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Publications of Mukhametova Svetlana Valer'evna
Agriculture, 2021-3
Mukhametova S.V., Pavlova E.N., Nekhoroshkova E.V. - Fruit indicators and reproduction of hazelnut 'Academic Yablokov' pp. 1-12


Abstract: Hazelnuts have an important nutritional value. Breeders have bred a number of varieties capable of forming high yields in the conditions of the Central part of Russia. The purpose of this study was to analyze the fruit indicators and the reproduction potential of hazelnut variety 'Academic Yablokov' in the Mari El Republic. The advantage of this variety is large fruits and purple leaf color. The studies were conducted in 2020 and 2021 in the Botanical Garden-Institute of Volga State University of Technology (Yoshkar-Ola). The study showed that nuts have the mass of 2.0-2.4 g, the length and diameter of 2.4-2.6 and 1.4–1.6 cm, respectively. In the abnormally hot and dry conditions of 2021, the variety fruits were lighter and smaller compared to the excessively humid conditions of 2020. But the seed quality remained relatively high in both years of the study (82-84%). Sowing nuts using peat and sand as substrates revealed different soil germination of seeds in the experimental variants. The smallest number of seedlings was obtained in the peat variant (26%). The highest germination rate was established in the control variant (43%), but in the future the seedlings turned out to be in less favorable conditions for growth – by autumn they had the smallest height, diameter of the root neck, and number of lateral shoots. The seedlings in the variant with sand had the greatest height and length of the root system.
Agriculture, 2021-2
Okach M.A., Mukhametova S.V., Lyamina G.V. - The seasonal development of Crocus in the Mari El Republic conditions pp. 35-42


Abstract: Crocuses are beautifully flowering corm-bearing plants. They begin the growing season immediately after the snow melts. The research contains the results of phenological observations of 2014-2019 for plants of 6 Crocus taxa in the conditions of the Mari El Republic. Cultivars with early, medium and late periods of phenophase passage were identified. A flowering phenospectrum of the studied crocuses has been compiled. Crocuses vegetate from mid-April to early June for 40-50 days, and bloom from the third decade of April to early May. C. chrysanthus 'Prince Cloues' is characterized by the earliest unfolding of leaves and a short duration of their growth. The greatest value for landscaping is C. versicolor, characterized by the longest growing season and the earliest flowering, as well as C. chrysanthus ' Romance’ and C. angustifolia, characterized by the longest flowering within 2 weeks. The flowering of C. sieberi 'Spring Beauty’ is unstable. The obtained data on the seasonal development of crocuses can be used when including them in rockeries, alpine slides and other flower beds in natural-style gardens.
Agriculture, 2021-2
Sukhareva L.V., Mukhametova S.V., Zhelonkina T.Y. - Phenology of Pentaphylloides representatives in the Mari El Republic pp. 25-34


Abstract: Representatives of the genus Pentaphylloides are low ornamental shrubs that are valued for long abundant flowering, compact size and unpretentiousness to growing conditions. P. fruticosa is a valuable plant that has not only decorative value, but also food, medicinal, soil protection. For medicinal purposes, young flowering shoots are used, harvested during budding and flowering. The article presents the results of phenological observations in 2018-2020. The objects of the study were plants of 8 kinds of Pentaphylloides in the collection of the Botanical Garden-Institute of Volga State University of Technology (Yoshkar-Ola, Mari El Republic). The studied plants undergo most phases of seasonal development, with the exception of the mass end of shoot growth, complete lignification of shoots, mass ripening of fruits, mass leaf fall. Species and cultivars vegetated from the end of April – the beginning of May to the end of October in a short time. The vegetation period was 177-182 days. There was no significant difference in the timing of the passage of phenophases between the taxa. Plants of Р. × friedrichsenii and P. mandschurica passed most of the phenophases earlier than the average dates for the genus, and 'Goldfinger' and 'Klondike' – later. The earliest and longest flowering was characterized by P. friedrichsenii (65 d.), the latest and shortest – P. fruticosa (28 d.). All plants of P. fruticosa cultivars bloomed for a longer period than the species. After mass flowering, single flowers were observed in representatives of Pentaphyloides until mid-October.
Agriculture, 2020-4
Mukhametova S.V., Veselova K.A., Sukhareva L.V. - Deutzia in the Mari El Republic pp. 1-11


Abstract: Deutzia is an ornamental flowering shrub valued for its abundant long-term flowering and the elegance of flowers shape. The research objects are the plants of 3 species and 1 variety of Deutzia in the Botanic Garden-Institute of VSUT (Yoshkar-Ola, Mari El Republic). Plants aged from 38 to 45 years grow in the exhibition “Fruticetum”. The study was conducted in 2015-2019. The height and diameter of plants crowns, their winter hardiness for the period from 1981 to 2019, the morphometric indicators of leaves and inflorescences, the possibility of vegetative propagation by herbaceous cuttings, and the size of annual plants were studied. According to the study results, the most hardy is Deutzia of Amur, which forms the highest shrubs. The long-leaved Deutzia has the longest leaf blades, Deutzia scabra ‘Plena’ has the smallest leaves. The long-leaved Deutzia has the largest inflorescences, Deutzia of Amur and Deutzia scabra ‘Plena’ have the smallest ones. Deutzia magnifica and Deutzia scabra ‘Plena’ have ornamentality advantage over other species due to the double flowers. For the maximum display of ornamental qualities, the plants need a successful overwintering. The greatest ability to reproduce by herbaceous cuttings is noted for Deutzia scabra ‘Plena’. The results of this study are important for the Deutzia application in the garden and park construction. In the landscaping of the republic settlements Deutzia is recommended for the target assortment.
Agriculture, 2020-4
Mukhametova S.V., Konakova A.V., Sokolova K.I., Suchkova A.A. - Phenology of North American maple trees in the conditions of the Mari El Republic
pp. 31-42


