Particulate organic matter ( POM , macroorganic material, or coarse organic fraction material) is defined as soil organic matter between 0.053 mm and 2 mm. Isolated by sieving, this fraction includes soil detritus and plant material, pollen, and other partially decomposed materials. Consistent sieving is important when determining POM content because the isolated size fraction will depend on the strength of agitation
POM is ready for decomposition and functions a lot of ground function. It is a food or energy source for soil organisms and nutrients for plants. POM also improves soil structure that leads to increased water infiltration, aeration and resistance to erosion. Soil management practices, such as tillage and compost/fertilizer applications, change the content of soil and water POM.
Video Particulate organic matter
Roles in the ground function
POM decomposition provides energy and nutrients. Nutrients not taken by soil organisms may be available for plant uptake. The amount of nutrients released (mineralized) during decomposition depends on the biological and chemical characteristics of the POM, such as the C: N ratio. In addition to the release of nutrients, decomposers that colonize POM play a role in improving soil structure. Mushroom mycelium traps soil particles and releases sticky polysaccharides, such as cement, into the soil; eventually forming the aggregate of the land
Maps Particulate organic matter
The effect of soil management
Soil POM content is influenced by organic input and soil decomposition activities. The addition of organic materials, such as manure or plant residues, usually results in an increase in POM. Alternatively, repeated ground work or soil disturbances increase the rate of decomposition by exposing soil organisms to oxygen and organic substrates; finally, depleting POM. Reduction of POM content was observed when the original meadows were converted to agricultural land. Temperature and soil moisture also affect POM decomposition rate. Since POM is an easily accessible source of soil nutrients, it is a contributor to soil structure, and highly sensitive to soil management, it is often used as an indicator to measure soil quality.
Water surface contamination
In poorly managed soils, especially on sloping ground, erosion and transportation of POM-rich soil sediments may contaminate water bodies. Since POM provides a source of energy and nutrients, the rapid buildup of organic matter in water can produce eutrophication. Deferred organic materials can also serve as potential vectors for water pollution with fecal bacteria, toxic metals or organic compounds.
See also
- Particulate material
References
Source of the article : Wikipedia
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