Jolanta Jankowska

EFFECT OF DIFFERENT CONCENTRATIONS OF KELPAK BIOREGULATOR ON THE FORMATION OF ABOVE-GROUND BIOMASS COCKSFOOT

Studies with growing cocksfoot (cv. Amila) were performed in polyurethane ring with a diameter of 36 cm and a height of 40 cm, which were dug to a depth of 30 cm and filled with soil material. As the experimental factor the trade name of bioregulator Kelpak SL was used, which includes natural plant hormones (auxin and cytokinin). The following aqueous solutions of growth regulator were used: 20, 40, and 60% and control (no preparation). Kelpak were applied to all three regrowth in the form of spray at a dose of 3cm 3 •ring -1 in the shoots elongation phase of the grass. The full use of experimental objects was in 2011-2012. At that time, the detailed study include aboveground bio[%]

THE INITIAL GROWTH AND DEVELOPMENT OF POA PRATENSIS UNDER THE ALLELOPATHIC INFLUENCE OF TARAXACUM OFFICINALE

This experiment was carried out in laboratory conditions. The aim of this work was estimating allelopathic potential of Taraxacum officinale on seeds germination and initial growth of Poa pratensis. In the experiment different concentration of soil’s and plant’s water solution obtained from common dandelion were employed. The inhibition of germination energy of Poa pratensis under the influence of plant extracts produced from roots and leaves of Taraxacum officinale was found. Germination availability was inhibited in a higher degree by extracts prepared from the leaves than the roots of Taraxacum officinale . Higher concentrations of all solutions of both the soil and the plant inhibited the length of seending of Poa pratensis.

THE ALLELOPATHIC INFLUENCE OF TARAXACUM OFFICINALE ON THE INITIAL GROWTH AND DEVELOPMENT OF FESTUCA RUBRA L.

Common dandelion (Taraxacum officinale F.H. Wigg) is perennial plant often stepping out in very large quantity in the sward of natural meadows. This species expands, enlarging its population very quickly. In the literature there is the lack of data related to influences of the common dandelion on plants growing in it’s neighbourhood. It is also unknown why this species creates large clusters. It may compete with different plants through the allelopatic influence. Therefore, the aim of this work was to test of the influence of water extracts from leaves and from the roots of common dandelion (Taraxacum officinale ) as well as soil extracts from the radicular layer of this species on the germination of the seeds and the initial growth of Red fescue (Festuca rubra L.). The investigative material came from leaves and roots of Taraxacum officinale and soil coming from the radicular layer of this species. It was applied most often in biotest experiments on germination. Red fescue was the tested plant. The germination energy of red fescue was the most braked through the plant extracts prepared from roots and leaves of Taraxacum officinale .

PRINCIPAL COMPONENT ANALYSIS AND CLUSTER ANALYSIS IN MULTIVARIATE ASSESSMENT OF WATER QUALITY

This paper deals with the use of multivariate methods in drinking water analysis. During a five-year project, from 2008 to 2012, selected chemical parameters in 11 water supply networks of the Siedlce County were studied. Throughout that period drinking water was of satisfactory quality, with only iron and manganese ions exceeding the limits (21 times and 12 times, respectively). In accordance with the results of cluster analysis, all water networks were put into three groups of different water quality. A high concentration of chlorides, sulphates, and manganese and a low concentration of copper and sodium was found in the water of Group 1 supply networks. The water in Group 2 had a high concentration of copper and sodium, and a low concentration of iron and sulphates. The water from Group 3 had a low concentration of chlorides and manganese, but a high concentration of fluorides. Using principal component analysis and cluster analysis, multivariate correlation between the studied parameters was determined, helping to put water supply networks into groups according to similar water quality.

THE EFFECT OF HYDROTHERMAL CONDITIONS ON OATS YIELDS IN EAST-CENTRAL POLAND (1975–2005)

The objective of the work was to evaluate the effect of hydrothermal conditions on oats yields produced in east-central Poland. Hydrothermal conditions were determined based on the Sielianinov’s hydrothermal coefficient for nine IMGW (Institute of Meteorology and Water Management) stations located in the study area. The second data set consisted of oats yields compiled and published by the Main Statistical Office. Average yields as well as minimum and maximum yields were analysed. The relationship between oats yields and hydrothermal conditions was examined using a step-wise linear regression model. Correlation coefficients were negative in April and positive in June at all the stations. The relationships were confirmed by an analysis of regression equations. The regression equations also included coefficients for May and June which, however, were not statistically significant. Yield variation, described by regression equations of the dependence of oats yield on Sielianinov’s hydrothermal coefficient value was accounted for from 19 (Siedlce, Biała Podlaska) to 50% (Ostrołeka).

Impact on nano-gro stimulator on the seeds germination and growth kinetics of seedlings of selected grass and legumes species / Wpływ stymulatora nano-gro na kiełkowalność nasion oraz kinetykę wzrostu siewek wybranych gatunków traw oraz roślin motylkowatych

Abstract The experiment was established in the laboratory of Grassland Department and Landscape Architecture Development at the University of Natural Sciences and Humanities in Siedlce in 2012. The study was carried out in Petri dishes in triplicate. In the study five species of grasses were used: Festulolium brauni, Dactylis glomerata, Poa pratensis, Lolium perenne, Lolium multiflorum and two legume species: Trifolium pratense and Medicago sativa. Nano-Gro stimulator was used as a study factor. The obtained results showed a significant effect of the used stimulator on the germination energy, and a varied effect of the growth of grasses. Streszczenie Doświadczenie założono w laboratorium Katedry Łąkarstwa i Kształtowania Terenów Zieleni na Uniwersytecie Przyrodniczo-Humanistycznym w Siedlcach w roku 2012. Badanie przeprowadzono na szalkach Petriego w trzech powtórzeniach. Do badań użyto pięciu gatunków traw: Festulolium brauni, Dactylis glomerata, Poa pratensis, Lolium perenne, Lolium multiflorum oraz dwóch gatunków roślin motylkowych: Trifolium pratense, i Medicago sativa. Jako czynnika użyto stymulatora Nano-Gro. Otrzymane wyniki badań wykazały istotne oddziaływanie zastosowanego stymulatora na energię i zdolność kiełkowania, a także zróżnicowany wpływ na wzrost traw.

Effect of different concentrations of the Flordimex inhibitor on the shoot growth of perennial ryegrass and cocksfoot / Wpływ zróżnicowanego stężenia inhibitora Flordimex na przyrost pędów życicy trwałej i kupkówki pospolitej

Abstract In the pot experiment, conducted in a phytotron at a constant temperature 22°C and artificial lighting, the effectiveness of growth regulator concentrations on the inhibition of shoot growth of perennial ryegrass (Lolium perenne L.) and cocksfoot (Dactylis glomerata L.) was evaluated. In the study, a single growth inhibitor, with the trade name Flordimex SL 420 (active substance: ethephon, 2-chloroethylphosphonic acid), was applied in varying concentrations of 10%, 20% and 30%. In the experimental series, every 3 days in the period from 7 May to 6 June 2008, 10 measurements were performed. Empirical data were statistically evaluated. In the experiment with perennial ryegrass and cocksfoot, it was found that 30% of inhibitor concentration used inhibited the growth of shoots in the grass species studied.