Effects of soil fauna on soil carbon mineralization

The effect of soil fauna on soil carbon mineralization is the effect of soil organisms on the refractory nature of organic carbon, and the effects of soil organisms on plant communities are likely to change the refractory properties of plant litter, roots and sediments at different temporal and spatial scales. Soil organisms can directly affect the refractory degradation of organic carbon, and a large proportion of soil stability organic carbon is directly related to microorganisms and soil invertebrates

Soil organisms contribute greatly to the maintenance of organic carbon stability. Soil organisms can release elements that promote plant growth, and after decomposition, improve the turnover of carbon in the soil. At the same time, the mineralization rate and stabilization process of organic matter are accelerated.

Effects of soil organisms on the refractory nature of organic carbon. The effects of soil fauna on plant communities are likely to change the refractory properties of plant litter and root and sediment at different spatial and temporal scales.

1.Soil organisms can directly affect the refractory degradability of organic carbon.

2.Soil stability has a large proportion of organic carbon directly**.

Effects of soil organisms on soil organic carbon stability.

1 Effects of soil organisms on the self-degradability of organic carbon.

The effects of organisms on plant communities are likely to alter the refractory properties of plant litters, roots and sediments at different spatial and temporal scales.

Soil organisms can directly affect the refractory degradability of organic carbon.

A large proportion of soil stabilized organic carbon is directly attributable to microorganisms and soil invertebrates, and evidence suggests that microbiotic recombination plays an important role in stabilizing organic carbon formation.

1 Effects of soil organisms on the self-degradability of organic carbon.

The effects of organisms on plant communities are likely to alter the refractory properties of plant litters, roots and sediments at different spatial and temporal scales.

Soil organisms can directly affect the refractory degradability of organic carbon.

A large proportion of soil stabilized organic carbon is directly attributable to microorganisms and soil invertebrates, with evidence suggesting microbiogenesis.

In the process of their life activities, soil animals strongly break and decompose soil organic matter, transforming it into objects that are easy for plants to use or mineralize.

Summary. 1.It is necessary to carry out differentiated research in combination with the layout of national grain production functional zones and important agricultural product production protection areas, analyze the benefits of carbon sequestration in different regions and different crops, and guide farmers to plant crops that increase carbon sinks after taking into account various factors such as national food security, carbon neutrality, and ecosystem functions.

How to reduce the mineralization and decomposition of soil organic carbon.

1.It is necessary to carry out differentiated research in combination with the layout of national grain production functional zones and important agricultural product production protection areas, analyze the benefits of carbon sequestration in different regions and different crops, and guide farmers to plant crops that increase carbon sinks after taking into account various factors such as national food security, carbon neutrality, and ecosystem functions.

2.Optimize the layout of planting areas and breeding areas, improve the level of pollutants absorbed by livestock and poultry breeding in the planting industry, and expand the coverage of ecological planting and breeding and cultivated land.

3.Learn from the experience of developed countries such as the United States and Japan, conduct in-depth research on the relationship between carbon dioxide and crop yield, especially vegetable greenhouse yield, build a bridge between carbon dioxide and vegetable greenhouses, actively promote urban and rural carbon sink trading, increase crop yield, and improve the level of carbon sequestration in suburban cultivated land.

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Summary. The construction of high-standard farmland should be closely integrated with moderate-scale operation, the transformation of low- and medium-yield farmland, the promotion of agricultural mechanization, and water-saving irrigation, and the overall promotion should be made to stabilize and increase grain yields. Vigorously promote the application of organic fertilizers and soil testing and formula fertilization, carry out research and development of efficient utilization and fertilizer saving technologies, improve the quality of cultivated land, minimize the use of chemical fertilizers and pesticides, and reduce carbon input.

Develop and promote low-tillage and no-tillage cultivation technology to reduce carbon emissions in the process of tillage, and reduce the mineralization and decomposition of soil organic carbon. Actively develop "low input, high output, low emission" ecological cycle carbon sequestration agriculture, encourage straw returning to the field, reduce environmental pollution, transfer fixed carbon into cultivated land, increase soil organic matter, and reduce carbon emissions. In areas with weak resource and environmental carrying capacity and high cultivated land use intensity, establish and improve the cultivated land fallow rotation system to stabilize the quality of cultivated land and improve the carbon sequestration capacity of cultivated land.

