STUBBLE FIELD PLANT COMMUNITIES OF THE MAZOWIECKI LANDSCAPE PARK

Teresa Skrajna, Maria Ługowska 190 Class: Isoëto-Nanojuncetea Br.-Bl.et R. Tx. 1943 Order: Cyperetalia fusci (Klika 1935) Müller-Stoll et Pietsch 1961 Alliance: Radiolion linoidis (Rivas Goday 1961) Pietsch 1965 3. Association: Centunculo-Anthoceretum punctati (Koch 1926) Moor 1936 a. typical variant b. variant with Hypericum humifusum c. variant with Centaurium pulchellum Characteristics of the distinguished associations and communities Digitarietum ischaemi R. Tx. et Prsg (1942) 1950 Patches of Digitarietum ischaemi were noted in rye stubble fields on the poorest sandy soils of very weak and weak rye complex as well as cereal-fodder weak complex. The patches occurred equally frequently within the area of the Park and in its agricultural buffer zone. The association was characterized by 30 relevés, of which 10 represent the typical variant, 10 – the variant with Anthoxanthum aristatum, and 10 – the variant with Polygonum hydropiper (Table 1). The typical variant patches were noted in the poorest habitats from among all those occupied by that association. The characteristic species – Digitaria ischaemum – reached the highest cover index there. Phytocoenoses of the variant with Anthoxanthum aristatum were floristically poorest. The average plant cover was only 20%. The wet variant patches were recorded in stubble fields situated in local depressions, usually on periodically excessively wet areas. These phytocoenoses were distinguishable by the mass occurrence of hygrophilous weeds, e.g.: Polygonum hydropiper and Bidens tripartita. In total, 65 species were noted in all the plots of this association (38 in the typical variant, 28 in the variant with Anthoxanthum aristatum, and 57 in the variant with Polygonum hydropiper). The average number of species per relevé varied from 11 in the patches of the variant with Anthoxanthum aristatum to 21 in the wet variant. Community with Setaria pumila The community was frequently recorded in the stubble fields of the Mazowiecki Landscape Park and its buffer zone (Table 2). It was distinguishable by the mass occurrence of Setaria pumila and a high proportion of acidophilous weeds, e.g. Spergula arvensis, Scleranthus annuus and Anthemis arvensis. A low percentage of the species characteristic of the PanicoSetarion alliance was also noted. The typical form of the community was observed in the whole study area, mainly in rye stubble fields on poor sandy soil of weak rye complex. Patches with the mass occurrence of Aphanes arvensis were noted only in stubble fields situated in the following localities: Kąty, Skorupy, Augustówka, Łukowiec, and Gózd. Patches of this community were developing on sandy muck and silt-peaty soils of periodically excessively wet cerealfodder weak complex, which resulted in a high proportion of hygrophilous weed species, e.g. Polygonum hydropiper, Polygonum amphibium, Plantago intermedia, Gnaphalium uliginosum. In this area, the impoverished association of Aphano-Matricarietum was observed in cereal crops. Echinochloo-Setarietum Krusem. et Vlieg. (1939) 1940 Patches of the association Echinochloo-Setarietum were observed most frequently in unploughed cereal stubble fields of the studied area (Table 3). Among the characteristic species, Echinochloa crus-galli occurred in large numbers, Raphanus raphanistrum was noted less