Abstract: The article contains the results of the 2014 - 2018 phenology observation over 6 maple tree species (Acer L.) with natural habitats in North America. The objects of research were plants of the Botanical garden-Institute of VSUT: A. negundo, A. pensylvanicum, A. rubrum, A. saccharinum, A. saccharum, A. spicatum. The studied maples began growing at the end of April – the first decade of May and ended in October. The first, in the first decade of May, bloomed A. saccharinum and A. rubrum. Later blooming species were characterized by a longer flowering period, the latest and longest flowering within 20 days was observed in A. spicatum. Despite the different periods of flowering, the fruits of different species ripened relatively amicably, in the second half of September. The longest vegetation period was found in A. saccharinum (169±2.1 days), and this species is characterized by late autumn leaf blooming. The greatest period of autumn leaf blooming, more than a month, was characterized by A. spicatum. The studied species can be used in landscaping of the Mari El Republic settlements as part of an additional assortment, with the exception of A. negundo, which is a weed plant. Despite the similar timing of the passage of many phenophases, the variety of maples morphological features (shape and size of leaves, flowers and fruits, bark color, etc.) allows them to be used for decorative purposes. During the study period, the earliest passage of most phenophases was recorded in 2016, and the latest in 2017 and 2018.
Agriculture, 2020-3
Okach M.A., Mukhametova S.V., Kharisova K.V., Polkanova A.S., Yakupova G.I. - Medium-grown daylily flowering in the Republic of Mari El
pp. 1-6


Abstract: Daylily (Hemerocallis) is a perennial herbaceous plant widely used in landscape gardening. Daylilies are prized for their long term flowering mainly in late summer and low maintenance cultivation. According to flower spike height, the varieties are divided into runt, medium-growing and tall. The article contains the results of the study of 21 medium-growing daylily varieties’ terms of flowering in the botanic garden of the Volga region State University of Technology (Yoshkar-Ola, the Republic of Mari El). The research was conducted in 2015 - 2017. The calendar dates were converted into a continuous series. All varieties were classified as early, medium or late according to the terms of the beginning and the end of flowering and its duration. During three years of research, the earliest beginning of the phenological phase was registered in 2016, and the latest one  - in 2017. The early beginning and ending of flowering were typical for the varieties “Dr Regel” and “Royal Sovereign”. The late beginning of flowering was registered for the “Country Club” variety, and the late ending - for “Sandalwood”. Other varieties were classified as medium-term. The varieties “Royal Sovereign”, “Tejas”, and “Sugar Candy” are characterized by a short flowering period, while “Sandalwood” and “Derby Bound” - with a long one. It was established that the late-flowering varieties are characterized with a longer flowering period.
Agriculture, 2020-2
Mukhametova S.V., Novgorodskaya N.O., Anisimova S.V. - Seasonal development of European maples in the Republic of Mari El pp. 33-41


Abstract: The article contains the results of observations over 5 maple (Acer L.) species conducted in 2014 - 2018. The research objects are the plants growing in the Botanic garden of the Volga region State University of Technology: A. campestre, A. platanoides, A. pseudoplatanus, A. tataricum, A. trautvetteri. Their natural habitats are in the Caucasian-European region. In the wild, only A. platanoides grow on the territory of the Republic, others are introduced species. The authors analyze weather conditions over 5 years of research and establish that at higher average daily temperatures in 2016, the seasonal development stages came earlier, while colder weather conditions of 2017 hampered the phenophase. On average, the maples under study started vegetation in the first decade of May, and finished it in the third decade of September - mid October. The earlier vegetation started, the earlier sprouts started growing and flowering began. The easiest flowering was registered for A. platanoides in the second decade of May, then for A. campestre in the third decade of May. The latest and the longest flowering was registered for A. tataricum. Long-vegetating species were characterized by long growing of sprouts and late fall of leaves. In the autumn period, A. campestre and A. tataricum are the fanciest with a long period of leaves coloring.  A. pseudoplatanus and A. trautvetteri don’t have a phase of generative development due to poor winter resistance, and are not recommended for use in landscaping.  
Agriculture, 2019-4
Mukhametova S.V. - Fruiting of Rowan varieties in the Mari El Republic pp. 32-39


Abstract: Among fruit crops, Rowan is one of the most winter-hardy. In Russia, the predominant varieties are those derived from Sorbus aucuparia. Rowan fruits are used in fresh and dried form, they are valuable in food, dietary, and medicinal terms. The objects of this study were 7 Rowan varieties in the exposition «Wild fruit plants» of the Botanical garden-Institute of Volga State University of Technology (Yoshkar-Ola, Mari El Republic). The research was conducted in 2014–2019. The fruits were collected in the mass maturation phase and weighed in 3 samples of 100 pieces. The yield of air-dry fruits, expressed as a percentage, was obtained by the ratio of the mass of dried fruits to the mass of freshly harvested ones. It was found that the varieties ‘Alaya Krupnaya’, ‘Titan’, ‘Granatnaya’, and ‘Burka’ are characterized by large fruits. ‘Desertnaya Michurina’, ‘Nevezhinskaya’, and ‘Doch Kubovoy’ are small-fruited varieties. The most favorable for fruiting of most varieties were 2016 and 2019 with dry conditions of the growing season. Excessively moistened conditions in 2017 negatively affected the formation of Rowan fruits. The yield of air-dry raw materials was inversely correlated with the weight of fruits. The obtained data can be used in the organization of plantation cultivation of Rowan varieties in the conditions of the Volga-Vyatka region.
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