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Ewa Rekowska and Katarzyna Skupień

The Influence of Selected Agronomic Practices on the Yield and Chemical Composition of Winter Garlic

The studies were carried out in 2002-2005 on evaluation of covers application (a perforated film with 100 holes·m-2 and polypropylene non-woven) as well as the influence of different plant density (250, 125, 83 and 63 plants·m-2) on the yield and chemical composition of winter garlic cv. Arkus for bunch-harvest.

Covering the plants with perforated film and polypropylene non-woven increased the marketable yield by 30.7% in comparison to open field cultivation. Moreover, the covers had a favourable effect on the weight and leaf length as well as on plant weight and bulb diameter. The plants grown under covers showed significantly higher dry weight content in bulbs, total sugars in leaves, but simultaneously less amount of L-ascorbic acid. The increase of plant density from 63 to 250 per m2 caused a significant increase of marketable yield. However, the plants grown at the highest density had the lowest weight and their edible parts had the least amount of total sugar and L-ascorbic acid.

Open access

Ewa Rekowska and Katarzyna Skupień

Influence of Flat Covers and Sowing Density on Yield and Chemical Composition of Garlic Cultivated for Bundle-Harvest

In 2003-2005 years the experiment of influence of flat covers usage (non-woven polypropylene and perforated polyethylene film) and clove sowing rate (20x2, 20x4, 20x6, 20x8 cm) on quantity and quality of garlic yield cultivated for bundle-harvest was carried out.

Covering with non-woven polypropylene and perforated film was found to increase the yield of spring garlic cv ‘Jarus’ by 24.5% in comparison to open-field cultivation (control). Nevertheless the film type covered plants were higher, produced more leaves and longer leaves what resulted in higher weight per plant.

On the other hand the leaves of garlic grown in open field contained significantly higher amount of dry matter and vitamin C compared to covered ones.

Marketable yield of garlic was also considerably dependent of clove sowing rate. The highest yield was observed while 20x2 cm density was applied. However, significantly longest leaves and highest weight per plant were obtained at 20x4 cm sowing rate.

Open access

Beata Smolik, Agata Miśkowiec, Ewa Rekowska, Helena Zakrzewska and Martyna Śnioszek

Abstract

The aim of this study was to determine the effect of biostimulators: Kelpak, Asahi SL and Goëmar Goteo on some biochemical parameters-proline and MDA concentration in leaves and florets of Monaco F1cultivars of broccoli grown under field conditions. Biostimulators applied in the experiment caused changes of some biochemical parameters in the plants. Kelpak and Goëmar Goteo significantly increased the oxidative stress parameters like the concentration of proline and malondialdehyde in leaves and florets of broccoli cultivar Monaco F1. Although, Asahi SL affected the content of chosen biochemical parameters although not seriously.