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    Wyświetlanie 1-4 z 4
    Tytuł:
    Effect of companion crops and crop rotation systems on some chemical properties of soil
    Autorzy:
    Orzech, K.
    Zaluski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192074.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    quality of soil
    spring spring barley
    crop rotation
    preceding crop
    companion crops
    Opis:
    The aim of the experiment, conducted in 2005-2011, was to make an assessment of the influence of spring spring barley sowing technology (pure and with companion crops) in crop rotation sequences with 25, 50 and 75% shares of spring spring barley on chemical changes in the 0-20 cm soil horizon. In 2011, spring spring barley (pure sowing) on a stand where spring barley preceded spring barley in a crop rotation system with a 50% spring barley share was found to cause a decline in soil pH and a rise in the soil content of organic carbon (C org.) in comparison with the treatments where companion crops were undersown. Spring barley with the companion crop of Italian ryegrass on a spring barley after spring barley stand raised the pool of C org. in soil relative to the period before the experiment, but the opposite effect was observed when spring barley was undersown with red clover on a stand after potato. In the pure stand, after seven years of the experiment, the highest increase in the soil phosphorus (P) content was noted under the spring barley field following spring wheat, whereas on the plots with the Italian ryegrass companion crop in a sequence of spring barley after spring barley repeated twice the soil was richer in P than prior to the experiment. Once the experiment was terminated in 2011, more potassium (K) was determined in soil under pure spring barley than under spring barley with companion crops. Spring barley with Italian ryegress as a companion crop raised the content of K in soil, but a reverse situation was observed on plots with red clover undersown on a stand of spring barley after potato in comparison with the crop rotation sequences of spring barley after spring wheat and after spring barley. In the case of the soli pH and phosphorus, a positive correlation was noted in the sequence of spring barley undersown with red clover on a stand after spring barley in the crop rotation system with a 75% of spring barley.
    Źródło:
    Journal of Elementology; 2020, 25, 3; 931-949
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nitrogen content and uptake by spring wheat and undersown Persian clover depending on plant density
    Autorzy:
    Wanic, M.
    Mysliwiec, M.
    Orzech, K.
    Michalska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1189783.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    nitrogen content
    nitrogen uptake
    wheat
    spring wheat
    undersowing
    Persian clover
    plant density
    cover crop
    Opis:
    In 2010-2012, a pot experiment was conducted in order to assess the impact of a sowing method and density of spring wheat and Persian clover on their uptake and content of nitrogen in different parts of the plants. The plants were grown in the following variants: a mixture, pure sowing, higher density (recommended in agricultural practice) and density reduced by 20%. Observations were performed in the following wheat development growth stages (BBCH): leaf development (12-14), tillering (21-23), stem elongation (31-32), inflorescence emergence (54-56) and ripening (87-89). The experiment included determinations of dry matter in different parts of plants (aerial organs, roots) and of the nitrogen content in dry matter. Based on the results, the total nitrogen content was determined in both species. The data were also used to calculate nitrogen translocation from the wheat vegetative mass to grain, and to calculate selected competition indicators. It was demonstrated that - regardless of the density of plants - the nitrogen uptake by spring wheat and Persian clover in the mixed sowing was lower than in the pure sowing treatment. Mixed sowing caused a more limited nitrogen uptake by the aerial parts of both species than by their roots. No impact was demonstrated of the plant density on the nitrogen uptake by different parts of spring wheat. Persian clover in pots with the lower sowing density absorbed less nitrogen than in pots with the recommended density. Nitrogen translocation from the vegetative parts to the grain of spring wheat between the inflorescence emergence and ripening stages was more effective in the mixture than in the pure sown plants. In mixed sowing, after nitrogen uptake, wheat proved to be a stronger competitor than Persian clover during the whole plant growing period.
    Źródło:
    Journal of Elementology; 2016, 21, 1; 231-246
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nitrogen content and uptake by spring wheat and undersown Persian clover depending on plant density
    Autorzy:
    Wanic, M.
    Mysliwiec, M.
    Orzech, K.