frequently. Patches of this phytocoenosis developed in various trophic and moist conditions. Patches of the typical variant were usually recorded on good rye complex soils. They were floristically poorest among all identified variants of the association (on average, 21 species in one relevé) and marked by the highest cover of Echinochloa crus-galli. In a close vicinity of buildings, on more fertile nitrogen-rich soils classified as good and very good rye complex, there were noted patches of the variant with the abundant occurrence of Galinsoga parviflora. A large proportion of weeds characteristic of the Polygono-Chenopodion alliance, which includes species with high nutrient demands, e.g.: Veronica persica, Galinsoga ciliata and Chenopodium polyspermum, was observed in these phytocoenoses. The floristically richest patches of this association, classified as the variant with Bidens tripartita, were observed in stubble fields on soils developed from clayey soils and common dusts, classified as good and very good rye complex and strong cereal-fodder complex. They were distinguishable by the mass occurrence of hygrophilous weed species, e.g. Bidens tripartita, Plantago intermedia, Polygonum hydropiper, Stachys palustris, and Sagina procumbens. This variant comprised 92 taxa, on average 30 species in one relevé. Community with Veronica agrestis Patches of the community with Veronica agrestis were noted very seldom in stubble fields of the Mazowiecki Landscape Park and its buffer zone. The species characteristic of the Polygono-Chenopodion alliance, with high trophic and pH requirements, predominated in their floristic composition (Table 4). Apart from Veronica agrestis occurring in large numbers, a few other taxa occurred with a high constancy and cover, e.g. Matricaria maritima subsp. inodora, Stubble field plant communities of the Mazowiecki Landscape Park 191 Fig. 1. Investigated area a – borders of the Landscape Park; b – borders of the protected zone; c – building grounds d – forest complexes; e – localities, inwestigated areas 1 – Anielinek, 2 – Antoninek, 3 – Aleksandrówka, 4 – Augustówka, 5 – Bąki, 6 – Bocian, 7 Brzezinka, 8 – Całowanie, 9 – Celestynów, 10 – Chrosna, 11 – Chrząszczówka, 12 – Człekówka, 13 – Dąbrowa, 14 – Dąbrówka, 15 – Dyzin, 16 – Glina, 17 – Gózd, 18 – Grabianka, 19 – Jatne, 20 Janów, 21 – Jaźwiny, 22 – Karpiska, 23 – Kąciki, 24 – Kąty, 25 – Kominki, 26 – Kozłówka, 27 – Łukowiec, 28 – Ocznia, 29 – Osieck, 30 – Ostrowik, 31 – Podbiel, 32 – Pogorzel, 33 – Ponurzyca, 34 – Radzyń, 35 – Regut, 36 – Rosłańce, 37 – Rudnik, 38 – Stara Wieś, 39 – Stara Wieś II, 40 – Skorupy, 41 – Szatany, 42 – Tabor, 43 – Warszówka, 44 – Zabieżki, 45 – Zawada Teresa Skrajna, Maria Ługowska 192 T ab le 1 D ig it ar ie tu m is ch ae m i R . T x. e t P rs g (1 94 2) 1 95 0 V ar ia nt ty pi ca l w ith A nt ho xa nt hu m a ri st at um w ith P ol yg on um h yd ro pi pe r R el ev é no . i n ta bl e 1 2 3 4 5 6 7 8 9 10 M e a n n u m b e r o f s p e c i e s p e r r e l e v é 11 12 13 14 15 16 17 18 19 20 M e a n n u m b e r o f s p e c i e s p e r r e l e v é 21 22 23 24 25 26 27 28 29 30 M e a n n u m b e r o f s p e c i e s p e r r e l e v é R el ev é no . i n fi el d 28 5 28 6 29 2 28 4 30 7 31 7 33 0 25 5 25 9 23 3 29 8 32 6 36 8 25 2 24 1 26 4 23 1 24 0 30 9 31 0 29 3 29 6 29 8 26 5 27 1 26 7 23 2 22 1 22 2 23 0 D at e: m on th 8 8 9 8 8 9 8 8 9 9 8 8 8 8 9 9 7 8 8 