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    Wyświetlanie 1-5 z 5
    Tytuł:
    Interaction of herbicides with mepiquat chloride and prohexadione calcium in winter wheat
    Autorzy:
    Miziniak, W.
    Matysiak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084852.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Apera spica-venti
    fenoxaprop-P-ethyl
    lodging
    phytotoxity
    pinoxaden
    yield
    stem height
    Opis:
    New solutions in plant protection applications are still highly desirable. Aiming at higher efficiency, environmental safety and profitability of production which, in addition to reducing the costs of the application of plant protection products, limits the destruction of soil structure combined use of agrochemicals seems to be one of the most important method in modern agriculture. In 2016 and 2017, the Plant Protection Institute – National Research Institute in Poznań, Poland, conducted field experiments on the possibility of combining two popular herbicides used to control monocotyledonous weeds: pinoxaden and fenoxaprop-P-ethyl, with a two-component plant growth and development regulator (mepiquat chloride and prohexadione calcium) on KWS Ozon winter wheat. The tested substances were applied at the BBCH 24 stage of winter wheat – herbicide only, and at the BBCH 31 stage – a mix of herbicides with a plant growth and development regulator. Regardless of the method of application of pinoxaden (herbicide only or mixed), high effectiveness of Apera spica-venti control was obtained in both years of the study. The mix of pinoxaden with mepiquat chloride and prohexadione calcium reduced the wheat crop height to a similar extent as separate application of the substances. The combined application of fenoxaprop-P-ethyl with mepiquat chloride improved the effectiveness of wheat crop height control. The method of application of the substances had no significant effect on winter wheat yield. Grain yields harvested from plots treated with the above substances were significantly higher than control only in the case of high weed infestation of winter wheat. The technological value of wheat grain depended on the year of study, while the method of application did not have a significant impact on the evaluated parameters.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 4; 494-502
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pentaclethra macrophylla Benth (African oil bean tree) and Parkia biglobosa Jacq (African locust bean tree): The Declining Giants of The Rainforest of Nigeria (The Northern Cross River Situation)
    Autorzy:
    Edu, E. A.
    Akwaji, P. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182827.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Parkia biglobosa
    Pentaclethra macrophylla
    abundance
    height
    stem diameter
    Opis:
    The abundance, stem diameter and height of Pentaclethra macrophylla Benth and Parkia biglobosa Jacq was assessed in each of the five Local Government Areas (Ogoja, Yala, Bekwarra, Obudu and Obanliku) of Northern Cross River State, Nigeria using the Modified Whittaker Method. Two forest communities were chosen from each Local Government Area, constituting 10 sites. In each site a 30 × 90 m plot was laid out in a spoke design and tree species present on the plots were recorded. A total of 3, 4, 5, 7, 4, 5, 6, 5, 12 and 10 stands for P. macrophylla and 4, 5, 5, 6, 6, 6, 4,5,8 and 8 stands for P. biglobosa were recorded in Gbogbu, Omulako, Aragban, Abeya, Aguomoh, Ukpah, Alege, Beteh, Bechevie and Sankwala forests respectively based on the sampled plots. Results of population percentage frequency, density and abundance of the two tree species varied across the study sites. The highest percentage frequency recorded for the tree species was 24% while the lowest was 12%. The highest population densities of 1.6666/ha, 1.3333/ha and 1/ha were recorded for the tree species while the lowest was 0.5/ha. Results of abundance show that the species were mostly rare with abundance ratio of (1.00≤AR≤2.99). Results of diameter class sizes of the tree species encountered in this study show that there were trees with mature trunk size than wildlings. Majority of the trees of P. biglobosa and P. macrophylla were in the diameter class of 20 – 29 cm and 30 – 39 cm respectively while results of the height class of trees shows that the minimum and maximum height was 10 -19 ft and 20 -29 ft respectively. This study shows that the trees of P. macrophylla and P. biglobosa were mostly rare and are declining; this could be as a result of over exploitation.
