Turkish Journal of Field Crops

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THE EFFECTS OF STORAGE TEMPERATURE AND DURATION ON ESSENTIAL OIL CONTENT AND COMPOSITION OIL ROSE (Rosa damascena Mill.)

Soner KAZAZ, Sabri ERBAS, Hasan BAYDAR

Abstract

This study was conducted in order to determine the effect of different storage temperatures (0 oC and 3 oC) and durations (7, 14, 21 and 28 days) on oil yield and essential oil components of oil rose (Rosa damascena Mill.). In this study, the rose oils were obtained by hydro-distillation in Clevenger-type apparatus and the components in the rose oil were analyzed by GC-MS. It was determined that the effect of storage temperatures on oil content wasn’ t significant whereas the effect of storage duration was significant (p0.01). The highest essential oil content was obtained at 0.043% from the petals distilled immediately after the harvest while the lowest oil content was obtained at 0.022% from the petals stored at both temperatures for 28 days, respectively. The rate of citronellol, one of the main components of rose oil, was 25.34% in the petals distilled immediately whereas it varied from 41.07 to 72.52% in the petals stored at 0 oC and 3 oC for 28 days. The rates of nerol and geraniol in the petals distilled immediately were 14.30% and 33.02%, respectively whereas they are 2.68%, the trace amount, and range between 0.43 and 6.74% in the stored petals, respectively. The rates of hexadecane, nonadecane, eicosane and methyl eugenol in the petals distilled immediately were determined to be lower than those of the stored petals. The optimal results in terms of its oil content and components were obtained from the rose petals distilled immediately after the harvest as well as from the petals stored at 0 oC for 7 days.

Keyword: Rosa damascena, cold storage, essential oil content and composition ,

Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Erdal GONULAL, Suleyman SOYLU, Mehmet SAHIN

Abstract

A field experiment was conducted in the Wielkopolska region at the Gorzyń Research Station, Poland (52.34°N, 15.54°E) in Central Europe. The study was conducted over a 3-year period (2017, 2018, 2019) as a two-factorial design with four replications in the RCBD. The aim of the research was to determine the effect of the cultivar (‘Bolero’, ‘Tytan’) and the inoculation (Nitragina–seeds inoculation, Nitroflora I–seeds inoculation, Nitroflora II–soil inoculation, HiStick® Lupin–seeds inoculation) on plant development, seeds chemical composition and yielding of narrow-leaved lupin. The weather conditions and experimental factors significantly influenced on productivity of narrow-leaved lupin ‘Tytan’. Drought during the growing season reduced seeds and protein yields. After inoculation of HiStck the seeds yield was significantly greater by 12.4% (p < 0.01) and the protein yield after application of Nitroflora I or HiStick by 13.9% (p < 0.01) and 19.2% (p < 0.01), respectively. Correlation coefficients showed strong relations between number of pods and seeds per plant in both cultivars regardless of the inoculation variant, however the strongest relations in both cultivar were proved on HiStick treatment.
Keyword: Biological nitrogen fixation, chemical composition, legumes, protein efficiency, yielding