    Michalska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/14801.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    nitrogen content
    nitrogen uptake
    wheat
    spring wheat
    undersowing
    Persian clover
    plant density
    cover crop
    Opis:
    In 2010-2012, a pot experiment was conducted in order to assess the impact of a sowing method and density of spring wheat and Persian clover on their uptake and content of nitrogen in different parts of the plants. The plants were grown in the following variants: a mixture, pure sowing, higher density (recommended in agricultural practice) and density reduced by 20%. Observations were performed in the following wheat development growth stages (BBCH): leaf development (12-14), tillering (21-23), stem elongation (31-32), inflorescence emergence (54-56) and ripening (87-89). The experiment included determinations of dry matter in different parts of plants (aerial organs, roots) and of the nitrogen content in dry matter. Based on the results, the total nitrogen content was determined in both species. The data were also used to calculate nitrogen translocation from the wheat vegetative mass to grain, and to calculate selected competition indicators. It was demonstrated that - regardless of the density of plants - the nitrogen uptake by spring wheat and Persian clover in the mixed sowing was lower than in the pure sowing treatment. Mixed sowing caused a more limited nitrogen uptake by the aerial parts of both species than by their roots. No impact was demonstrated of the plant density on the nitrogen uptake by different parts of spring wheat. Persian clover in pots with the lower sowing density absorbed less nitrogen than in pots with the recommended density. Nitrogen translocation from the vegetative parts to the grain of spring wheat between the inflorescence emergence and ripening stages was more effective in the mixture than in the pure sown plants. In mixed sowing, after nitrogen uptake, wheat proved to be a stronger competitor than Persian clover during the whole plant growing period.
    Źródło:
    Journal of Elementology; 2016, 21, 1
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of manure, municipal sewage sludge and compost prepared from municipal sewage sludge on crop yield and content of Mn, Zn, Cu, Ni, Pb, Cd in spring rape and spring triticale
    Wplyw obornika, komunalnego osadu sciekowego i kompostu z niego wyprodukowanego na wielkosc plonu i zawartosc mikroskladnikow Mn, Zn, Cu, Ni, oraz Pb i Cd w rzepaku jarym i pszenzycie jarym
    Autorzy:
    Izewska, A
    Powiązania:
    https://bibliotekanauki.pl/articles/13791.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    manure
    municipal sewage sludge
    compost
    crop yield
    manganese content
    zinc content
    copper content
    nickel content
    lead content
    cadmium content
    rape
    spring rape
    triticale
    spring triticale
    bioaccumulation index
    Opis:
    The aim of the research was to estimate the impact of manure, municipal sewage sludge and compost prepared from municipal sewage sludge on crop yield and content of microelements (Mn, Zn, Cu, Ni) as well as Pb, and Cd in spring rape and spring triticale and also to specify the bioaccumulation indexes of microelements in test plants. A pot experiment was set up in the Vegetation Hall of the University of Agriculture in Szczecin 2006. Manure, raw sewage sludge and compost prepared from sewage sludge with the GWDA method were used. The pot experiment was set up with the split plot method in three repetitions. Objects of the first factor were types of fertilizers (manure, municipal sewage sludge and compost prepared from sewage sludge) and objects of the second factor were the doses of individual fertilizers introduced to soil in conversion to the amount of incorporated nitrogen (85 and 170 kg N⋅ha-1 i.e. 0.26 and 0.52 g N per pot). The results indicate that the best yields of spring rape seeds and spring triticale grains were obtained from the object fertilized with a double dose of sewage sludge. Fertilization with manure, sewage sludge and compost prepared from sewage sludge increased the content of microelements as well as Pb and Cd in seeds and grains of the test plants. These contents did not exceed permissible values for industrial plants. The calculated bioaccumulation indexes of microelements indicate that spring rape and spring triticale were accumulating moderate amounts of manganese and zinc.
    Celem badań było określenie wpływu nawożenia gleb obornikiem, komunalnym osadem ściekowym i kompostem z niego wyprodukowanym na wielkość plonu i zawartość mikroskładników (Mn, Zn, Cu, Ni) oraz Pb i Cd. w rzepaku jarym i pszenżycie jarym oraz określenie wskaźników bioakumulacji tych pierwiastków w roślinach uprawianych. W 2006 r. założono doświadczenie wazonowe na terenie hali wegetacyjnej AR w Szczecinie. Do badań użyto obornik, surowy osad ściekowy i wyprodukowany metodą GWDA kompost z osadów ściekowych. Doświadczenie wazonowe założono metodą split plot w trzech powtórzeniach. Obiektami pierwszego czynnika były rodzaje nawozów (obornik, komunalny osad ściekowy, kompost z osadu ściekowego), a obiektami II czynnika – dawka poszczególnych nawozów wprowadzana do gleby w przeliczeniu na ilość wniesionego azotu (85 i 170 kg N⋅ha-1, tj. 0,26 i 0,52 g N na wazon). Uzyskane wyniki badań wskazują, że największy plon nasion rzepaku jarego i ziarna pszenżyta jarego zebrano z obiektów nawożonych podwojoną dawką osadu ściekowego. Nawożenie osadem ściekowym oraz kompostem spowodowało zwiększenie zawartości mikroskładników oraz Pb i Cd w nasionach oraz ziarnie roślin testowych. Zawartości te jednak nie przekroczyły dopuszczalnych wartości dla roślin przemysłowych. Obliczone wskaźniki bioakumulacji wskazują, że rzepak jary i pszenżyto jare w stopniu średnim akumulowały mangan i cynk.
    Źródło:
    Journal of Elementology; 2009, 14, 3; 449-456
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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