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The effect of nitrogen fertilization on content of microelements in selected onions

100%

Jurgiel-Malecka G., Suchorska-Orlowska J.

Journal of Elementology

2008

tom 13

nr 2

The effect of nitrogen fertilization on microelements (iron, manganese, copper and zinc) content in the yield of onion (Allium cepa L. var. cepa Helm.), top onion (Allium cepa var. proliferum Targioni-Tozzetti) and shallot onion (Allium cepa L. var. ascalonicum) was examined in a three-year field experiment conducted at the Vegetable Experimental Station in Dołuje. Urea, ammonium nitrate and calcium nitrate were applied in two different nitrogen doses: 100 kg N⋅ha-1 and 200 kg N⋅ha-1. The bulbs were planted in field at the beginning of April. The planting density was 30 x 5 cm (onion) and 30 x 10 cm (top onion and shallot onion). During the growing season, the soil tillage and plant cultivation treatments were conducted according to standard methods. Onion and shallot onion were harvested during the last days of July or the first days of August, after 75% of the plants had bent leaves. Top onion was harvested at the end of September. The content of microelements in dry matter of the analyzed plants was determined by atomic absorption spectrometry, after wet mineralization of the samples in a mixture of concentrated nitric and perchloric acids mixed in a 3:1 ratio. The applied nitrogen fertilization significantly affected microelements in all the tested onions. The content of iron and manganese in onion bulbs increased with the increasing nitrogen doses, while that of copper and zinc decreased. The analysis of the results led to a conclusion that a significant effect on the chemical composition of yield produced by onion, top onion and shallot onion was produced by the applied nitrogen dose but not its form. The content of microelements and extent of the changes caused by the nitrogen fertilization depended on the tested type of onion.

Ograniczanie wyników

1 Journal of Elementology

1 Jurgiel-Malecka G.

1 Suchorska-Orlowska J.

1 2008

Wyniki wyszukiwania

The effect of nitrogen fertilization on content of microelements in selected onions