Trees growing in a natural forest environment have their roots anchored in a rich, well-aerated soil full of essential nutrients. The soil is blanketed by leaves and organic materials that replenish nutrients and provide an optimal environment for root growth and mineral uptake. Urban landscapes, however, are typically a much harsher environment with poor soils, little organic matter, and large fluctuations in temperature and moisture. Applying a 2 – 4 inch layer of organic mulch can mimic a more natural environment and improve plant health.
The root system of a tree is not a mirror image of the top. The roots of most trees can extend out a significant distance from the tree trunk. Although the guideline for many maintenance practices is the drip line – the outermost extension of the canopy – the roots can grow many times that distance. In addition, most of the fine, absorbing roots are located within inches of the soil surface. These roots, which are essential for taking up water and minerals, require oxygen to survive. A thin layer of mulch, applied as broadly as practical, can improve the soil structure, oxygen levels, temperature, and moisture availability where these roots grow.
Benefits Of Mulch
- Retention of soil moisture
- Weed and grass control
- Protection of the trunk and surface roots from mowing equipment
- Erosion control as mulch breaks the impact of rain
- Increased soil fertility when organic mulches placed directly over the soil decompose
- Improved soil structure (better aeration, temperature and moisture conditions)
- Simplified maintenance
- Improved appearance
- Reduced soil cracking that can damage small roots and speed drying
- Help in preventing soil compaction
For more information visit: American Lawn and Tree Arborist
Tags: aerated soil, benefits of mulch, essential nutrients, lawn and tree care, oxygen levels, root systems