    Źródło:
    World Scientific News; 2017, 64; 127-138
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Juvenile wood volume and its proportion to stem volume vs. selected biometric features of Scots pine [Pinus sylvestris L.] trees
    Autorzy:
    Pazdrowski, W
    Tomczak, A.
    Kupczyk, G.
    Jelonek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/57743.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    breast height diameter
    tree height
    Scotch pine
    total stem volume
    determination coefficient
    juvenile wood
    Pinus sylvestris
    tree
    wood
    forest site type
    Opis:
    The aim of the study was to determine whether there is a correlation between breast height diameter, tree height and stem total volume of Scots pines, on the one hand, and volume and proportion of juvenile wood, on the other. The investigations comprised pure pine stands of the IInd, IIIrd, IVth and Vth age classes developed in conditions of fresh mixed coniferous forest. A distinct curvilinear correlation was found between volume and proportion of juvenile wood in tree stems and breast height diameter, height and stem total volume. Because of high values of determination coefficients (R2), which characterised the above-mentioned correlations, it seems appropriate to use these regularities to assess the quality of the timber raw material regarding the proportions of its volume and juvenile wood in stems of Scots pine trees.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2005, 74, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The TDP method of seed yield component analysis in grain legume breeding
    Autorzy:
    Golaszewski, J
    Idzkowska, M.
    Milewska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044235.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    breeding population
    path analysis
    stem
    treatment factor
    multiple regression
    yield component
    grain legume
    multivariate method
    seed
    two-dimensional partitioning method
    Vicia faba
    ontogenesis
    plant height
    fruiting node
    broad bean
    fodder pea
    Pisum sativum
    Opis:
    The results of plant breeding trials with populations of fodder pea strains and broad bean hybrids were the basis of consideration on the interrelationship between some traits - the yield structure elements. Developed by Eaton, a relatively new method of yield component analysis called the two-dimensional partitioning method (TDP) was applied to analyse the data. The method, which combines multiple regression and ANOVA, allows for concise tabular presentation and simple interpretation of the distribution of traits in one direction and the sources of variance according to ANOVA model in the other direction. Additionally, the interpretation of the results was supported by such standard statistical techniques as ANOVA, simple and multiple regression and path analysis. The main components of pea yielding were plant height and the number of pods per plant. Among the analysed characters of broad bean the number of nodes with pods on the main stem, which turned out to be the determinant of broad bean yielding, might be strongly affected by environmental conditions. The number of nodes with pods might be considered a selecting character of high potential yielding of broad bean genotypes.
    Źródło:
    Journal of Applied Genetics; 1998, 39, 4; 299-308
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Response of winter rapeseed to biostimulator application and sowing method. Part I. Field architecture elements
    Reakcja rzepaku ozimego na stosowanie biostymulatorów oraz sposób siewu. Cz. I. Elementy architektury łanu
    Autorzy:
    Sikorska, Anna
    Gugala, Marek
    Zarzecka, Krystyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2216783.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
    Tematy:
    Brasscia napus L.
