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Preventing Tree Transplant Failure11-02-05 | News



Preventing Tree Transplant Failure

By Darrell K. Downey, Chief Engineering Officer, PQ Partners, LLC






Researchers estimate that 75 percent of the tree?EUR??,,????'???s roots may be lost when digging field grown nursery stock. Most water absorption capability within a transplanted root-ball results from very small diameter roots. These fragile roots are the first to suffer from excess water loss in newly transplanted landscape plants.


One of the main reasons for high failure rates in tree transplanting is that even when accepted nursery practices are followed, less than five percent of the actual root system is moved with the tree. This results in severe water stress and a phenomenon called transplant shock.Either the tree installer provides so much water that the tree is asphyxiated or, much more often, not enough water is supplied during the critical establishment phase. Even if the tree survives its thirst-induced near death experience, it may take it several years to recover and get back on its normal growing track.






Pre-water the holes before planting to prevent initial post-plant water from migrating away from the root ball. Too much or too little water after transplanting is a major cause of tree or shrub loss. The site should be thoroughly watered immediately after planting. Thereafter, the soil will be regularly watered to prevent drying out.
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Instead of confusing the tree with a large soaking followed by several days of inactivity, an installed Ooze Tube?EUR??,,????<




To install an Ooze Tube?EUR??,,????<


Instead of being restricted to use on deciduous shade trees with high-flying branches, the device also works on conifers and multi-stems of all shapes and sizes. One tube will easily fit a tree with a caliper size up to 20 inches. It can irrigate for a week allowing air circulation around the tree?EUR??,,????'???s stem to avoid mildew formation or discoloration while placing no lateral force against the tree because its rather substantial filled weight is entirely supported by the soil. The tube comes in a 25-gallon size, as well as a 45-gallon size for large caliper trees, and is available in both dark brown or a light tan color. They can also be linked together or installed in a line to get more water and extend drip times even longer.






Position the stake about 18-inches away from the trunk, on the uphill side of the tree and drive it down until it is level with the top edge of the tube. For steep slopes, many people install the device at the top of the hill and use drip tubing to carry the water down to the tree. This eliminates ?EUR??,,????'??hill climbing?EUR??,,????'?? when it comes refill time!


The device can also help during the root pruning and hardening off preparation process and does not necessarily have to be installed around the tree trunk, but can be placed in any configuration, either in tandem or as stand alone water dispersion stations. Want to spread the water around even further? No problem, simply attach standard 1/4 inch drip tubing to the emitters and route the drips to any level or downhill location that you like.






Begin filling the tube with a hose. As it fills, adjust and position the tube. Remember, when completely full, it will be holding more than 25 gallons of water and will weigh over 200 pounds.


You can treat the tree with root stimulators, fungicides, fertilizers or any other type of foo foo dust that will stay in solution and they readily install on trees with low hanging branches or those having a multi-stem habit. The installer can also add root stimulators, pH adjusters, fungicides or fertilizers to the water without any waste. The tube won?EUR??,,????'???t plug with undispersed solids. It also won?EUR??,,????'???t waste the expensive additives by feeding the mixture faster than the tree can consume it.






Quickly insert the proper number of drip emitters after making sure the tube is completely filled with water. A 2-inch caliper tree needs far less water than a 4-inch caliper tree; you decide how much water to give your tree by adding or subtracting emitters.


This novel watering system has gained many credentials during its relatively short life. It has been specified on all roadside plantings by the landscape architectural group of the Georgia DOT. Alabama?EUR??,,????'???s DOT is on board. Many city and regional arborists have tested, specified, and recommended this technology to their peers. Thanks to some endorsements and recommendations by members of the American Nursery and Landscape Association, it was given one of twelve invitations to present at the summer meeting of ANLA in Washington D.C. this summer.






The drip emitter doesn?EUR??,,????'???t have to be at the very bottom because as the tube empties it will roll down and over the emitter. When your tree is established, remove the tube and use it again; the heavy gauge UV resistant material should withstand up to two years of full sun exposure.


Over ten thousand of these tree-friendly tubes are now happily going about their work of irrigating recently transplanted trees.

For more information, go to www.oozetube.com


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