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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Evaluation of regional variability and spatial correlations of yields for main crops and rates of fertilization

100%
Laudanski Z., Flaszka M., Gozdowski D.
Colloquium Biometricum
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2009
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tom 39
2

Morphological traits in maize cultivars at varied N and Mg fertilization rates

72%
Szulc P., Nowosad K., Bocianowski J.
Polish Journal of Agronomy
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2016
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nr 25
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 of maize cultivars differing in their genetic profiles. The aim of the conducted field tests was the evaluation of the effect of application of magnesium in maize cultivation, which would increase effectiveness of nitrogen fertilization. A visible symptom of that may be a modification of morphological features of the plant. The properties analyzed in this paper (plant height) can have significant effect on shaping plant photosynthetic surface area that determines productivity thereof. It was shown that the number of plants was inversely proportional to the applied nitrogen rate. The stay-green hybrid was characterised by a greater number of plants both after emergence and during harvest. The significantly shortest plants were found for the dose of 0 kg N ha-1 in comparison to three other levels of application of this ingredient, for which the value of this property was significantly at the same level. Regardless of the nitrogen and magnesium dose, the „stay-green” ES Paroli variety was characterized by lower plants, a lower height of ear setting, a shorter length and diameter of the ears and the smaller volume of a ears compared with the ES Palazzo hybrid. Under conditions of this study it was ineffective to apply magnesium, as evidenced by the lack of effect of this macroelement on the analysed traits.
3

Ionic balance in some phases of winter barley seed growth under different fertilization rates

72%
Barczak B., Nowak K., Kozera W., Majcherczak E.
Journal of Elementology
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2005
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tom 10
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nr 4 Suppl.1
15
4

Service cock only indirectly affects hatchability in laying hens

72%
Rozempolska-Rucinska I., Zieba G., Lukaszewicz M.
Animal Science Papers and Reports
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2010
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tom 28
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nr 2
The purpose of the study was to investigate the effect of service sire on fertilization rate and loses during hatching as a way of increasing the accuracy of breeding value estimation of layers for hatchability. Layers from five generations of two breeds – Rhode Island White and Rhode Island Red – were individually recorded for fertilization rate, percentage of chicks hatched from eggs laid,set, and fertilized. Two statistical models, both fitting random animal additive genetic and permanent environment effects along with fixed joint effect of hatch-year × hatch-number, differed with regard to presence or absence of random effect of service sire. Of the traits studied fertilization rate is least influenced by service sire which can be neglected when evaluating fertilization. Although sernice sire effect is small, both absolutely and relatively, failing to account for it in a model evaluating number of chicks hatched may result in substantial overestimation of heritability. Service sire effect accounted for in the model can also add to the accuracy of the hens’ proofs for hatchability.Correlation between direct additive and service sire effects may be dependent on the population it is estimated in.
5
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Growing the endangered species Astragalus nitidiflorus in the nursery: fertilization rate affects growth, and leaf nutrient and chlorophyll contents

72%
Vicente M. J., Martinez-Sanchez J. J., Franco J. A., Banon S.
Acta Scientiarum Polonorum. Hortorum Cultus
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2018
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tom 17
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nr 4
Astragalus nitidiflorus is an endangered legume endemic to the southeast of the Iberian Peninsula. This species develops symbiotic relationships with N-fixing bacteria. However, the problem of isolating its rhizobia has not been solved. Because poor N fixation in plants can be corrected by fertilization, the effect of N-P-K fertilizers on growth, leaf chlorophyll and mineral ions was studied. Plants of A. nitidiflorus were grown in 100%-substrate with different N-P-K fertilizer rates (mg l–1): 1-1-8 (S0), 69-29-35 (SL), 144-43-131 (SM) and 245-58-235 (SH). A treatment with substrate plus soil from the natural habitat and no fertilizers (T0) was included. The reference foliar contents of N, P and K were 42.5, 3.5 and 36.5 mg g–1, respectively. Although the species did not form root nodules when grown in substrate, T0 plants produced active nodules that allowed the plants to grow properly without fertilization. In the absence of nodules, both N fertilization (~144 mg l–1) and Fe fertilization (>12 mg l–1) are vital, as is, to a lesser extent, K fertilization (~75 mg l–1 K2O). The S0 and SL reduced leaf chlorophyll, while SM prevented its degradation.
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