的添加限制了关键的土壤生态酶和营养素,通过减少微生物的丰富性和多样性来限制土壤生态酶和营养素
Xiaodong Li1, Lianbo Su2, Ming Jing3
1College of Ecology and Environment, Southwest Forestry University, Kunming, 650224, Yunnan, China.
Scientific reports
|February 14, 2025
概括
在亚热带森林中,添加减少了土壤微生物的多样性,改变了酶活动. 细菌与酶相关,而真菌与营养物质相关,这表明它们在森林生态系统中的作用是互补的.
科学领域:
- 森林生态 森林生态
- 土壤微生物学 土壤微生物学
- 生物地质化学生物地质化学
背景情况:
- 微生物对森林生态系统的功能至关重要,包括土壤酶分泌和营养循环.
- 这些微生物过程对于理解生态系统对 (N) 沉积的反应至关重要.
- 亚热带森林对环境变化很敏感,这使得它们成为关键的研究系统.
研究的目的:
- 研究不同 (N) 添加水平对土壤微生物群落结构和多样性的影响.
- 评估添加对土壤生态酶活动和营养含量的影响.
- 探索土壤微生物,酶活性和亚热带森林中营养循环之间的关系.
主要方法:
- 在一个亚热带常青大叶森林中,进行了三种治疗水平 (低,中,高) 的N添加实验.
- 分析了土壤样本的微生物社区结构,多样性,生态酶活动 (逆转酶,尿酶,酸酶,催化酶) 和营养含量 (SOC,TN,TP,TK,NO3-N,NH4+-N).
- 使用同线性网络分析来检查土壤微生物群体之间的相互作用及其与酶和营养素的相关性.
主要成果:
- 添加降低了土壤细菌和真菌的多样性,细菌的多样性高于真菌.
- 像反转酶,尿素酶和酸酸酶这样的酶活动被抑制,而在N添加下,catalase活动增加.
- 土壤有机碳,总和总随着增加的增加而减少,而和/酸增加.
结论:
- 土壤细菌与生态酶活动有很强的相关性,而土壤真菌与营养含量有更强的相关性.
- 不同的微生物群体对N添加有不同的反应,突出了它们在营养循环中的特定作用.
- 细菌和真菌在酶分泌和营养物质调解中表现出互补的作用,影响森林生态系统对沉积的弹性.
更多相关视频
08:05Measurement 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
6.0K
10:31Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments
Published on: July 24, 2018
54.5K
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
The Roles of Bacteria and Fungi in Plant Nutrition
34.9K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
34.9K
The Soil Ecosystem
19.6K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
19.6K
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
Bioremediation
18.1K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.1K