9 7 7 8 8 8 9 8 7 8 8 ye ar .0 5 .0 3 .0 5 .0 4 .0 4 .0 5 .0 4 .0 3 .0 7 .0 6 .0 7 .0 6 .0 3 .0 5 .0 7 .0 6 .0 4 .0 5 .0 7 .0 6 .0 4 .0 5 .0 3 .0 7 .0 6 .0 3 .0 5 .0 3 .0 7 .0 6 L oc at io n 32 32 34 31 35 38 42 10 11 3 39 40 21 9 6 17 3 5 36 36 7 38 39 19 22 21 3 1 1 2 W ee d co ve r in % 80 10 0 70 85 60 45 45 40 50 70 60 80 70 70 55 70 75 90 50 35 70 60 50 75 60 85 85 50 40 40 So il un it 7 B w p l 7 B w p l 6 B w p s 7 B w p l 6 B w p s 7 B w p l 6 B w p s 6 B w p s 7 B w p l 7 B w p l 7 B w p l 6 M p g l . p l 7 B w p l 7 B w p l 7 B w p l 6 B w p g l : g l 7 B w p l 7 B w p l 7 B w p l 7 B w p l 6 F p g l . p l 6 M p g l . p l 9 M p g l : g l 6 B w p g l . p l 9 B w p g l 9 B w p g l : g l 9 B w p g l : g l 9 M p g l : g l 9 B w p g l 9 B w p g l : g l N um be r of w ee ds pe r re le vé 18 17 11 14 13 11 11 13 14 12 13 13 10 8 11 12 12 11 10 8 13 11 26 23 24 19 22 18 21 16 24 17 21 S D S D S D I. C h. D ig it ar ie tu m is ch ae m i D ig it ar ia is ch ae m um 3 4 3 3 2 2 2 3 3 1 V 31 75 3 3 3 2 2 2 1 4 1 1 V 24 25 1 3 3 3 3 2 2 1 1 1 V 20 50 II . C h. D . P an ic oSe ta ri on R um ex a ce to se ll a 2 2 1 2 3 1 1 + + 3 V 24 45 + + + + 2 1 2 2 IV 61 5 1 + 1 2 1 + + IV 35 5 Sc le ra nt hu s an nu us + + + 1 1 + + + 1 V 21 0 + + 1 + 1 1 + + + V 21 0 + + + + II 40 Sp er gu la a rv en si s + + + + II I 40 + + + + + II I 50 3 + + + + 1 1 + + + V 54 5 Se ta ri a vi ri di s + + + + 1 + II I 10 0 + I 10 1 I 50 Se ta ri a pu m il a 1 + + II 70 + + + + II 40 + + + II 30 R ap ha nu s ra ph an is tr um r I 10 + + + + II 40 + + + + II I 40 II I. D . v ar w it h P ol yg on um h yd ro pi pe r P ol yg on um h yd ro pi pe r + + I 20 1 1 + 1 1 3 3 2 2 1 V 13 70 B id en s tr ip ar ti ta + 1 1 2 1 + + 1 + V 41 5 G na ph al iu m u li gi no su m + + + + + + II I 60 P la nt ag o in te rm ed ia + + + + + + II I 60 R or ip pa s yl ve st ri s + + + + + II I 50 R or ip pa a us tr ia ca + + + + + II I 50 Stubble field plant communities of the Mazowiecki Landscape Park 193 Ju nc us b uf on iu s + + + + + II I 50 P ot en ti ll a an se ri na + + + + II I 40 Sp er gu la ri a ru br a + I 10 + + + + + II I 50 IV . D . v ar A nt ho an th um ar is ta tu m A nt ho xa nt hu m a ri st at um + r + I 20 2 3 2 3 1 2 2 1 1 1 V 16 50 + + + + II 40 V . C h. S te lla ri et ea m ed ia e A rn os er is m in im a 1 + + + + 1 1 + + 1 V 26 0 + 1 + II 70 V io la a rv en si s + + + + + II I 50 + + + + + + + IV 70 + + + + II 40 A nt he m is a rv en si s 1 + + + + + II I 10 0 + + + + + II I 50 + + + II 30 F al lo pi a co nv ol vu lu s + + + + + II I 50 + + + + + + II I 60 + + + + + II I 50 C on yz a ca na de ns is + 2 + + + + II I 22 5 + + + II 30 + + + + + + + + IV 80 G al eo ps is te tr ah it + + + + II 40 + + + + + + II I 60 + + + + II 40 R hi na nt hu s se ro ti nu s + + + + II 40 V ic ia v il lo sa + + + II 30 C en ta ur ea c ya nu s + + + + + + II I 60 + + + + + + + IV 70 C he no po di um a lb um + I 10 + + + + + II I 50 P ol yg on um a vi cu la re + + + + + + II I 60 + + + + + II I 50 V I. C om pa ni on s pe ci es A ch il le a m il le fo li um + + + + + II I 50 + + + + + + + IV 70 + + + + + + II I 60 E ly m us r ep en s 1 + + II 70 + + + II 30 G al eo ps is la da nu m + + + II 30 P la nt ag o la nc eo la ta + + + + II 40 + +


INTRODUCTION