    canopy lodging
    growth bioregulators
    plant density
    plant height
    sowing methods
    stem thickness at the base
    bioregulatory wzrostu
    grubość łodygi u nasady
    obsada roślin
    sposoby siewu
    ugięcie łanu
    wysokość roślin
    Opis:
    Background. In plant production, reaching high and good quality yields of cultivated plants is achieved mostly thanks to the ability to counteract the occurrence of stress and the amendment of damage caused by stress . The aim of the study was to determine the effect of the applied biostimulator types and the sowing methods on the filed architecture elements of three winter rapeseed cultivars. Material and methods. Field experiment was carried out in years 2013-2016 at the Agricultural Experimental Station in Zawady (52o 03' N; 22o 33' E), which is part of the University of Natural Sciences and Humanities in Siedlce, Poland. The experiment was carried out in a split-split-plot design in three repetitions. The studied factors were: I – winter rapeseed cultivar: Monolit (open-pollinated), PR44D06 (restored hybrid of semidwarf growth type), and PT205 (restored hybrid of traditional growth type); II – sowing method: row sowing (row spacing 22.5 cm, sowing density 60 seeds per $1 m^2$), single-seed sowing (row spacing 45.0 cm, sowing density 40 seeds per $1 m^2$); III – types of the applied biostimulators: control (no biostimulators), Tytanit®, Asahi®SL, and Silvit®. Results. Research demonstrated significant effect of the applied biostimulator types and the sowing method on the biometric plant characteristics before harvest, such as: plant density, plant height, stem thickness at the base, first productive branch placement. The greatest plant height was found in the restored morphotype of traditional growth type and in the open-pollinated cultivar, whereas the highest first productive branch placement in cultivar PT205. Restored hybrids PT205 and PR44D06 were characterized by greater stem thickness at the base in comparison with the open-pollinated morphotype. Conclusion. Biostimulator Asahi SL had the greatest effect on plant density, plant height, stem thickness at the base, and first productive branch placement, whilst biostimulator Tytanit had the lowest effect. Applied bioregulator types did not affect canopy lodging. Sowing method significantly affected stem thickness at the base, although it did not significantly affect canopy lodging. Genetic factor did not determine plant number established before harvest or changes in canopy lodging. Diversified weather conditions in the study years affected the studied elements of field architecture.
    Celem przeprowadzonych badań było określenie wpływu rodzajów stosowanych biostymulatorów oraz sposobów siewu na elementy architektury łanu trzech odmian rzepaku ozimego. Doświadczenie polowe przeprowadzono w latach 2013–2016 w Rolniczej Stacji Doświadczalnej Zawady (52 o 03' N; 22 o 33' E), należącej do Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach. Eksperyment przeprowadzono w układzie split-split-plot w trzech powtórzeniach. Badanymi czynnikami były: I – odmiana uprawna rzepaku ozimego: Monolit (populacyjna), PR44D06 (mieszańcowa zrestorowana o półkarłowym typie wzrostu), PT205 (mieszańcowa zrestorowana o tradycyjnym typie wzrostu); II – sposób siewu: siew rzędowy (rozstawa rzędów 22,5 cm, gęstość siewu 60 nasion na $1 m^2$), siew punktowy (rozstawa 45,0 cm, gęstość siewu 40 nasion na $1 m^2$); III – rodzaje stosowanych biostymulatorów: wariant kontrolny (bez stosowania biostymulatorów), biostymulator Tytanit®, biostymulator Asahi®SL, biostymulator Silvit®. Badania wykazały istotny wpływ rodzajów stosowanych biostymulatorów oraz sposobów siewu na cechy biometryczne roślin oznaczone przed zbiorem takie jak: obsada, wysokość roślin, grubość łodygi u nasady, wysokość osadzenia pierwszego rozgałęzienia produktywnego. Największą wysokość roślin stwierdzono w morfotypie zrestorowanym o tradycyjnym typie wzrostu i odmianie populacyjnej, zaś wysokość do pierwszego rozgałęzienia produktywnego u PT205. Mieszańce zrestorowane PT205 i PR44D06 cechowała większa grubość łodygi u nasady w porównaniu z morfotypem populacyjnym. Biostymulator Asahi SL wywierał największy wpływ na obsadę roślin, wysokość roślin, grubość łodygi u nasady, wysokość osadzenia do pierwszego rozgałęzienia produktywnego, zaś najmniejszy – Tytanit. Rodzaje stosowanych bioregulatorów nie determinowały ugięcia łanu. Sposób siewu istotnie kształtował grubość łodygi u nasady, jednak nie oddziaływał istotnie na ugięcie łanu. Czynnik genetyczny nie determinował liczby roślin oznaczonej przed zbiorem oraz zmian w ugięciu łanu. Wartości badanych elementów architektury łanu zależały istotnie od warunków klimatycznych panujących w latach prowadzenia doświadczenia.
    Źródło:
    Acta Scientiarum Polonorum. Agricultura; 2018, 17, 4; 205-214
    1644-0625
    Pojawia się w:
    Acta Scientiarum Polonorum. Agricultura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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