FIELD: agriculture.
SUBSTANCE: invention refers to area of the substances influencing on plants growth and development. The method of obtaining of biologically active additive is carried out by drying the leaves of the mountaineer Sakhalin Reynoutria sachalinensis under normal conditions within 10-20 days and it's crushing. Later select a fraction of 0.5-4.0 mm and extract it by mix of carbon dioxide in a supercritical condition and the ethanol taken in number of 0.5-15 % of weights, of carbon dioxide weigh. Thus the correlation of fraction of the crushed leaves and extragent weightis from 2 % to 12 %.
EFFECT: invention allows expanding assortment of biologically active substances influencing of plants growth and development.
2 dwg
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