Communities developing in unploughed stubble fields are distinguishable by their specific floristic composition.A few different groups of plants are found there: the remains of cereal agrophytocoenoses, weed species typical for root crops as well as taxa characteristic of ruderal and semi-natural communities (especially meadow ones).The species composition of these heterogeneous communi- Patches of Digitarietum ischaemi were noted in rye stubble fields on the poorest sandy soils of very weak and weak rye complex as well as cereal-fodder weak complex.The patches occurred equally frequently within the area of the Park and in its agricultural buffer zone.The association was characterized by 30 relevés, of which 10 represent the typical variant, 10 -the variant with Anthoxanthum aristatum, and 10 -the variant with Polygonum hydropiper (Table 1).The typical variant patches were noted in the poorest habitats from among all those occupied by that association.The characteristic species -Digitaria ischaemum -reached the highest cover index there.Phytocoenoses of the variant with Anthoxanthum aristatum were floristically poorest.The average plant cover was only 20%.The wet variant patches were recorded in stubble fields situated in local depressions, usually on periodically excessively wet areas.These phytocoenoses were distinguishable by the mass occurrence of hygrophilous weeds, e.g.: Polygonum hydropiper and Bidens tripartita.In total, 65 species were noted in all the plots of this association (38 in the typical variant, 28 in the variant with Anthoxanthum aristatum, and 57 in the variant with Polygonum hydropiper).The average number of species per relevé varied from 11 in the patches of the variant with Anthoxanthum aristatum to 21 in the wet variant.

Community with Setaria pumila
The community was frequently recorded in the stubble fields of the Mazowiecki Landscape Park and its buffer zone (Table 2).It was distinguishable by the mass occurrence of Setaria pumila and a high proportion of acidophilous weeds, e.g.Spergula arvensis, Scleranthus annuus and Anthemis arvensis.A low percentage of the species characteristic of the Panico-Setarion alliance was also noted.The typical form of the community was observed in the whole study area, mainly in rye stubble fields on poor sandy soil of weak rye complex.Patches with the mass occurrence of Aphanes arvensis were noted only in stubble fields situated in the following localities: Kąty, Skorupy, Augustówka, Łukowiec, and Gózd.Patches of this community were developing on sandy muck and silt-peaty soils of periodically excessively wet cerealfodder weak complex, which resulted in a high proportion of hygrophilous weed species, e.g.Polygonum hydropiper, Polygonum amphibium, Plantago intermedia, Gnaphalium uliginosum.In this area, the impoverished association of Aphano-Matricarietum was observed in cereal crops.

Echinochloo-Setarietum Krusem. et Vlieg. (1939) 1940
Patches of the association Echinochloo-Setarietum were observed most frequently in unploughed cereal stubble fields of the studied area (Table 3).Among the characteristic species, Echinochloa crus-galli occurred in large numbers, Raphanus raphanistrum was noted less frequently.Patches of this phytocoenosis developed in various trophic and moist conditions.Patches of the typical variant were usually recorded on good rye complex soils.They were floristically poorest among all identified variants of the association (on average, 21 species in one relevé) and marked by the highest cover of Echinochloa crus-galli.
