The effect of soil supplementation with different forms of nitrogen fertilizer on modification of generative yield in two different types of maize (Zea mays L.) hybrids
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Date
2012
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Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy w Puławach
Abstract
Description
The paper presents results of field trials, the aim of
which was to evaluate the effect of soil supplementation with different
forms of nitrogen fertilizers and with magnesium in the
modification of generative yield in two different types of maize
cultivars. The study determined grain yield at a 15% moisture
content, grain moisture content, grain yield components, i.e. the
number of productive ears per unit area, thousand kernel weight,
number of kernels per ear and the number of kernel rows per ear
as well as the number of kernels per row. Moreover, correlation
coefficients were calculated for correlations between analysed
traits. It was shown that the type of nitrogen fertilizer and the
dose of magnesium did not differentiate significantly grain water
content during maize harvest and grain yield volume. Among
analysed nitrogen fertilizers, slow-release fertilizers such as ammonium
sulfate, urea and an ammonium nitrate and urea mixture
with a 50% proportion of each fertilizer in the component
dose proved to be the most advantageous variants in terms of
grain yield for the stay-green cultivar. For each of the tested nitrogen
fertilizers except for ammonium sulfate the application of
25 kg MgO ha-1 resulted in an increase of grain yield in relation to
the treatment where this nutrient was not used. A combined ammonium
sulfate fertilization with 25 kg MgO ha-1 reduced grain
yield. For both maize cultivars tested in the experiment at each
form of nitrogen fertilization and at the absence of fertilization statistically
significant positive correlations were found between the
number of kernels in the ear and the number of kernels in the row.
Keywords
maize, stay-green, nitrogen fertilizer, grain yield, grain yield structure
Citation
Polish Journal of Agronomy
2012, 11, 52–64