相关实验视频

Updated: Jun 17, 2025

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

Published on: November 21, 2015

实验性沉积对沙漠草原土壤化学的累积影响:一项为期12年的实地研究

Jieqiong Su¹, Ying Ma², Zhihao Xu³

¹Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands and Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.

The Science of the total environment

|August 9, 2024

概括

在沙漠草原中长期沉积增加了土壤有机碳,但加剧了限制. 这项研究揭示了的含量.

科学领域:

土壤科学土壤科学
生态生态学生态生态学
环境科学环境科学

背景情况:

人类增强的大气 (N) 沉积对生态系统产生影响.
由于水文和土壤异质性,干旱土地土壤对沉积的反应尚不清楚.
沙漠草原是对环境变化的敏感生态系统.

研究的目的:

调查模拟沉积对沙漠草原土壤性质的长期影响.
了解输入对土壤碳,,和pH的影响.
探索土壤特性与营养循环之间的关系.

主要方法:

在中国的沙漠草原中,模拟了12年的沉积 (0,3.5,7,14 g N m-2 yr-1).
对土壤总N,可用的N (NH4+,NO3−),pH,CaCO3,总 (P) 和土壤有机碳 (SOC) 的分析.
皮尔森的相关性分析,以确定土壤特性和植物营养含量之间的关系.

主要成果:

在上层土壤层增加了总N和可用的N;在下层土壤层减少了可用的N和NO3−-N,这表明N漏.
降低了土壤pH值,增加了土壤上层和下层的CaCO3含量.
两层土壤有机碳 (SOC) 增加,但总 (P) 随着肥的增加而减少.
可用的土壤P与植物Mn含量负相关;SOC和CaCO3正相关,表明Ca循环参与P循环和SOC封存.

结论:

长期的沉积加剧了沙漠草原土壤中的限制.
的输入增强了这些干旱生态系统中的土壤有机碳封存.
了解这些营养动态对于管理沙漠草原生态系统在增加的沉积下至关重要.

关键词:

碳碳碳碳碳碳干旱地区是干旱地区.气气是一种气.是一种的物质.土壤土壤土壤.

更多相关视频

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

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

Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils

Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils

Published on: November 25, 2016

相关概念视频

Overview of Nitrogen Metabolism

Overview of Nitrogen Metabolism

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 Nitrogen Cycle

The Nitrogen Cycle

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...

Key Elements for Plant Nutrition

Key Elements for Plant Nutrition

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...