scholarly journals New segetal communities of sunflower crops in the Orenburg Region

2021 ◽  
Vol 10 (2) ◽  
pp. 124-130
Author(s):  
Sergey Maratovich Yamalov ◽  
Gulnaz Rimovna Khasanova ◽  
Maria Vladimirovna Lebedeva ◽  
Vladimir Vladimirovich Korchev

The diversity of weed-field communities of sunflower crops within the forest-steppe zone of the Orenburg Region (Abdulinskiy, Matveevskiy, Oktyabrskiy, Aleksandrovskiy, Sharlykskiy districts) was studied. The communities in the system of ecological-floristic classification units are assigned to the new variant Orobanche cumana of the Amarantho blitoides - Lactucetum tataricae Khasanova et al. 2019. In the core of the cenoflora of communities juvenile weed species prevail. The most active of them are late spring annuals ( Amaranthus blitoides , Panicum miliaceum , Amaranthus retroflexus , Setaria viridis ) and early spring annuals ( Chenopodium album , Fallopia convolvulus , Camelina microcarpa ). Root perennials such as Lactuca tatarica , Convolvulus arvensis , Euphorbia virgata , Cirsium arvense have also a high proportion. A distinctive feature of the communities is the participation in their floristic composition of a dangerous quarantine species - Sunflower broomrape ( Orobanche cumana ). Modeling the area of the association under a moderate scenario of climate change shows that the distribution of communities by 2050 can cover almost the entire territory of the Cis-Urals (within the Republic of Bashkortostan). It is necessary to organize a monitoring system for the range of these communities in the Southern Urals.

2020 ◽  
Vol 62 ◽  
pp. 70-76
Author(s):  
O. E. Merezhko ◽  
M. A. Mazunin ◽  
E. Z. Savin ◽  
A. I. Gridnev

The article presents tests of natural creeping apple trees and natural dwarfs, carried out in the in the conditions of the Orenburg region. There were from 50 to 100 trees in the experiment in each variant. Vigorous standard plantations were used as control. The aim of the research was to test natural creeping apple trees, natural dwarfs against the background of standard varieties bred in the South Urals (Chelyabinsk), as well as to determine their prospects for intensive horticulture in the extreme conditions of the region. The preservation of plantings for all variants of the experiment for 20 years of research is high and amounted to 92-99 %, their condition was estimated at 4.5-5.0 points. The highest yield was noted for natural dwarfs (457.2 c/ha), the smallest yield was obtained on vigorous standard plantings (control) – 238.7 c/ha. Naturally creeping apple trees in terms of productivity were higher than control by an average of 25 %. Of the naturally creeping varieties, the most productive were the varieties Podsnezhnik (348.3 c/ha), Chudnoe (335.2 c/ha), the least productive were the varieties Plastun and Kovrovoe (255.1 and 262.5 c/ha, respectively). On the natural dwarfs, the most productive variety was the variety Brat Chudnogo (461.2 c/ha). In the control, the most productive varieties were the varieties Symbol (295.9 c/ha) and Nadezhda (270.5 c/ha), less productive were the varieties Pamyat Zhavoronkova and Fevralskoe (208.0 and 224.1 c/ha, respectively). Low-growing plantations, in particular layer and natural varieties of the Urals, are distinguished by their early maturity and, in general, higher productivity per unit area. The highest labor costs are accounted for by natural dwarfs (485.4 person-day/ha) and the lowest in vigorous plantings (317.4 person-day/ha). This has a positive eff ect on the profit and rentability of production.


Author(s):  
N.V. Glaz ◽  
◽  
A.K. Gorbunov

Research 2019-2020 in the conditions of the forest-steppe zone of the Chelyabinsk region showed that the effect of glauconite on the yield and seed productivity of potatoes largely depends on the variety. The effect of glauconite (in doses from 10 to 40 t / ha) on the yield of tubers was proportional to the duration of the growing season of the varieties. The highest yield gains from glauconite were observed in the mid-ripening variety Tarasov – 4.05–4.62 t/ha, then in the medium-early variety Nevsky – 3.26–3.63 t/ha, and the smallest – were in the early variety Rosara – 1.95–2.26 t/ha. Whereas the effect of glauconite on the seed productivity of varieties had the opposite pattern: the greatest increase was observed in early-maturing varieties (Rozara – 1.30–1.56 times, Nevsky – 1.30–1.61 times), and the smallest – in the mid-season variety Tarasov (1.17–1.25 times).


