scholarly journals Segetal communities on rendzina soils near Sieradz

2013 ◽  
Vol 33 (2) ◽  
pp. 269-298
Author(s):  
Jan T. Siciński ◽  
Ryszard Sowa
Keyword(s):  
Middle Part ◽  
Intermediate Structure ◽  
Anthropogenic Factor ◽  
Habitat Conditions ◽  
Northern Limit ◽  
Root Crop ◽  
Segetal Communities

In the years 1973-1978 floristic and phytosociological investigations were performed on field cultures on rendzina soils near Sieradz, by the middle part of the Warta river. The mosaic character of the soil of the investigated area on which segetal communities had developed and the continuous interference of a man (an anthropogenic factor) cause a large diversity in the examined area. Altogether in grain and root crop cultures there were distinguished 5 associations, 6 communities and many lower phytosociological units (subcommunities, facies and degree of moisture). Among the distinguished units of vegetation <em>Caucalido-Scandicetum</em> and communities with intermediate structure deserve particular attention. The association has an impoverished structure, only partly developed, which is probably due to the northern limit of the range of occurrence, habitat conditions (mainly edaphic) and the level of agriculture.

scholarly journals Plant communities of cultivated fields of the Podlaski Przełom Bugu mesoregion. Part 5. Root crop communities of light soils

2012 ◽  
Vol 60 (1) ◽  
pp. 191-205
Author(s):  
Zofia Rzymowska ◽  
Janina Skrzyczyńska
Keyword(s):  
Plant Communities ◽  
Floristic Diversity ◽  
Setaria Viridis ◽  
Habitat Conditions ◽  
Root Crop ◽  
Root Crops ◽  
Heterogeneous Habitat ◽  
Wide Range ◽  
Phytosociological Relevés ◽  
Segetal Communities

This present paper, focused on root crop communities of light soils, is a part of the wide range characteristics of segetal communities of the Podlaski Przełom Bugu (Podlasie Bug River Gorge) mesoregion. On the basis of 160 phytosociological relevés made according to the Braun-Blanquet method, phytocenoses representing the <i>Panico-Setarion</i> alliance were distinguished. Most often, patches of the association <i>Echinochloo-Setarietum</i> were recorded in the study area. Heterogeneous habitat conditions affect its floristic diversity. Two subassociations of the phytocenosis, divided according to the species composition into 9 lower syntaxa, were identified on light soils. The following subassociations were distinguished: <i>Echinochloo-Setarietum setarietosum glaucae</i> in a typical variant and a variant with <i>Juncus bufonius</i>, both with subvariants with <i>Digitaria ischaemum</i>, as well as a typical variant of <i>Echinochloo-Setarietum typicum</i>, a variant with <i>Juncus bufonius</i> and a subvariant with <i>Oxalis stricta</i> in the typical and wet variant. Another association found in root crops on light soils of the Podlaski Przełom Bugu mesoregion is <i>Digitarietum ischaemi</i>. Its patches were observed in cultivations on light, acidic, poor soils. The characteristic feature of this community is the occurrence of numerous acidophilous species. In habitat conditions typical for the Podlaski Przełom Bugu mesoregion, <i>Digitarietum ischaemi</i> is differentiated into the typical and wet variant. Quite frequent patches of the <i>Setaria pumila-Setaria viridis</i> community were noted in intermediate habitat conditions, between those characteristic for <i>Digitarietum ischaemi</i> and <i>Echinochloo-Setarietum</i>.

scholarly journals Parietaria pensylvanicu Mühlenb. ex Willd. - potentialities of migration from park habitats to segetal communities

2013 ◽  
Vol 53 (1) ◽  
pp. 65-74
Author(s):  
Anna K. Sawilska ◽  
Józef Misiewicz
Keyword(s):  
North America ◽  
Life Strategy ◽  
Vegetable Crops ◽  
Habitat Conditions ◽  
Vegetation Season ◽  
Type Selection ◽  
Density And Biomass ◽  
Segetal Communities

Parietaria pensvlvanica Mühlenb ex. Willd is a species native to North America, whose occurrence in Poland was first reported in Bydgoszcz in 1991. Its biology and ecology has been researched since 1996. The present paper discusses measurements and phenological observations carried out on four selected populations during the vegetation season in 1997. The aim of the research was to determine potentialities of the migration of P. pensylvanica from park habitats to segetal communities, on the basis of a defined life strategy of the examined populations. The analysis focused on the dynamics of density and biomass as well as on the weight of 1000 nucules, against the habitat conditions. The findings demonstrated that the investigated species was characterised by a set of life strategy properties referred to as C-S-R or S-R, and was subject to the "r"-type selection. P. pensylvanica has become an integral part of the Bydgoszcz flora and is likely to expand into segetal communities of agricultural and vegetable crops.

