Folia Horticulturae

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The effect of the size of planted clusters of bulbils on the quantity and quality of yield of biennial top onion

Marian Orłowski, Dorota Jadczak

Department of Vegetable Growing
Agricultural University of Szczecin
Janosika 8, 71-424 Szczecin, Poland
e-mail: warzywa@ns.rektor.ar.szczecin.pl

The aim of the experiment was to assess the effect of the size of clusters of bulbils used for planting on the quantity and quality of yield of biennial top onion bulbils. The planting material were two-bulbil clusters, three-bulbil clusters, four-bulbil clusters, five-bulbil clusters, and clusters composed of more than five bulbils. Apart from assessment of the quantity of yield, an analysis was made of dry matter content, vitamin C content, and the content of total sugars, the content of reducing sugars and saccharose of the edible parts of top onion (leaves, leaved bulbils, bulbils after the leaves have dried, and underground bulbs). Statistical analysis of the results of the experiment revealed that there was no significant difference in the quantity of the yield in question.

The most dry matter content was found in the bulbils with dried leaves. The most vitamin C (64.8 mg in 100 g of fresh matter) was contained in the leaves of top onion and the least in the bulbils with dried leaves (10.54 mg in 100 g f.m.). These bulbils, contained in turn the most total sugars (20.75 g in 100 g f.m.), and at the same time the fewest reducing sugars (0.52 g in 100 g f.m.) and the most saccharose (19.21 g in 100 g f.m.). The top onion leaves contained the most saccharose and sugars overall.

Orłowski M., Jadczak D., 2002. The effect of the size of planted clusters of bulbils on the quantity and quality of yield of biennial top onion. Folia Horticulturae 14/1: 31-36.