PJB-2024-32
PLANTATIONS OF CARBON FARMS CREATED USING FAST-GROWING POPULUS TREES
RIDA SULTANOVA
Abstract
The formation of fast-growing forest plantations is a profitable and economically rational method of mitigating the effects of man-made atmospheric pollution. The amount and the level of carbon absorption during the plant life varies depending on some factors. An important role is played by the accumulated wood stock, age and breed composition. The leading trees are ripe and over-ripe Populus trees (they absorb up to 3.6 tons of 2 per year in terms of 1 ha). The experiments on the Populus tree breeding (Populus Nigra L. × Populus Nigra Var. Italica Du Roi, Populus simonii f. fastigiata Schneid and Populus koreana Rehder) determine that the best rooting of cuttings occurs in a sandy substrate, which is quite natural and meets the physiological characteristics of poplars growing in natural floodplain forests. During the experiment in a sandy substrate, the survival rate of cuttings of Populus Nigra L. × Populus Nigra Var. Italica Du Roi when treated with heteroauxin is 95.8% and 115%, respectively, relative to the control. At the end of the growing season, the conservation index of all poplar types grown in a sandy substrate and on the open ground, and treated with heteroauxin, exceeds the control by 15-44%. Heteroauxin increases the chlorophyll content in the leaves of shoots and hastens the root elongation. Thus, poplar roots are longer than the control and reach 19.98 cm. Even if the lamina of the shoots of Populus Nigra L. × Populus Nigra Var. Italica Du Roi is very small, the number of leaves growing during the maximum growth is bigger (24 ± 0.84 pcs.) compared to Populus simonii f. fastigiata Schneid. (16.3± 0.59 pcs.) and Populus koreana Rehder (14.5± 0.65 pcs.) A well-developing rooting system of these trees determines their survival rate and adaptation to different environments.
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