scholarly journals Zróżnicowanie zbiorowisk segetalnych jako wyraz luarunków siedliskowych i poziomu kultury rolnej wsi Oleśnik (woj. Piotrków Tryb.) [Differentiation of vegetal communities as an expression of habitat conditions and agriculture standard of the village Oleśnik (Piotrków Tryb. District)]

2015 ◽  
Vol 29 (2) ◽  
pp. 311-372
Author(s):  
Urszula A. Warcholińska
Keyword(s):  
Sandy Soil ◽  
Analytical Description ◽  
Agricultural Management ◽  
The State ◽  
Habitat Conditions ◽  
Natural Conditions ◽  
The Given ◽  
The Village ◽  
Segetal Communities

The paper is an analytical description of the differentiation of acidophilic segetal communities of the village Oleśnik (Piotrków Tryb. District) against the background of habitat conditions and standard of agriculture (Tables 3-13, Figs. 3-6). The present segetal vegetation reflects the natural conditions and the state of agricultural management of the agricultural acreage of the village (Figs. 1, 2). It is also an index of the productive passibilities of habitats with the poorest sandy soil. Therefore it may be useful for their evaluation (Table 16). The number, spread and distribution of the distinguished communities are evidence of the phytosociological-ecological nonhomogeneity and indicate the agricultural standard in the given area.

scholarly journals Encroachment of woody species on a drained transitional peat bog in ‘Mszar Bogdaniec’ nature reserve (Western Poland)

2015 ◽  
Vol 57 (3) ◽  
pp. 160-172 ◽  
Author(s):  
Marcin K. Dyderski ◽  
Anna K. Gdula ◽  
Andrzej M. Jagodziński
Keyword(s):  
Nature Reserve ◽  
Propagule Pressure ◽  
Woody Species ◽  
Middle Part ◽  
Peat Bog ◽  
Habitat Conditions ◽  
Wetland Ecosystems ◽  
Rate Of Succession ◽  
Herb Species ◽  
Better Than

Abstract One of the most important threats for open peat bog ecosystems is encroachment of woody species, which causes transformation of habitat conditions and leads to retreat of specialised species. Drainage increases the rate of succession. The aim of study is the assessment of human-accelerated succession in a transitional bog. The study was conducted in ‘Mszar Bogdaniec’ nature reserve (W Poland). The structure of vegetation and tree stands was described and compared using ordination methods. Near the peat bog border, tree stands of Betula pubescens developed. Towards the middle part of the peat bog, the number, cover and height of trees decreased. The central part of the peat bog was covered by Sphagno recurvi–Eriophoretum vaginati in dryer parts and Sphagno recurvi–Eriophoretum angustifolii in wetter parts. The study showed that the successional sequence in these conditions differs from the classical bog succession scheme. Despite high propagule pressure of Pinus sylvestris, the most important woody species was B. pubescens, which performed better than other species. Erechtites hieracifolia, an alien invasive herb species, which previously was rarely recorded in bogs, appeared when the bog was dried by drainage. In this study, it reached high frequency and abundance, which shows that it may be a next serious threat to disturbed wetland ecosystems.

Habitat requirements and germination performance of some relict populations of Ligularia sibirica (Asteraceae) from Romania

2018 ◽  
Vol 151 (3) ◽  
pp. 314-326 ◽  
Author(s):  
Alina G. Cîșlariu ◽  
Ciprian C. Mânzu ◽  
Maria M. Zamfirache
Keyword(s):  
Filter Paper ◽  
Nitrogen Availability ◽  
Germination Rate ◽  
Negative Influence ◽  
Middle Part ◽  
Population Characteristics ◽  
Reproductive Capacity ◽  
Habitat Requirements ◽  
Soil Reaction ◽  
Habitat Conditions

