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Phosphorus (P) in most regions worldwide is the most important nutrient, second only to nitrogen (N), with the potential to limit agricultural production. It is an essential nutrient for plant growth and development, while the cycle of this nutrient in nature is also essential for humans and animals. In plants it is a component of organic compounds, which accumulate large amounts of energy used in...
In the present work the impact of the 3-pyridyl ketoxime and its quaternary pyridinium bromides with various alkyl chain lengths on the monocot plant – maize (Zea mays L.) was tested. The study was carried out on two systems – hydroponic and soil. After a seven-day period of these experiments, the number of germinated seeds was counted and the length of maize radicle and shoot was also measured. 3-pyridyl...
Analysis of relationships between traits is an important stage in research. These results determine the decisions taken at further stages of research as well as those made when realising successive experiments. The paper presents results of an analysis of relationships between twelve traits of two types of maize (Zea mays L.) cultivars differing in leaf blade senescence rates: ES Palazzo and ES Paroli...
Field experiments were conducted at the Teaching and Experimental Station in Swadzim near Poznań in the years 2009-2011. They were carried out in the split-split-plot design with three experimental factors in four field replications. Analyses were conducted to investigate four nitrogen fertilization rates and two magnesium fertilization rates on morphological traits of plants and ears in two types...
The paper presents results of multivariate analyses assessing variation in quantitative traits after the application of nitrogen and magnesium rates in cultivation of two types of maize (Zea mays L.) cultivars, i.e. ES Palazzo and the stay-green ES Paroli. The purpose of this study was to assess the multivariate phenotypic variation of 16 objects which are a combination of four nitrogen doses, two...
This paper presents the effects of soil supplementation with different forms of nitrogen fertilizers on select fertilization efficiency indices in two types of maize hybrids and on changes in contents of mineral nitrogen in soil after maize harvest. Nitrogen content in grain of maize and its uptake with grain yield and utilization were significantly higher for slow-release fertilizers in comparison...
A field experiment was carried out in the Department of Agronomy of Poznań University of Life Sciences on the fields of the Research and Education Unit in Swadzim in 2009-10. Two different genotypes of maize cultivated for grain that exhibited different aging rates were compared: ES Palazzo and ES Paroli "stay-green"-type cultivar. The dynamics of dry matter accumulation were assessed 10...
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):...
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):...
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...
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...
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,...
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