In a close vicinity of buildings, on more fertile nitrogen-rich soils classified as good and very good rye complex, there were noted patches of the variant with the abundant occurrence of Galinsoga parviflora.A large proportion of weeds characteristic of the Polygono-Chenopodion alliance, which includes species with high nutrient demands, e.g.: Veronica persica, Galinsoga ciliata and Chenopodium polyspermum, was observed in these phytocoenoses.
The floristically richest patches of this association, classified as the variant with Bidens tripartita, were observed in stubble fields on soils developed from clayey soils and common dusts, classified as good and very good rye complex and strong cereal-fodder complex.They were distinguishable by the mass occurrence of hygrophilous weed species, e.g.Bidens tripartita, Plantago intermedia, Polygonum hydropiper, Stachys palustris, and Sagina procumbens.This variant comprised 92 taxa, on average 30 species in one relevé.

Community with Veronica agrestis
Patches of the community with Veronica agrestis were noted very seldom in stubble fields of the Mazowiecki Landscape Park and its buffer zone.The species characteristic of the Polygono-Chenopodion alliance, with high trophic and pH requirements, predominated in their floristic composition (Table 4).Apart from Veronica agrestis occurring in large numbers, a few other taxa occurred with a high constancy and cover, e.g.Matricaria maritima subsp.inodora,  ,20 Janów,45

Radiolion linoidis
Centunculus minimus    In cereal stubble fields of the Mazowiecki Landscape Park and its buffer zone, patches of the association dominated by small therophytes and few mosses were rarely noted (Table 5).They were mainly recorded in local depressions and furrows.These small-area phytocoenoses developed in various habitat conditions that resulted in their floristic diversity and, as a consequence, in the division into lower syntaxa (variants).Patches of the variant with Hypericum humifusum were distinguishable by a low cover of Centunculus minimus -the species characteristic of this association and -the mass occurrence of Hypericum humifusum (differential species).A high proportion of acidophilus species was also observed, e.g.Spergula arvensis, Rumex acetosella, Digitaria ischaemum, Scleranthus annuus, and Anthemis arvensis.The community was noted on soils developed from muck sands classified as weak rye and weak cereal-fodder complexes.
Patches of the typical variant were noted in stubble fields on compact soils included in the strong cereal-fodder complex.They were characterized by the largest cover of Centunculus minimus and the numerous occurrence of the species characteristic for higher syntaxonomic units: Radiola linoides, Peplis portula, Plantago intermedia, Juncus bufonius, Juncus capitatus and Sagina procumbens.Moreover, their physiognomy was highly affected by strongly expanding, deep-root, hygrophilous species, e.g.Polygonum hydropiper, Bidens tripartita, Polygonum amphibium, Stachys palustris, Veronica serpyllifolia, as well as by nitrophilous species, e.g.Matricaria maritima subsp.inodora, Chenopodium album, Chenopodium polyspermum, Lamium purpureum,Euphorbia helio-scopia, Solanum nigrum, Fumaria officinalis.Patches with the mass occurrence of Centaurium pulchellum were observed in similar habitats, differing in a higher concentration of CaCO 3 .Apart from the numerous occurrence of nitrophilous weeds, they were marked by the highest cover of moderately calciphilous taxa, e.g.: Consolida regalis, Aethusa cynapium, Melandrium album, Chaenorhinum minus, as well as the occurrence of Lathyrus tuberosus and Kickxia elatine -species not recorded in other stubble field phytocoenoses under investigation.
Centunculo-Anthoceretum punctati was floristically the richest association from among the identified syntaxa, comprising 114 species.The average number of species varied from 31 in the variant with Hypericum humifusum to 34 in the variant with Centaurium pulchellum.

