Tree Root Health – And the Soil Connection

To trees salt damage is generally seen by us in areas with cold winter climates. Stormwater runoff picks up deicing salt and enters tree pits. Often, roots are damaged when trees are planted inside small pits surrounded by compacted soil because this induces salty runnoff to swimming in the pit or percolate very gradually. When spring arrives, tree roots grow in the salt water\/soil mix. In high concentrations, the tree roots can be killed by the salt. In low concentrations, salt limits the uptake of nutrition and water. This results in the cholorotic trees getting desiccated with little, dry leaves and buds.

Salt runoff also occurs in open and parks planters where salt laden snow is piled with no corresponding tree health issues. Because soils permit to flush salt from 15, It’s. Background levels of salt might remain in dirt when trees roots begin to grow, but not at high levels which may harm roots. According to tree service in Springfield IL, recent case research suggests that integrating street water and related seasonal salt loads to A Silva Cell system doesn’t automatically produce a negative effect for trees. Adequately flushing soils of keeping or salt out salt of soil entirely will reduce tree origin mortality. Any application of salt in summer time must be carefully monitored as part of the landscape program.

When specific design requirements have been met, street trees and rainwater may co exist in mutually beneficial way. As incorporating stormwater to Silva Cells becomes a more common design strategy, engineers have been starting to create bypass systems to maintain winter runoff and associated salt out from the system. This is commonly done when road water is coming through a catch basin. A valve is installed on their distribution pipe which runs from the catch basin to the Silva Cells. The valve may be closed in the autumn prior to the first snow and after that opened again in their spring after their spring rain flush.

This does mean that during shoulder seasons Silva Cells wouldn’t be operating because a stormwater system, however, this time period represents a tiny proportion of the total annual rainfall. This sort of design can have higher maintenance and higher costs because valves will need to be manually closed from a surface port next to catch basins at their fall and be opened again in their spring. A more common approach to tackle salt in a Silva cell the application is to include a sturdy water in and water out design in order that spring rains will flush their bulk of their salts out of uncompacted soils. The Queensway project in Toronto is one such design.