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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effect of planting date and method on the chemical composition of radicchio heads

100%
Francke A., Majkowska-Gadomska J.
Journal of Elementology
|
2008
|
tom 13
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nr 2
The aim of the experiment, conducted from 2005 to 2006, was to determine the effect of planting date (spring, summer/fall) and method (seedlings, direct sowing) on the content of dry matter, selected organic components and nitrates in the heads of Italian chicory radicchio, cv. Palla Rossa 3. Statistical analysis revealed that both experimental factors had a significant effect on the content of dry matter and simple sugars in the edible parts of radicchio. Dry matter content was significantly affected by planting method, while the concentration of total sugars – by planting date. Chemical analysis of the harvested plant material indicated that radicchio grown in the spring contained more dry matter, L-ascorbic acid, simple sugars and total sugars. Plants obtained from seedlings accumulated more L-ascorbic acid and simple sugars, whereas those grown from directly sown seeds contained more dry matter and total sugars. The nitrate content of radicchio heads was found to be significantly dependent on both experimental factors. A significantly higher (by over 33%) concentration of nitrates was recorded in the edible parts of radicchio grown in the summer/fall. The impact of planting method on nitrate content was less noticeable, but radicchio plants grown from directly sown seeds accumulated more nitrates (by almost 11% on average) than those obtained from seedlings. The interaction between the analyzed factors had a significant effect on the bioaccumulation of dry matter, L-ascorbic acid, simple sugars, total sugars and nitrates.
2

The effect of the date and depth of corm planting on the quality traits of Sparaxis tricolor Ker.-Gawl. flowers grown in the conditions of the Lublin District

84%
Marcinek B., Hetman J.
Electronic Journal of Polish Agricultural Universities. Series: Horticulture
|
2006
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tom 09
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nr 2
A field experiment was conducted in the years 2000-2003. The corms of Sparaxis tricolor were planted in spring at the following dates: 20.04, 29.04, 10.05 and 20.05 at 3 depths of planting: 4, 6 and 8 cm. The greatest number of inflorescence stalks growing from 1 corm was obtained planting Sparaxis at the earliest of the studied dates. The length of the main shoot, the length of the spike, the number of inflorescences in a spike as well as the diameter of the first flower were also the biggest when the corms were planted at the turn of the second and third 10-days’ period of April. More inflorescence stalks were obtained planting the corms at the depth of 4 cm. Deeper corm planting at the depth of 6-8 cm had a positive effect on the diameter of the first flower in the inflorescence and the length of the leaves. The studies observed a positive effect of earlier planting on the formation of inflorescence stalks containing at least 5 flowers in a spike. Their proportion range in particular years was from 15 to 40% for Sparaxis planted on 20 April and it decreased to 6-17% when the corms were planted on 20 May.
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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The effect of summer seedling planting dates on the development of seed stalks in shallot (Allium cepa L. var. ascalonicum Backer)

84%
Tendaj M., Mysiak B.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2013
|
tom 12
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nr 6
Up-to-date production of shallots for commercial purposes was limited due to low supply of the seeding material as well as no breeding cultivars that would produce seeds. Local populations commonly grown in various countries are reproduced mainly in vegetative way, because they usually do not produce generative shoots nor seeds, or they are formed, but in a very reduced number. The aim of this study, conducted in the period 2009–2012, was to evaluate generative growth and seed production in shallot grown from seedlings planted in summer at different dates, without producing mother bulbs. The study included 4 shallot cultivars – ‘Toto’, ‘Ambition F1’, ‘Bonilla F1’, and ‘Matador F`1’. Seedlings (4 weeks old) were planted in the field on three dates – 3rd decade of July, 1st decade of August, and 3rd decade of August. In the second year of cultivation, after the plants had overwintered in the ground, losses in plants, the percentage of plants producing seed stalks and some traits of these stalks as well as seed yield in the true breeding cultivar ‘Toto’ were determined. Plants of the other cultivars were not allowed to produce seeds (inflorescence umbels were topped before flower opening), since these were hybrids and undesired cross-breeding could occur. The study showed that overwintering losses in plants were on average 26.3%, but they were the lowest in cv. ‘Toto’, in particular among plants obtained from the first date of planting seedlings. Irrespective of the cultivar, the largest amount of plants with developed seed stalks and with their highest number per plant were recorded in the treatments where the first planting date was used. A delay in planting seedlings in the first year of cultivation by 2–4 weeks had a significant effect on reducing the percentage of plants developing seed stalks in the second year, while in cv. ‘Toto” it resulted in a very high decrease in seed yield.
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Yielding of Sparaxis tricolor Ker-Gawl. according to term and depth of planting in Lubelszczyzna region

84%
Marcinek B., Hetman J.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2005
|
tom 04
|
nr 2
Corms of Sparaxis tricolor were planted in the second 10 days period: from 20th April to 20th May, on three depths: 4 cm, 6 cm and 8 cm. The largest number of descendant corms and fresh matter of total and commercial yield was obtained from corms planted in the field on 20th April. Retarding of planting date influenced dispersion of the total yield of offspring corms. The largest number of corms produced in corners of leaves was obtained in the second 10 days’ period of April. Depth of planting did not influence the total yield of corms. Plants from earlier terms produced, more descendant corms at the depth of 4 cm, while these from May dates more descendant corms produced at growing depth 8 cm.
5

Zawartosc azotanow w ziemniaku w zaleznosci od poziomu nawozenia azotem i terminu sadzenia

67%
Prosba-Bialczyk U.
Biuletyn Instytutu Ziemniaka
|
1996
|
nr 46
73-81
6

Wplyw terminu sadzenia i poziomu nawozenia azotem na gromadzenie i strukture plonu ziemniaka

67%
Prosba-Bialczyk U.
Biuletyn Instytutu Ziemniaka
|
1993
|
nr 43
65-73
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