This article studies the indicator properties of gastropods common in the Upper Syr Darya River basin. They are divided into ecological groups according to their habitats. The generally accepted ecological and zoological methods were used in the research. According to the research results, fresh-water gastropods of the Fergana Valley inhabit xenosaprobic, oligosaprobic, β – mesosaprobic, α – mesosaprobic and β – polysaprobic waters. Molluscs are mainly distributed in stagnant water bodies. The substrate of most mollusks are aquatic plants.
KEY WORDS: gastropods, bioindicator, saprobity, ecological group, pollution.
This article highlights the results obtained on the basis of scientific research carried out in 2019-2020 on the technology of reproduction from the seeds of Magnolia grandiflora plant in the farmer’s farm named “Saydullo Temirov” specialized in the cultivation of landscape trees and shrubs located in the Uighur village of Pakhtaobod District of Andijan region. As a result of the study, determination of seed stratification time, planting time and methods, as well as maintenance work were determined, and conclusions were made.
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