10.12737/6546 ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. 135-138
Author(s):  
Мухитов ◽  
Lenar Mukhitov ◽  
Самуилов ◽  
Feofan Samuilov

The impact of contrasting conditions of water availability on the size of the upper internodes in wheat varieties was studied under the conditions of the Orenburg steppe zone. It was noted, that less drought-resistant varieties formed a short upper internodes. We conducted a mathematical analysis of the relationship of productivity and length of ear-carrying internodes of spring soft wheat varieties of different ecological groups. It was established, that we can observe a gradual increase of grain productivity with increasing the length of the upper internodes in the studied range. As a result, the following varities were selected for inclusion into the hybridization: Logachevka, Tulaykovskaya steppe, Tulaykovskaya 1, Tulaykovskaya Belozernaya, Prokhorovka and Uchitel. They have the optimal settings for the presented feature. Using the selected varieties as parental forms can enhance the efficiency of wheat breeding programs for resistance to drought in the forest-steppe zone of the Southern Urals.


Author(s):  
L. F. Beksheneva ◽  
A. A. Reut

The article provides information about some biological features of the rare species Iris aphylla L., listed in a number of regional Red books. Ten-year-old plants, introduced into the South-Ural Botanical Garden- Institute of Ufa Federal Research Centre of RAS, were studied. Phenological features of the species, indicators of seed productivity and morphometric parameters of cultivars were studied. The assessment of decorative qualities and success of introduction of I. aphylla is carried out. It was revealed that the seed-grown species of I. aphylla in the forest-steppe zone of the Bashkir Urals passes the full cycle of development. According to the terms of flowering, the introduced species is referred to the group of early-flowering irises. Seed productivity is estimated as average. According to the assessment of the decorative qualities I. aphylla is referred to medium decorative plants. The early and fairly long flowering has been noted, as well as the presence of several buds on the shoot. The success of the introduction was six points, that is, the introduced species regularly mass flowering, bears fruit, reproduces vegetative, has a high resistance to local climatic conditions. I. aphylla is recommended to replenish the zonal assortment of cultivated plants of the Republic of Bashkortostan.


10.12737/1363 ◽  
2013 ◽  
Vol 8 (3) ◽  
pp. 106-112
Author(s):  
Мухитов ◽  
Lenar Mukhitov ◽  
Самуилов ◽  
Feofan Samuilov

On the basis of summarizing the results of many years experience on environmental study varieties and breeding numbers of spring wheat, we can base models of early maturing, middle maturing and mid-season varieties for the forest-steppe zone of Orenburg region. The identified dependence of grain yield on the productivity elements, morphological and structural features, the assimilation apparatus parameters, biological and physiological characteristics reliably described by the equations of regression. Such kind of varities, as Varyag, D-1847/97, Omskaa 20, Prokhorovka, Samsar, Saratovskaya 42 and Solveig were high adaptive capacities in this area. It is well to combine the best parameters of efficiency elements of main spike in favorable years: Kinelskaya 59, Lyuba, Moskovskaya 35, Orenburgskaya 13, Prokhorovka, Saratovskaya 55 and Enita; in dry years: Logachevka, Saratovskaya 42, Solveig and D-1847/97. The optimal parameters of the assimilation apparatus were observed in the following varities: Volgouralskaya, Varyag, Kinelskaya 59, Logachevka, Lyuba, Prokhorovka, Solveig, Tulaykovskaya 1, steppe Tulaykovskaya and Enita. The use of hybrid models in the selection of breeding material and varieties, selected as parent forms to better address selection on efficiency and sustainability in the forest of the Southern Urals.


10.12737/2220 ◽  
2014 ◽  
Vol 8 (4) ◽  
pp. 124-129
Author(s):  
Мухитов ◽  
Lenar Mukhitov ◽  
Самуилов ◽  
Feofan Samuilov

