Abstract
In the present study, three climbing edible roses (‘Crown Princess Margareta’, ‘Falstaff’ and ‘Brother Cadfael’) were evaluated for total vegetative growth and flowers production, besides correlations with soil microbiological and agrochemical parameters. The applied organic technology included a soil preparatory stage with three ameliorative plants (Sinapis alba L., Phacelia tanacetifolia L. and Tagetes patula L.) and two organic mulch variants (wood chips and wool) after plantation. In variant Sinapis and Tagetes, all three varieties of roses showed the highest values for parameters: total vegetative growth, number of shoots, average shoots length and flowers number. Significant positive correlations between biometric parameters and soil bacteria, phosphorus, mineral nitrogen, potassium (0-20 cm horizon) and humus (20-40 cm horizon) content were observed. Significant positive correlations between the number of flowers and the soil respiration coefficient, soil content in phosphorus, potassium, humus, total soluble salts and mineral nitrogen were noticed. Negative correlations with soil pH have been observed. Taking into account the data obtained in the two flowering stages in 2017, the average yield per hectare cultivated with ‘Crown Princess Margareta’ was 9.44 t petals/ha. For the ‘Falstaff’ and ‘Brother Cadafael’ cultivars, the yields were 7.54 and 5.62 t petals per hectare respectively.
Highlights
Edible roses have been classified by many authors (Bojor and Răducanu, 2007; Milică et al, 2010; Stănică and Braniște, 2011; Sumedrea et al, 2014) within species of the genus Rosa such as Rosa rugosa Thunb., Rosa centifolia L., Rosa damascena Mill., of whose petals can be used for the jam production
The highest total vegetative growth was registered in V4 (Sinapis + Tagetes) and V6 (Tagetes + Phacelia) for all three cultivars while V3 (Phacelia) and V7 (Tagetes) for the lowest values
At the wood chips mulched and at the un-mulched rows there were no significant differences between ameliorative plants variants
Summary
Edible roses have been classified by many authors (Bojor and Răducanu, 2007; Milică et al, 2010; Stănică and Braniște, 2011; Sumedrea et al, 2014) within species of the genus Rosa such as Rosa rugosa Thunb., Rosa centifolia L., Rosa damascena Mill., of whose petals can be used for the jam production. Many breeders (David Austin in the United Kingdom, Rosen Tantau and Kordes in Germany, Meilland in France, etc.) offer a large series of rose cultivars that are not of the above species and have the word ‘edible’ (which can be used in food industry for jam, sweetness, syrup, etc.). The rose has been used since ancient times as a medicinal plant
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