DISCUSSION
Cereal stubble fields situated in the agricultural areas of the Mazowiecki Landscape Park and its buffer zone are frequently left unploughed.Floristically rich communities developing there reflect different trophic and moist habitat conditions.Data on high floristic biodiversity of stubble field communities have been reported from many regions of  2006b).Patches of the community with Setaria pumila, the form with Aphanes arvensis, were also rarely noted.They were distinguishable by the mass occurrence of Aphanes arvensis, the species found outside its geographical range.On the other hand, the typical form of the community with Setaria pumila was frequently noted in the studied area.This community is considered to be com- ties is closely related to habitat conditions (T r ą b a , 1993; S k r a j n a and S k r z y c z y ń s k a , 2002; R z y m o w s k a and S k r z y c z y ń s k a , 2006a,b).Favourable development conditions, which predominate in stubble fields, stimulate the growth of weeds that flower and fruit abundantly, enriching soil-seed reserves (P a w ł o w s k i et al. 1970; T r ą b a and Class: Isoëto-Nanojuncetea Br.-Bl.etR. Tx. 1943 Order: Cyperetalia fusci (Klika 1935) Müller-Stoll et Pietsch 1961 Alliance: Radiolion linoidis (Rivas Goday 1961) Pietsch 1965 3. Association: Centunculo-Anthoceretum punctati (Koch 1926) Moor 1936 a. typical variant b. variant with Hypericum humifusum c. variant with Centaurium pulchellum Characteristics of the distinguished associations and communities Digitarietum ischaemi R. Tx. et Prsg (1942) 1950

Fig. 1 .
Fig. 1.Investigated area a -borders of the Landscape Park; b -borders of the protected zone; c -building grounds d -forest complexes; e -localities, inwestigated areas 1 -Anielinek, 2 -Antoninek, 3 -Aleksandrówka, 4 -Augustówka, 5 -Bąki, 6 -Bocian, 7 -Brzezinka, 8 -Całowanie, 9 -Celestynów, 10 -Chrosna, 11 -Chrząszczówka, 12 -Człekówka, 13 -Dąbrowa, 14 -Dąbrówka, 15 -Dyzin, 16 -Glina, 17 -Gózd, 18 -Grabianka, 19 -Jatne, 20 Janów, 21 -Jaźwiny, 22 -Karpiska, 23 -Kąciki, 24 -Kąty, 25 -Kominki, species: III -Phragmites australis 9(+), 13(+), 19(+), 20(+); Mentha arvensis 3(+); Rorippa palustris 14(+), 23(+), 29(+); Rorippa amphibia 3(1); Poland and from abroad (J ę d r u s z c z a k , 1990; P a w ł o w s k i and J ę d r u s z c z a k , 1986; W n u k , 1988; P a w ł o w s k i et al. 1994; T r ą b a , 1991, 1993; W a r c h o l i ń s k a , 1994; S k r a j n a and S k r z y c z y ń s k a , 2002; R z y m o w s k a and S k r z y c z y ń s k a , 2006a,b; D i e r s c h k e , 2010).Extensive agriculture and diversified habitat conditions in the studied area have resulted in great internal differentiation of the developing communities.The floristically richest patches of the Centunculo-Anthoceretum punctati association, rarely recorded in this region and considered to be in danger of extinction in Poland (Ć w i k l i ń s k i , 1982; G ł o w a c k i et al. 2003; T r ą b a , 1993; W a r c h o l i ń s k a , 1988; S k r a j n a , 2006), were seldom observed within the Park area.Phytocoenoses of another floristically rich community with Veronica agrestis were also only sporadically noted in the studied stubble fields.The occasional occurrence of these phytocoenoses results from a low proportion of fertile soils in the study area.In their floristic composition, these plots resemble the phytocoenoses classified as the communities with Veronica persica, frequently occurring in stubble fields of the Lublin region (J ę d r u s z c z a k et al. 1989), southeastern Poland (T r ą b a , 1991; T r ą b a , 1993), the western part of the Siedlce region (S k r z y c z y ń s k a and R z y m o w s k a , 1997), the Kałuszyńska Upland (S k r a j n a