On the basis of summarizing the results of many years of experience about environmental study of varieties and breeding varieties of spring wheat, we revealed the peculiarities of influence of plants’ assimilation apparatus parameters on the productivity level of early ripening, middle- and late ripening varieties in the forest-steppe zone of Orenburg Urals. These varieties should be used to create hybrid forms of spring wheat with optimal parameters of photosynthetic surface. This will better in solution the selection issues on efficiency in the forest of the Southern Urals. As a result, during the study of the influence of the size of the surface to the grain photosynthetic productivity level of wheat varieties, we found that in this case with an increase in the parameters of the assimilation apparatus, there is an increase of yields up to a certain limit, then a further increase in the size of the photosynthetic surface leads to lower yields. This pattern is clearly related to the fact that the overgrowing foliage due to worsening conditions for leaf photosynthetic activity, the rate of photosynthesis decreases. The following studied varieties of spring wheat have optimal parameters of the photosynthetic index: Volgouralskaya, Varyag, Kinelskaya 59, Logachevka, Lyuba, Prokhorovka, Solveig, Tulaykovskaya 1, Tulaykovskaya stepnaya and Enita. These varieties should be used to create hybrid forms of spring wheat with optimal parameters of the assimilation apparatus.


2018 ◽  
pp. 120-137 ◽  
Author(s):  
G. R. Khasanova ◽  
S. M. Yamalov ◽  
M. V. Lebedeva

Segetal communities are the sets the weed plant species which are formed under the influence of edafo-climatic conditions and the mode of disturbance — the systems of processing of the soil in a crop rotation (so-called agrotechnical factor) (Mirkin, Naumova, 2012). The history of their study in the Southern Urals is more than 80 years old (Dmitriyev, 1935; Gaysin, 1950; Minibaev, 1961; Bakhtizin, Rakhimov, 1968; Denisova et al., 1970). Development of classification according to floristic approach has been begun in the 1980th by Ufa geobotanists. Results have been generalized in the collective monography (Mirkin et al., 1985). A repeated syntaxonomical analysis was carried out a long time later only for the Trans-Ural region of the Republic of Bashkortostan (Yamalov et al., 2007). The purpose of the present research is to reveal a phytodiversity of weed vegetation of the Southern Urals, using all available geobotanical data, and to develop its syntaxonomy. This paper presents the results of the classification of one of the three allocated alliances. The dataset contains 1171 relevés: 891 were performed by authors in the course of the 2002–2016 field seasons, while 280 are taken from the mentioned monography (Mirkin et al., 1985). All plots belong to class Papaveretea rhoeadis which combines annual weed vegetation of winter, summer and the row-crop cultures, gardens and initial stages of succession (Mucina et al., 2016). Within the class these are distributed between orders Aperetalia spicae-venti J. Tx. et Tx. in Malato-Beliz et al. 1960 and Papaveretalia rhoeadis Hüppe et Hofmeister ex Theurillat et al. 1995. Alliance Scleranthion annui (Kruseman et Vlieger 1939) Sissingh in Westhoff et al. 1946 goes to the first one, while Caucalidion Tx. ex von Rochow 1951 and Lactucion tataricae Rudakov in Mirkin et al. 1985 — to the second. The alliances are well differentiated floristically (Table 2) and according to zonal affinity. Alliance Scleranthion annui (Fig. 2) combines the most mesophyte communities distributed mainly on gray forest and soddy podzolic soils, rarer on other types of soils in the southern part of the forest zone and northern part of the forest-steppe one. Diagnostic group includes terophytes: Centaurea cyanus, Tripleurospermum perforatum, Euphorbia helioscopia, Capsella bursa-pastoris, Polygonum aviculare, Viola arvensis, Raphanus raphanistrum. Alliance Caucalidion (Fig. 3) combines communities on rich carbonate chernozem soils of the forest-steppe zone. It is intermediate between Scleranthion annui and Lactucion tataricae in zonal gradient. Diagnostic species are Galeopsis ladanum, Sonchus arvensis, Persicaria lapathifolia, Galeopsis bifida, Silene noctiflora, Erodium cicutarium, Thlaspi arvense, Galium aparine. They are also highly constant in communities of alliance Scleranthion annui in the forest zone, but are absent or low constant in these of alliance Lactucion tataricae in the steppe zone. Alliance Lactucion tataricae (Fig. 4) combines floristically impoverished communities in the steppe zone on south chernozem soils. Two species are diagnostic: hemicryptophyte Lactuca tatarica and terophyte Panicum miliaceum. There are 4 associations, 3 subassociations and 5 variants within the alliance Scleranthion annui. The ass. Linario vulgaris–Lactucetum serriolae ass. nov. hoc loco (Table 4, 5; holotypus — Table5, N 8) combines communities of winter and row-crop cultures, widely spread in the forest zone and northern part of the forest-steppe one on gray forest and soddy podzolic soils, which are common in the northernmost regions of the Cis-Urals within the territory of the Republic of Bashkortostan. Some of them occur in northern flat forest areas as well as in the northern forest-steppe, while few of these are located in the foothill forest regions. Besides the species of alliance Scleranthion annui and class Papaveretea rhoeadis there are ruderal perennials of classes Artemisietea vulgaris Lohmeyer et al. in Tx. ex von Rochow 1951 and Polygono arenastri–Poëtea annuae Rivas-Martínez 1975 corr. Rivas-Martínez et al. 1991, such as Artemisia absinthium, A. vulgaris, Plantago major, Elytrigia repens etc. which are character for disturbed habitats. Also important is the presence of apophytes of classes Molinio-Arrhenatheretea R. Tx. 1937 and Trifolio-Geranietea sanguinei Th. Müller 1962 (Poa pratensis, Trifolium pratense, Knautia arvensis, Pimpinella saxifraga etc.) common in meadows and forest edges. The ass. Consolido regalis–Centaureetum cyani ass. nov. hoc loco (Table 6; holotypus — N 26) combines communities of winter and summer crops (wheat, rye, rarer barley), widely spread in forest zone and northern part of forest-steppe one. They are located on gray forest and soddy podzolic soils. Three subassociations are discribed within association according the agrotechnology of the prevailing culture. The ass. Galeopsietum bifidae combines communities of winter crops which were widely spread in a forest-steppe zone on the podzolic chernozem in the 1980th (Mirkin, et al., 1985). The association is intermediate between the alliance Scleranthion annui and Caucalidion. The ass. Euphorbio helioscopiae–Fumarietum officinalis ass. nov. hoc loco (Table 7, 8; holotypus — Table 8, N 9) combines communities mainly of the row-crop and the summer cultures in the forest zone in flat and mountain regions and also in northern part of the forest-steppe zone. They are located on gray forest soils and rarer on the podzolic chernozem. Differentiation of associations is illustrated by the DCA-ordination data (Fig. 6). The first axis is interpreted as a complex gradient of moistening and an agrocoenotic factor. Along the second axis of soil richness-salinity the communities on soddy podzolic soils are replaced by those on mountain variants of gray forest soils and the podzolic chernozem.


