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Response of maize hybrid (Zea mays L.), stay-green type to fertilization with nitrogen, sulphur, and magnesium. Part II. Plant development and the uptake of mineral components

100%

Szulc P., Waligora H.

Acta Scientiarum Polonorum. Agricultura

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2010

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tom 09

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nr 1

Field experiment was carried out in the Didactic and Experimental Department in Swadzim near Poznań, in years 2004-2005 (52°26’ N; 16°45’ E). The experiment was established in a „split-plot” design with two factors and four field replications. The primary factor consisted in three nitrogen doses: 0, 60, and 120 kg N·ha⁻¹, while the secondary factor included four doses of kieserite (magnesium sulphate): 0 kg fertilizer·ha⁻¹, 100 kg fertilizer·ha⁻¹ (25 kg MgO·ha⁻¹ + 20 kg S·ha⁻¹), 200 kg fertilizer·ha⁻¹ (50 kg MgO·ha⁻¹ + 40 kg S·ha⁻¹), and 300 kg fertilizer·ha⁻¹ (75 kg MgO·ha⁻¹ + 60 kg S·ha⁻¹). It was found that the fertilization of maize with kieserite in the dose of 300 kg of fertilizer per ha does not generate any disturbances in the correct germination of maize seeds and that such a dose level is not toxic to maize plants. The level of nitrogen fertilization differentiated the dry matter of a single plant and the dry matter yield of plants in the phase of 5-6 leaves (BBCH 15-16), as well as the yield of the dry matter of ears and of the whole plants. The size of kieserite dose differentiated the dry matter yield of stover, ears, and whole plants. Uptake of nitrogen, potassium, and calcium in the phase of 5-6 leaves (BBCH 15-16) increased with the increasing doses of nitrogen. Fertilization of maize with nitrogen in the dose of 120 kg N·ha⁻¹ with kieserite increased the yield of plant dry matter and nitrogen uptake in the above mentioned yield of plants in the phase of 5-6 leaves (BBCH 15-16). The level of nitrogen fertilization differentiated the chlorophyll content expressed in SPAD units in the phase of 5-6 leaves (BBCH 15-16); however, in the ear blooming phase (BBCH 67), the value of this feature was modified by the level of the doses of nitrogen and kieserite.

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Response of maize hybrid (Zea mays L.), stay-green type to fertilization with nitrogen, sulphur, and magnesium. Part I. Yields and chemical composition

100%

Szulc P., Waligora H.

Acta Scientiarum Polonorum. Agricultura

|

2010

|

tom 09

|

nr 1

Field experiment was carried out in the Didactic and Experimental Department in Swadzim near Poznań, in years 2004-2005 (52°26’ N; 16°45’ E). The experiment was established in a „split-plot” design with two factors and four field replications. The primary factor consisted in three nitrogen doses: 0, 60, and 120 kg N·ha⁻¹, while the secondary factor included four doses of kieserite (magnesium sulphate): 0 kg fertilizer·ha⁻¹, 100 kg fertilizer·ha⁻¹ (25 kg MgO·ha⁻¹ + 20 kg S·ha⁻¹), 200 kg fertilizer·ha⁻¹ (50 kg MgO·ha⁻¹ + 40 kg S·ha⁻¹), and 300 kg fertilizer·ha⁻¹ (75 kg MgO·ha⁻¹ + 60 kg S·ha⁻¹). An increase in the nitrogen dose increased grain yield, its moisture, and weight of 1000 grains but it decreased the yield index and the number of production ears. Under the influence of the magnesium sulphate fertilizer (kieserite), maize produced a higher yield of grains while limiting the vegetative biomass. The level of fertilization with nitrogen and kieserite differentiated the nitrogen content in the dry matter of grain and the magnesium content in the dry matter of ears. With an increased nitrogen fertilization, the content of crude fibre in the dry matter of grain increased, while the number of extraction compounds decreased. An increased dose of kieserite decreased the quantity of crude fibre in the dry matter of grain but, at the same time, it increased the amount of N-free extract. The highest yield of net energy, yield of digestible protein, and total protein were obtained for the dose of 120 kg N·ha⁻¹.

3

Assessment of susceptibility of „stay-green” type maize cultivars (Zea mays L.) to maize smut [Ustilago maydis (DC.) Corda] and European corn borer (Ostrinia nubilalis Hbn.)

75%

Szulc P., Idziak R., Woznica Z., Sobiech L.

Progress in Plant Protection

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2014

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tom 54

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nr 3

The aim of the study was monitoring prevalence of corn smut and European corn borer on maize plants with „stay-green” genotype. Four cultivars bred by Syngenta Seeds were analyzed: NK Cooler, Delitop, NK Gazelle and NK Ravello. A significant influence of thermal and humidity conditions during maize vegetation seasons on infestation of the examined agrophages was demonstrated. However, no significant differences were noted in susceptibility of the examined hybrids to infestation rate with Ustilago maydis and prevalence of Ostrinia nubilalis. A tendency was observed towards higher occurrence of European corn borer on cultivar NK Gazelle, and higher frequency of plants infested with U. maydis on cultivar NK Ravello, when compared to the mean value of the years.

Ograniczanie wyników

2 Acta Scientiarum Polonorum. Agricultura

1 Progress in Plant Protection

3 Szulc P.

2 Waligora H.

1 Idziak R.

1 Sobiech L.

1 Woznica Z.

1 2014

2 2010

Response of maize hybrid (Zea mays L.), stay-green type to fertilization with nitrogen, sulphur, and magnesium. Part II. Plant development and the uptake of mineral components

Response of maize hybrid (Zea mays L.), stay-green type to fertilization with nitrogen, sulphur, and magnesium. Part I. Yields and chemical composition

Assessment of susceptibility of „stay-green” type maize cultivars (Zea mays L.) to maize smut [Ustilago maydis (DC.) Corda] and European corn borer (Ostrinia nubilalis Hbn.)