Study of the root system of some rare and disappearing woody species of the Caucasus in the conditions of the Apsheron peninsula

Iskenderov, E.O.

Izvestiya Akademii Nauk Azerbaidzhanskoi SSR, Biologicheskie Nauki 3: 56-63

1990


Accession: 002504624

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Abstract
Details are given of the dimensions and weights of the roots and aerial parts of plants 1-3 years old of 21 species of broadleaved trees and shrubs in the Apsheron peninsula (Azerbaijan). Data are also given on the growth and spread of the roots in 30-day seedlings of 5 of the species. Two groups of plants are distinguished, viz. those with a well-developed tap root, e.g. Quercus castaneifolia, Gleditsia caspica etc., and those with a poorly developed taproot, e.g. Euonymus velutina, Zelkova carpinifolia, Buxus sempervirens etc. In 1-year-old plants, the dry weight of the root system exceeds that of the aerial parts, but this situation is reversed in 3-yr-old plants. Details are given of the dimensions and weights of the roots and stem of 21 species of native and introduced woody plants at ages 1, 2 and 3 yr when grown in the Apsheron peninsula, Azerbaijan. Two main groups of plants were distinguished: those with a well-developed taproot (e.g. Quercus castaneifolia, Gleditsia caspica); and those with a poorly developed taproot (e.g. Albizia julibrissin, Euonymus velutina, Zelkova carpinifolia, Buxus sempervirens). Seedlings 2-3 yr old with a poorly developed taproot form a good system of lateral roots, mostly at depths of 20-35 cm.