2020 ◽  
pp. 71-80
Author(s):  
Evgeny Z. Savin ◽  
Nikolay M. Solomatin ◽  
Alexander A. Mushinsky ◽  
Tatyana V. Berezina ◽  
Alexander V. Korshikov ◽  
...  

Author(s):  
A.V. Sleptsova

The results of the study of the dental anthropology complexes of the population of the Sargatka, Gorokhovo and Kashino cultures of the Early Iron Age in Western Siberia are presented. The source base of the study is 490 individuals from burials located in the Tobol, Ishim, Irtysh River regions, as well as on the territory of the Baraba forest-steppe zone. The aim of this study is to reconstruct the origin and processes of the formation of the anthropological composition of the population of the Sargatka, Gorokhovo and Kashino cultures on the basis of new dental anthropological data. Trigonometrically transformed dental trait frequencies were subjected to the principal component analysis. Be-sides Sargatka, Gorokhovo and Kashino cultures samples, 17 Bronze Age and 27 Early Iron Age dental samples from different region of Eurasia were used for statistical comparison. The results of the statistical comparison may possible to make a several conclusions. The anthropological composition of the Gorokhov population and Sargat groups from the Tobol, Ishim and Irtysh River regions was significantly influenced by diachronic contacts with the descendants of the Andronovo tribes of the Southern Urals, and synchronous relation with the Savromats and Sarmatians of the Southern Urals. The population of the Sargatka culture and the Gorokhovo groups, simultane-ously living on the territory of the Tobol River region in the 5th–3rd centuries BC significantly different from each other. However, the subsequent close population relation between the Sargatka and Gorokhovo groups and their contacts with the Sarmatians contributed to the convergence of their anthropological composition. In the formation of the anthropological composition of the Sargatka population of Baraba forest-steppe zone the main role belongs to the local Late Bronze groups — the Fedorovo Bronze Age population of Western Siberia and their descen-dants, people of the Irmen culture. The most specific is the anthropological composition of the Kashino popula-tion. The specificity of the small group of the Abatsky 3 burial of Kashino culture from the Ishim River region lies in the sharp predominance of the features of the “eastern” dental non-metric complex, which distinguishes this popu-lation from the groups of the Bronze Age and the Early Iron Age of Western Siberia and adjacent territories.


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