Plant Nutrition
18.6K
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...
18.6K
Primary Production
23.5K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.5K
Overview of Metabolism
29.4K
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.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
29.4K
Multiple Regression
2.9K
Multiple regression assesses a linear relationship between one response or dependent variable and two or more independent variables. It has many practical applications.
Farmers can use multiple regression to determine the crop yield based on more than one factor, such as water availability, fertilizer, soil properties, etc. Here, the crop yield is the response or dependent variable as it depends on the other independent variables. The analysis requires the construction of a scatter plot...
Farmers can use multiple regression to determine the crop yield based on more than one factor, such as water availability, fertilizer, soil properties, etc. Here, the crop yield is the response or dependent variable as it depends on the other independent variables. The analysis requires the construction of a scatter plot...
2.9K