Background and aims – Ligularia sibirica is a glacial relict plant species in Europe. Its populations are rare and endangered in most of the European localities. Studies on glacial relics are insufficient; among them only a few focus on the population characteristics and their reproductive capacity. We aimed to determine the habitat requirements of L. sibirica populations; which factors affect the reproductive output of the populations and how the interaction of ecological and biological parameters influences their germination capacity.Methods – We described habitat conditions in terms of the Ellenberg indicators (for nitrogen availability, moisture, light, soil reaction, and temperature) in each analysed population. To determine which factors affect the population viability we performed a series of regression analyses. Germination experiment was carried under laboratory-controlled conditions at a 14/10 h. photoperiod and 24/16°C temperature, for 32 days, with cold stored seeds (at 4°C), and seeds stored at room temperature on a different substrate (moist filter paper and oligotrophic soil). The parameters influencing population germination rate were determined with general linear models. Key results – We found that the soil humidity, nitrogen availability, temperature, and lighting are the ecological factors influencing the morphological features of L. sibirica populations. The largest seeds are in the middle part of the inflorescence though this parameter has no influence on germination rate. The seeds germinated better on moist filter paper. Cold stored seeds did not show higher germination rate. Germination increased with the altitude of the populations and the seeds mass, whilst higher values of density had a negative influence on it. Conclusions – Our results suggest that habitat conditions and population characteristics are highly related to the germination success of L. sibirica. The prosperity of a population (expressed by the number of individuals) is not a guarantee of reproductive success, the densest populations having the lowest rates of germination.

scholarly journals Changes of segetal vegetation of the Piotrków Plain during the last 22 years. Part II. Communities of weeds of flax and root crop cultures

2013 ◽  
Vol 47 (1) ◽  
pp. 37-54
Author(s):  
A. Urszula Warcholińska
Keyword(s):  
Present State ◽  
Root Crop ◽  
Segetal Communities

This paper presents the results of research on changes in segetal communities of flax and root crop cultures of the Piotrków Plain (see W a r c h o l i ń s k a, 1994 - Figure 1) which took place during the period between 1971 and 1972 and between 1992 and 1993. On the basis of 72 phytosociological records, taken in 50 localities (Figures 1, 2) in the years of 1971 and 1972, 5 associations were distinguished: one in the flax culture (Table I) - <i>Spergulo-Lolietum remoti</i> and four in the root crop cultures (Tables II-V) - <i>Digitarietum ischaemi, Echinochloo-Setarietum, Galinsogo-Setarietum</i> and <i>Lamio-Veronicetum politae</i>. According to the repeated listing carried out in the years of 1992 and 1993 the changes in the communities of the above - mentioned items were stated. The comparison of the present state of these communities with their state of 22 years ago allowed to note that the changes of the analyzed agrophytocoenoses of flax and root crop cultures are caused by progressive anthropopressure.

ON THE INTERMEDIATE STRUCTURE IN THE 12C-12C-SCATTERING

1971 ◽  
Vol 32 (C6) ◽  
pp. C6-193-C6-195 ◽  
Author(s):  
H. J. FINK ◽  
W. SCHEID ◽  
W. GREINER
Keyword(s):  
Intermediate Structure

INTERMEDIATE STRUCTURE IN LIGHT ION REACTIONS

1976 ◽  
Vol 37 (C5) ◽  
pp. C5-177-C5-194 ◽  
Author(s):  
H. Feshbach
Keyword(s):  
Intermediate Structure

Status of nondestructive control of transport function metal products at JSC EVRAZ NTMK

2020 ◽  
Vol 76 (6) ◽  
pp. 586-590
Author(s):  
S. P. Bersenev ◽  
E. M. Slobtsova
Keyword(s):  
Crack Detection ◽  
Middle Part ◽  
Control Line ◽  
Magnetic Powder ◽  
Nondestructive Control ◽  
Automated Control ◽  
Ultrasonic Control ◽  
Acoustic Contact ◽  
In Series

Achievements in the area of automated ultrasonic control of quality of rails, solid-rolled wheels and tyres, wheels magnetic powder crack detection, carried out at JSC EVRAZ NTMK. The 100% nondestructive control is accomplished by automated control in series at two ultrasonic facilities RWI-01 and four facilities УМКК-1 of magnetic powder control, installed into the exit control line in the wheel-tyre shop. Diagram of location, converters displacement and control operations in the process of control at the facility RWI-01 presented, as well as the structural diagram of the facility УМКК-1. The automated ultrasonic control of rough tyres is made in the tyres control line of the wheel-tyre shop at the facility УКБ-1Д. The facility enables to control internal defects of tyres in radial, axis and circular directions of radiation. Possibilities of the facility УКБ-1Д software were shown. Nondestructive control of railway rails is made at two facilities, comprising the automated control line of the rail and structural shop. The УКР-64Э facility of automated ultrasonic rails control is intended to reveal defects in the area of head, web and middle part of rail foot by pulse echo-method with a immersion acoustic contact. The diagram of rail P65 at the facility УКР-64Э control presented. To reveal defects of the macrostructure in the area of rail head and web by mirror-shadow method, an ultrasonic noncontact electromagnetic-acoustic facility is used. It was noted, that implementation of the 100% nondestructive control into the technology of rolled stuff production enabled to increase the quality of products supplied to customers and to increase their competiveness.

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