Home |
Search |
Today's Posts |
#1
|
|||
|
|||
Kew Gardens - Radio 4 - Tree Roots
An interesting programme on Radio 4 today. It concerned the subject of tree root systems. (Plants from roots to riches). Here is my memory of the programme - but I suggest that anyone really interested listens to it on Iplayer as my recollection may not be 100% correct. In the very high winds and storms of 1987 a particular oak tree at Kew was totally lifted from the ground (including the root system) - but then it dropped back in to the hole! (The tree had been planted in the 1700s). The condition of the tree prior to the storms was causing some concern : thinning crown, dead wood, and poor leaf growth It took Kew three years to sort out the damage to the other trees from the storms and the particular tree was left until the end in order to decide what to do with it. The staff were very surprised to find that the tree was now in much better condition than what it had been before it was uprooted. They concluded that the number of visitors had compacted he earth over the years, over the root system - and that was what has caused the tree to be less than perfect with little or no growth. They also checked various research and were actually surprised to realise that the majority of tree roots tend to be only between 1m and 2m deep (a fairly unknown fact) - and that hence all the compaction had caused significant distress to the tree roots. They embarked on a change of policy - and started to aerate the roots of their trees - forcing compressed nitrogen (later air) in to the roots to a depth of about a metre. They also forced water and various feeds in to the root system. The results were astounding. They now use a modified process of forcing compressed air in to the root systems of all of their trees. I must admit I was gobsmacked with the comments about the depth of the root systems: I always thought that the main root system were much deeper than one or two meters. I have since found a page which explains the process in more detail than my poor memory: http://www.forestryjournal.co.uk/new...9/Iss27Kew.pdf |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Kew Gardens | Garden Photos | |||
Maple tree: small roots growing over (and into) large roots | Lawns | |||
Kew Gardens Pictures | Orchids | |||
Japanes Knotweed at Kew Gardens ? | United Kingdom | |||
Japanes Knotweed at Kew Gardens ? | United Kingdom |