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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Reaction of two maize cultivars expressed by dry matter yields depending on nitrogen fertilization level and on magnesium application method

100%
Szulc P., Waligora H., Skrzypczak W.
Acta Agrophysica
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2008
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tom 12
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nr 1[161]
2

Effects of differentiated levels of nitrogen fertilization and the method of magnesium application on the utilization of nitrogen by two different maize cultivars for grain

100%
Szulc P.
Polish Journal of Environmental Studies
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2010
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tom 19
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nr 2
407-412
A field experiment was carried out at the Didactic and Experimental Farm in Swadzim near Poznań in 2004-07. Two maize cultivars were studied, six nitrogen doses and magnesium doses. The effects of the mentioned factors exerted on the utilization of nitrogen from the applied mineral fertilizer and on the nitrogen harvest index were studied. The impact of nitrogen fertilization on the mineral intake of traditional maize cultivars has been widely presented in national and foreign literature. However, there are a limited number of papers comparing the volume of mineral intake and use between the traditional and the “stay-green”-types of cultivars. Moreover, according to the “minimum” principle, the component most deficient in the soil determines harvest volume. Magnesium is obviously one of the ingredients whose deficiency has been found in most of the soils in Poland, and this justifies research focusing on improving the precision of the technology concerning “stay-green”-type maize cultivar fertilization with nitrogen and magnesium, including the environmental aspects. The hybrid LG 2244 “stay-green”-type utilized to a higher degree nitrogen from the applied mineral fertilizer and showed a higher nitrogen harvest index, as compared with a traditional hybrid cultivar: Anjou 258. Increasing levels of nitrogen fertilization decreased N utilization by the plants and the nitrogen harvest index. The application of 15 kg Mg・ha⁻¹ both broadcast and in rows caused increased nitrogen utilization from the mineral fertilizer, which was distinctly shown by the smaller amount of Nmin in the soil after the maize harvest.
3

Susceptibility of two maize cultivars to diseases and pests depending on nitrogen fertilization and on the method of magnesium application

100%
Szulc P., Waligora H., Skrzypczak W.
Nauka Przyroda Technologie. Uniwersytet Przyrodniczy w Poznaniu
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2008
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tom 02
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nr 2
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Improvement of the effectiveness of maize (Zea mays L.) fertilization with nitrogen by the application of magnesium. Part II. Content of nutrients in grain and its energetic value

80%
Szulc P., Waligora H., Skrzypczak W.
Acta Scientiarum Polonorum. Agricultura
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2008
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tom 07
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nr 4
Field experiments were carried out at the Didactic and Experimental Farm in Swadzim (52°26’ N; 16°45’ E) near Poznań in the years 2004-2007. The experiment was carried out in a „split-plot” design with 3 experimental factors and 4 field replications. Two cultivars were studied, 6 doses of nitrogen, one dose of magnesium and the method of fertilizer application were investigated. The content of total protein and N-free extract in the dry matter of grain depends exclusively on the level of nitrogen fertilization. As far as ash content is concerned, it was found that the value of this feature depends only on the cultivar factor. The contents of raw fibre and raw fat were not determined by any of the experimental factors. A higher yield of total protein was obtained from the hybrid LG 2244 in comparison with Anjou 258. Analysis of the amount of nitrogen fertilization has shown that the significantly highest yield of protein was obtained for a dose of 90 kg N.ha⁻¹. On the other hand, a further increase in nitrogen dose caused a significant breakdown of this feature value. Magnesium fertilization amount and the method of its application did not exert any effect on the yield of total protein. The concentration of net energy was not affected by any experimental factors, while the yield of grain net energy was determined by the amount of nitrogen fertilization. The yield of digestible protein depended in a significant way on the cultivar factor and on nitrogen fertilization.
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Improvement of the effectiveness of maize (Zea mays L.) fertilization with nitrogen by the application of magnesium. Part III. Quality of ears designed for silage CCM

80%
Szulc P.
Acta Scientiarum Polonorum. Agricultura
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2009
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tom 08
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nr 3
A field experiment was established at the Experimental and Didactic Station in Swadzim near Poznań over 2004-2007 (52°26’ N; 16°45’ E). The experiment was carried out in a ‘split-plot’ design with 3 research factors in 4 field replications. 2 types of maize hybrids, 6 doses of nitrogen and magnesium doses (including methods of their applications) were examined. The effect of these research factors on the proportion of nutrients and raw material energy value of two types of maize hybrids grown for ear silage were assessed. The hybrid of stay-green type contained less crude fibre but more crude fat in dry matter of ears as compared with the traditional hybrid. The largest amounts of net energy concentration, net energy yield, digestible protein yield and total protein yield were obtained by applying a nitrogen dose of 120 kg N·ha⁻¹. Fertilizing maize with N + Mg (in rows and by broadcasting), an increase in total protein yield was obtained in relation to the treatments with N fertilization only.
6
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Content available

Improvement of the effectiveness of maize (Zea mays L.) fertilization with nitrogen by the application of magnesium. Part I. Grain yield and its structure

80%
Szulc P., Skrzypczak W., Waligora H.
Acta Scientiarum Polonorum. Agricultura
|
2008
|
tom 07
|
nr 4
Field studies were carried out at the Didactic and Experimental Farm in Swadzim near Poznań in the years 2004-2007 (52°26’ N; 16°45’ E). The experiment was carried out in a „split-plot” design with 3 factors in 4 field replications. Two cultivars were studied: Anjou 258 and LG 2244 (stay-green type), six nitrogen doses were used: 0, 30, 60, 90, 120, 150 kg N·ha⁻¹ and doses of magnesium: 0 kg Mg·ha⁻¹, 15 kg Mg·ha⁻¹ (in rows) and 15 kg Mg·ha⁻¹ (broadcasting), in the form of kieserite. Effects of these factors on the yield of maize grown for grain were estimated. A better hybrid in growing maize for grain has shown to be the cultivar of stay-green type. The dose of nitrogen modified grain yield, harvest index and the yield elements of maize. The applied fertilization with magnesium caused grain yield increase, decreasing at the same time the level of fertilization with nitrogen. Magnesium application by broadcasting was a more effective method.
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