Autor: Potarzycki, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Trends in phosphorus concentrations in potato organs during the growing season
Autorzy:: Potarzycki, J.
Grzebisz, W.
Powiązania:: https://bibliotekanauki.pl/articles/15058.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2019, 24, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The in-season variability in the calcium concentration in potato organs and its relationship with the tuber yield
Autorzy:: Potarzycki, J.
Grzebisz, W.
Powiązania:: https://bibliotekanauki.pl/articles/15553.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2020, 25, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Nitrogen profile of potato during the growing season - the tuber yield prediction
Autorzy:: Grzebisz, W.
Biber, M.
Potarzycki, J.
Powiązania:: https://bibliotekanauki.pl/articles/15238.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2019, 24, 4
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: An assessment of the effect of potassium fertilizing systems on maize nutritional status in critical stages of growth by plant analysis
Ocena wpływu systemu nawożenia potasem na stan odżywienia kukurydzy w krytycznych fazach wzrostu metodą analizy roślinnej
Autorzy:: Szczepaniak, W.
Grzebisz, W.
Potarzycki, J.
Powiązania:: https://bibliotekanauki.pl/articles/15658.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Yield of maize depends on nitrogen supply to the plant at critical stages of the formation of main yield components. In the rain-fed production system, the productivity of applied nitrogen is conditioned by water supply to growing crop. Potassium is considered to be a nutrient significantly affecting water use by crops. Therefore, an in-season nitrogen balance is needed to adjust N levels and predict yields. These assumptions were validated in a long-term static field experiment with four levels of potassium fertilizing. They were differentiated by two soil fertility levels (Medium, High) and applied fertilizer (K-, K+). The nutritional status of maize was evaluated at two stages: 5 th leaf and the beginning of flowering, using three approaches: i) nutrient concentration, ii) nitrogen to other nutrient ratios, iii) DRIS (Diagnosis Recommen - ded Integrated System) method. These studies showed that potassium management was the key contributor to the year-to-year grain yield variability. Thus, grain yield was the basis for verification of the tested indices. At the 5 th leaf stage only phosphorus (concentration and N/P ratio) can be considered as a potential predictor of the final yield of grain. The ear leaf as a vegetative part proved to be useful for evaluation of nutritional indices in maize and for making predictions about yield. The optimal system of potassium management can be defined according to its impact on the N/K, N/Mg and N/Ca ratios and, consequently, on yields of maize. The N/K ratio reached the saturation status, as presented by the quadratic regression model. The other two ratios affected grain yield in accordance to the linear regression model. The applied DRIS procedure corroborated the importance of potassium management as a factor significantly affecting the nutritional balance in maize. This crop has a potential to produce high yield of grain on medium K fertile soil provided potassium fertilizer is supplied whenever needed.
Źródło:: Journal of Elementology; 2014, 19, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The magnesium and calcium mineral status of maize at physiological maturity as a tool for an evaluation of yield forming conditions
Autorzy:: Szczepaniak, W.
Grzebisz, W.
Potarzycki, J.
Lukowiak, R.
Przygocka-Cyna, K.
Powiązania:: https://bibliotekanauki.pl/articles/15844.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Grain yield of maize reflects the extent of nutrient imbalance during the growing period. The key objective of a post-harvest analysis of maize, based on chemical characteristics of each part of plants harvested at physiological maturity, is to determine mineral indices which can serve as indicators of grain yield. This assumption has been validated by a long-term field experiment with four levels of potassium and nitrogen supply (0, 100, 150, and 200 kg N ha-1). The potassium application systems were differentiated by the soil fertility level (Medium, High) and K fertilizer (K-, K+). The grain yield of maize was significantly affected by an interaction of the potassium fertilizing systems and years. The importance of this interaction for yield formation manifested itself most distinctly in 2005, when the weather was favourable for plant growth, and in 2004, a season with temporary drought, but not in 2006, when severe drought occurred during the period termed as the critical window. The study implicitly showed that stem leaves can be used as indicators of the management of magnesium by maize while the grain content of calcium indicates how the plant manages that element. The limited size of maize’s physiological sink, i.e. number of kernels per cob, significantly decreases the flow of magnesium from leaves to kernels. Therefore, an elevated concentration and/or content of magnesium in stem leaves can be considered as an indicator of some disturbance of the yielding performance. The calcium concentration in grain showed the highest year-to-year variability among the maize parts. Any increase of this grain characteristic resulted in a yield decline. The key reason was an imperfect structure of the cob due to the disturbed setting up of kernels.
Źródło:: Journal of Elementology; 2016, 21, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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