How to reduce the mineralization and decomposition of soil organic carbon and increase soil organic carbon storage?

The construction of high-standard farmland should be closely integrated with moderate-scale operation, the transformation of low- and medium-yield farmland, the promotion of agricultural mechanization, and water-saving irrigation, and the overall promotion should be made to stabilize and increase grain yields. Vigorously promote the application of organic fertilizers and soil testing and formula fertilization, carry out research and development of efficient utilization and fertilizer saving technologies, improve the quality of cultivated land, minimize the use of chemical fertilizers and pesticides, and reduce carbon input. Develop and promote low-tillage and no-tillage cultivation technology to reduce carbon emissions in the process of tillage, and reduce the mineralization and decomposition of soil organic carbon.

Actively develop "low input, high output, low emission" ecological cycle carbon sequestration agriculture, encourage straw returning to the field, reduce environmental pollution, transfer fixed carbon into cultivated land, increase soil organic matter, and reduce carbon emissions. In areas with weak resource and environmental carrying capacity and high cultivated land use intensity, establish and improve the cultivated land fallow rotation system to stabilize the quality of cultivated land and improve the carbon sequestration capacity of cultivated land.

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(14 points) (1) Horizontal water content (2) Succession sampling method (3) There are many trees in the alder swamp, and the shrubs get less sunlight The amount of decomposition of the decomposer (4) Analysis: (1) The analysis of the question map shows that from the grass swamp to the larch swamp, this is a significant difference in the horizontal direction of the biological species, which reflects the horizontal structure of the community. Water content is the main abiotic factor influencing this difference in distribution.

2) The organic carbon content of birch swamp increased year by year for several consecutive years, indicating that the photosynthetic capacity of plants increased year by year, which was the result of community succession. Determination of plant species richness in forest areas, generally using sampling methods. (3) Compared with the shrub swamp, the organic carbon storage per unit area of the shrub layer in the Populus tomentosa swamp was low, and the data in the analysis table showed that the bogs had more trees and less sunlight.

The amount of organic carbon in the soil depends mainly on the amount of animal and plant remains and the amount of decomposition by decomposers. (4) According to the energy flow process, part of the organic carbon in the larch will be converted into carbon dioxide through cellular respiration and consumed, and part of it will flow to the decomposer with the residual branches and leaves. Test Center:

This question tests the relevant knowledge of communities and ecosystems, and is intended to test students' ability to understand the key points of what they have learned, grasp the internal connections between knowledge, obtain relevant biological information from extracurricular materials, and use this information to solve relevant biological problems based on what they have learned. Test Center Analysis: Test Center 1:

Populations and biomes Test Point 2: Concepts and Types of Ecosystems Test Point 3: Components of Ecosystems Question Attributes Question Type:

Difficulty: Assessment: Grade.

As the main body of carbon sequestration in terrestrial ecosystems, soil plays an important role in slowing down the rapid rise of greenhouse gases, but the assessment of this role has great uncertainty, and the key reason is that there is a lack of understanding of the natural process mechanism of soil carbon accumulation. Strengthening the research on the natural processes and mechanisms of soil carbon accumulation driven by vegetation succession, climate change and scientific management can deepen the natural understanding of the carbon sequestration function of natural forest and grassland ecosystems in China, highlight its effective role in climate change mitigation, and promote the development of carbon sequestration soil science.

From the perspective of national needs, China's implementation, international negotiations and independent actions to address climate change need to be supported by systematic data on soil carbon storage, carbon sequestration rate and potential of natural ecosystems, as well as scientific assessment methods of carbon sequestration potential that meet China's characteristics. Research on climate change, soil carbon sequestration function and potential of natural forests and grasslands can fill the corresponding knowledge gaps, and the task is urgent.