and S k r z y c z y ń s k a , 2005), as well as the Podlaski Przełom Bugu mesoregion (R z ym o w s k a and S k r z y c z y ń s k a , mon and species diversified in stubble fields in other regions of Poland (P a w ł o w s k i and T r ą b a , 1987; T r ą b a , 1991, 1993; J ę d r u s z c z a k et al. 1990; S k r a j n a and S k r z y c z y ń s k a , 2002; R z ym o w s k a and S k r z y c z y ń s k a , 2006b).Echinochloo-Setarietum is considered the most common and, floristically, most diversified weed community of root crops in Poland and abroad.In the studied area, this association was also frequently noted in stubble fields on fertile soils, whereas in the poorest habitats the Digitarietum ischaemi association was predominant (W n u k , 1988; J ę d r u s z c z a k et al., 1989; A n i o ł -K w i a t k o w s k a , 1990; J ę d r u s z c z a k , 1990b; P a w ł o w s k i et al. 1991; T r ą b a , 1993; W a r c h o l i ń s k a , 1994; S k r z y c z y ń s k a and R z y m o w s k a , 1997; M o c h n a c k y , 2000; S kr a j n a and S k r z y c z y ń s k a , 2002; S k r a j n a and S k r z y c z y ń s k a , 2005; R z y m o w s k a and S k r z y c z y ń s k a , 2006, 2006a; P i n k e and P a l , 2008).The frequent occurrence of the floristically poorest variant of the association with Anthoxanthum aristatum within the Park area is also noteworthy.The mass occurrence of Anthoxanthum aristatum in the patches affects the floristic composition of the phytocoenoses, which results in significant degeneration of the community.A similar process was previously observed in the patches of Arnoserido-Scleranthetum, var. with Anthoxanthum aristatum, in cereal crops (S k r a j n a et al., 2009).Information on the impoverishment of communities due to the intensive occurrence of Anthoxanthum aristatum was also reported by W a r c h o l i ń s k a (1994) from Piotrków Plateau.CONCLUSIONS 1.Three plant associations classified into lower syntaxonomic units (variants): Digitarietum ischaemi, Echinochloo-Setarietum, Centunculo-Anthoceretum punctati, and two communities with Setaria pumila and with Veronica agrestis.were identified in the unploughed stubble fields of the Mazowiecki Landscape Park.2. Well-developed patches of the association Centunculo-Anthoceretum punctati and the community with Veronica agrestis were seldom noted in the studied stubble fields.3. The associations Echinochloo-Setarietum on fertile soils and Digitarietum ischaemi in poor habitats were commonly observed.4. Patches of the community Setaria pumila with Aphanes arvensis were sporadically noted in the south-eastern part of the Park.Zbiorowiska roślinne ściernisk Mazowieckiego Parku Krajobrazowego S t r e s z c z e n i e W pracy przedstawiono charakterystykę zbiorowisk wykształcających się na niezaoranych ścierniskach Mazowieckiego Parku Krajobrazowego i w jego rolniczej otulinie.Najczęściej notowanym i zróżnicowanym florystycznie był zespół Echinochloo-Setarietum, w którym wyróżniono wariant typowy, wariant z Galinsoga parviflora i wariant z Bidens tripartita.Częstymi fitocenozami badanego terenu były również płaty Digitarietum ischaemi porastające ścierniska na najuboższych siedliskach.Rzadko i na niewielkich powierzchniach, na glebach żyznych spotykano bogate florystycznie płaty zbiorowiska z Veronica agrestis.Gleby okresowo nadmiernie uwilgotnione porastały rzadko spotykane i najbogatsze gatunkowo fitocenozy Centunculo-Anthoceretum punctati.Jedynie w południowo-wschodniej części Parku występowały pojedyncze płaty zbiorowiska z Setaria pumila postać z Aphanes arvensis.

. Ch.D. Panico-Setarion
Comments: numbers after species names inform about the relevé number in the table.S -phytosociological constancy, D -coverage index cd.Table1