On Reserves of Hippophae rhamnoides L. Fruit on the Territory of the Zarafshan National Nature Park of Uzbekistan

The article is devoted to the study of stocks of Hippophae rhamnoides fruits on the territory of the Zarafshan National Park. Hippophae rhamnoides is a medicinal plant. This species is a naturally distributed plant. All parts of Hippophae rhamnoides are a source of biologically active substances, especially flavonoids, carotenoids, phytosterols and others. In the course of field studies, 10 monitoring sites were selected in the size of 10 × 10 m, and the productivity of one site in the amount of 10 × 10 averaged 51.33 ± 8.24 kg. According to the results obtained, it was revealed that the biological reserve averages 21.9 tons, respectively, the operational reserve is 13.14 tons and the volume of annual harvesting averages 1.31 tons. When the water level of the Zarafshan River rises, some plants are damaged.

Bioclimatic Modeling of the Potential Distribution of the Western Tien-Shan Endemic <i>Tulipa kaufmanniana</i>Regel (Uzbekistan, Kazakhstan)

The article analyzes the natural distribution area of the species Tulipa kaufmanniana Regel using the programs of type MaxEnt and ArcGis, the endemic of Central Asia (past, current, future). According to the results of the study, it is proved that the main distribution of the species coincides with the boundaries of the areali Tien-Shan mountain system (Uzbekistan, Kazakhstan). It is noted that the climatic factors that are optimal for the species are sufficient temperature and annual precipitation.

Assessment of the State of <i>Onobrychis tavernierfolia</i>Stocks ex Boiss.(Fabaceae) Cenopopulations Southwestern Kyzylkum(Uzbekistan)

In the period 2019-2021, two coenotic populations of O. tavernierfolia were studied in different ecological and phytocenotic conditions of relic mountain Kuldzhuktau. Very rare species of the Kyzylkum. It is spread at the Kyzylkum: the Kuldzhuktau, near Ayak-Guzhumdy and Churuk (Bukhara region). Inhabits stony and gypseous slopes. There are three small populations can be found. Limiting factors: degradation of habitat as a result of overgrazing. Measures of protection: not protected. The article is devoted to the assessment of the current state of coenotic populations of the rarest southwestern Kyzylkum (Kuldzhuktau) Onobrychis tavernierfolia. It was found that the studied coenopopulations of O. tavernierfolia are normal and complete.

Phytocenotic Characteristics <i>Acanthophyllum cyrtostegium</i>Vved. (Caryophyllaceae) Distributed in Bukhara Region (Uzbekistan)

The article provides a phytocenotic description of Acanthophyllum cyrtostegium, distributed in the sandy and gypsum soils of Bukhara region (Uzbekistan). During the study, 6 plant communities were studied with the participation of the field work. There were 70 pcs vascular plants in these communities. The area of this plant, which is rare in the region, is 10 - 12 hectares, and the total number of 750 - 850 pcs. The results obtained from the evaluation of populations are used in carrying out monitoring studies for long years on rare plants. At the same time.he used it as a material for local “Red books”.

Distribution and Current State of Rare and Endangered Tulips (Liliaceae) Arid Zones of Uzbekistan

Central Asia is considered to be the primary center of origin and diversity for the genus Tulipa L. (Liliaceae). The article considers the species of rare and endemic Tulipa L. species in the arid regions of Uzbekistan. There are nine registered species of the genus Tulipa. In the course of the study, the demographic indicators of the modern population of 39 populations were evaluated. 39 populations of the studied species were identified, most of which grow in the composition of the wormwood formations characteristic of the Turanian floristic province.

Distribution Pattern and State of Coenotic Population of <i>Tulipa lehmanniana</i>Merckl. in Kyzylkum Desert Conditions (Uzbekistan)

The current state of coenotic populations of rare and endangered species of Uzbekistan-Tulipa lehmanniana Merckl. is given. Within the western part of the area (Kyzylkum desert) in different ecological and phytocenotic conditions, 8 coenotic populations of the species were identified. Based on the number of organism and population traits, the current state of coenotic populations of the species was evaluated. It was revealed that the vast majority of coenopopulations are in pessimal state. Coenopopulation only growing on the eastern part of the mountain Kuljuktau was assessed as optimal.

The Current State of Cenopopulation of <i>Tulipa micheliana</i>Hoog in Uzbekistan

The current state of coenotic populations of rare and endangered species of Uzbekistan-Tulipa micheliana Hoog is given. Based on the analysis of demographic indicators and a number of organisms and population signs, the state of the cenotic populations of the species was assessed, during the 2012-2018 years studied 15 cenopopulations different ecological-phytocenotic conditions in Uzbekistan.