Mw. O. Makarova : City trees in Moscow

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10 Jan 2003 16:00
Unit: Wageningen University
Location: Aula (gebouw 362), Gen. Foulkesweg 1, Wageningen
Website: http://www.gcw.nl/dissertations/
Promotor: prof.ir. U.D. Perdok (Soil Technology)
Co Promotor: dr.ir. A.J. Koolen

 In Moscow, the Capital of Russia, the city trees are in a crisis. Moscow’s most frequent trees are line plantations of small leaved lime (Tilia cordata) in grass (lawn). The thesis presents for such plantations measured relationships between: results of visual assessment of tree condition (degree of withering); leaf size; shoot length; leaf transpiration; available water in the soil; heavy metals in the soil and leaves; residues of de-icing salt in the soil and leaves; nutrition ions in the soil; pH; humidity of the root zone; state of soil structure in the root zone. It was concluded that the sub-optimal condition of the city trees was mainly due to excessive use of de-icing salt and shortage of water. Soil structure was found to be surprisingly bad.
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