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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Long-term crop rotation and continuous cropping effects on soil chemical properties

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Kostrzewska M. K., Jastrzebska M., Marks M., Jastrzebski W. P.
Journal of Elementology
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2022
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tom 27
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nr 2
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Weed species diversity in organic and integrated farming systems

100%
Jastrzebska M., Jastrzebski W. P., Holdynski C., Kostrzewska M. K.
Acta Agrobotanica
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2013
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tom 66
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nr 3
Phytosociological data were collected in 1994–1996 in plots (relevés) at the Research Station for Organic Farming and Conservation Breeding of the Polish Academy of Sciences in Popielno included in a large-area experiment conducted according to the concept and method proposed by Prof. S. Nawrocki. In a four-field crop rotation (root crops – spring barley undersown with red clover and grasses – red clover/grass mixture – winter triticale), each field was divided into two management units, organic and integrated. Data were collected in relevés by the Braun-Blanquet method, each year at the peak of the growing season. Weed abundance (% cover) in cultivated fields and the number of weed species (species richness) in crops were determined, which provided a basis for calculating the Shannon- -Wiener indices of species diversity and evenness, and the Rényi profiles. The qualitative (species) and quantitative structure of weed communities was compared using the Sorensen index. A total of 115 weed taxa (species, subspecies and varieties) were identified in the examined agro-phytocenoses. Echinochloa crus-galli, Chenopodium album, Matricaria maritima subsp. inodora, Capsella bursa-pastoris, Thlaspi arvense and Stellaria media were the most abundant. Weed infestation was slightly higher in the organic farming system than in the integrated system. Organic farming contributed to higher weed species diversity in root crops, red clover/grass mixtures and winter triticale. Weed species richness was reduced in red clover/grass stands, while root crops and – to a lesser degree – spring barley undersown with red clover and grasses decreased weed species diversity. The species composition and in particular the quantitative structure of weeds were affected by crop species and cultivation regime rather than by the farming system. Weed communities of crops grown under organic and integrated farming systems were more similar with regard to species composition than the quantitative structure.
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Taxonomic diversity and distinctness indices in assessment of weed communities

100%
Jastrzebska M., Wanic M., Jastrzebski W. P., Kostrzewska M. K.
Acta Agrobotanica
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2011
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tom 64
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nr 4
This paper contains an analysis of taxonomic weed biodiversity in the cultivation of spring barley in the period of 1990- 2004, grown in crop rotation after potato with a 25% share of this cereal (potato – spring barley – field pea – winter triticale) as well as in crop rotation with its 75% share (potato – spring barley – spring barley – spring barley) in which barley was grown once and twice after the same barley crop. No weed control was used in the present experiment. Every year in the spring (at full emergence of the cereal crop) and before harvest, the species composition and the numbers of individual weed species were determined, as well as weed biomass before harvest. On this basis, the taxonomic diversity and distinctness indices were calculated. Potato/barley crop rotation with a 25% share of this cereal and growing spring barley once and twice after the same barley crop did not differentiate taxonomic weed biodiversity. However, it was positively correlated with rainfall abundance during the growing season and negatively correlated with mean temperature. The taxonomic diversity indices were positively correlated with species richness and species diversity, whereas the taxonomic distinctness indices did not generally show any relationship with these measures. Spring barley grain yield did not depend on taxonomic biodiversity of weed communities.
4

Species diversity in grassland communities under different habitat conditions

100%
Jastrzebska M., Szarejko T., Holdynski C., Jastrzebski W. P.
Polish Journal of Natural Sciences
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2009
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tom 24
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nr 1
43-59
Two hundred species of vascular plants were identified in grasslands on the Popielno Peninsula, in the part used for agricultural purposes. Species diversity in plant communities, measured by the Shannon-Wiener index, was found to depend on soil type, land use type and phytosociological affiliation. Greater species diversity was observed in communities that developed on mineral soils, are used as pastures, and belong to the class Molinio-Arrhenetheretea. The biodiversity of grassland communities on the Popielno Peninsula is affected by habitat conditions. The relationship between vegetation biodiversity and habitat quality is difficult to grasp due to its multidimensional character. The methods of multivariate statistics may prove useful in this respect.
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Plenność Thlaspi arvense L. w łanach czterech roślin uprawnych

100%
Jastrzebski W. P., Ziolkowska K., Holdynski C., Jastrzebska M.
Fragmenta Agronomica
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2013
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tom 30
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nr 2
6

Assessment of grassland habitats on the Popielno Penisula by phytoindication methods

100%
Jastrzebska M., Szarejko T., Holdynski C., Jastrzebski W. P.
Polish Journal of Natural Sciences
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2007
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tom 22
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nr 4
557-573
Grassland habitats located in a part of the Popielno Peninsula that is used for agricultural purposes (Popielno and Wierzba), under conditions of spatial isolation, were evaluated based on phytosociological relevés. A phytoindication method based on ecological indicator values, developed by ZARZYCKI et al. (2002), and simple statistical methods were employed in the study. The analyzed grasslands are managed as hay meadows and pastures. Vegetation is dominated by sown grasses, primarily Dactylis glomerata, Poa pratensis and Festuca rubra. The local plant communities belong to the classes Molinio-Arrhenetheretea and Phragmitetea. A total of 200 species of vascular plants were identified in the research area, including 197 species described by ZARZYCKI et al. (2002) with the use of indicator values. Grassland vegetation in Popielno and Wierzba prefers moderate light and temperature conditions. On a 5-point scale, the values of light and temperature reached 3.47 to 4.65 and 3.48 to 3.99, respectively. The soils in the area are fertile, nutrient-abundant (trophy of 3.32 to 4.20) and neutral (acidity of 3.56 to 4.79). Soil moisture content in the examined habitats ranged from 2.83 to 5.89 on a 6-point scale.
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