A Study of Different Irrigation Practices Used for<i>Mentha piperita</i>in Bulgaria

Nedkov, N.; Georgiev, G.

doi:10.1080/10412905.1991.9697979

Cited by 6 publications

(3 citation statements)

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“…It has been reported that the essential oil accumulation in peppermint could be influenced by environmental factors such as photoperiod (Clark and Menary, 1979b), Menary, 1980a, 1980b), light (Burbott and Loomis, 1967), and agronomic factors such as soil amendments, nutrients, or trace elements (Alkire and Simon, 1995;Mustiatse, 1985;Nedkov and Georgiev, 1991;Scavroni et al, 2005;Zheljazkov, 2005;Zheljazkov and Margina, 1996;Zheljazkov and Nielsen, 1996). Nitrogen is one of the most important modifiers of peppermint productivity and oil composition (Clark and Menary, 1980c;Jeliazkova et al, 1999;Kothari and Singh, 1995;Mitchell and Farris, 1996;Piccaglia et al, 1993;Singh et al, 1989).…”

Section: Resultsmentioning

confidence: 99%

“…The essential oil content and composition of peppermint are important economically for producers, processors, manufacturers of peppermint-containing products, and for consumers. Prior research has shown that environmental factors such as harvest date and photoperiod Menary, 1979a, 1979b), latitude and growing conditions (Topalov, 1962), soil contamination (Zheljazkov et al, 2006;Zheljazkov and Nielsen, 1996), soil amendments (Zheljazkov, 2005;Zheljazkov and Warman, 2004), and agronomic practices such as harvest stage (Clark and Menary, 2006), irrigation (Nedkov and Georgiev, 1991;Ram et al, 1995;Topalov, 1962), pesticide application (Zheljazkov and Margina, 1996), or fertilization (Mitchell and Farris, 1996;Scavroni et al, 2005;Topalov, 1962) influence peppermint essential oil content and composition. The climate in the northwestern United States is considered suitable for the production of high-quality peppermint essential oil.…”

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Effect of Nitrogen, Location, and Harvesting Stage on Peppermint Productivity, Oil Content, and Oil Composition

Zheljazkov¹,

Cerven²,

Cantrell³

et al. 2009

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Peppermint (Mentha ×piperita) is currently not a common crop in the southeastern United States. Recently, there has been an interest in peppermint as an essential oil crop for this region. In 2007, a field experiment was conducted in Mississippi to determine the effect of nitrogen (N) (0 and 80 kg·ha−1), location (Verona and Stoneville), and harvesting stage (bud formation and flowering) on peppermint productivity, oil content, and composition. Peppermint biomass yields were higher at Verona (8.12 t·ha−1) than at Stoneville (6.12 t·ha−1). However, the essential oil content was higher at Stoneville (1.1%) than at Verona (0.6%). Generally, N rate at 80 kg·ha−1 did not affect oil yield and composition compared with 0 kg·ha−1. The concentrations of the major essential oil constituents were: (-)-menthol at 26% to 30%, (-)-menthone at 14% to 21%, (+)-menthofuran at 5% to 11%, and eucalyptol at 3% to 4% of total essential oil (wt/wt) and were generally within the values previously reported. The concentrations of (-)-menthone and (+)-menthofuran were significantly higher at Stoneville, 21% and 11%, respectively, than at Verona (14% and 6%). The (-)-menthol, (-)-menthone, and (+)-menthofuran yields/ha were higher at Stoneville than at Verona. Overall oil content and yields were higher at bud formation than at flowering, 1.3 and 1.8 times, respectively. In addition, the concentration of (-)-menthone and eucalyptol and the yields of (-)-menthone, (+)-menthofuran, and eucalyptol were higher at bud formation than at flowering. The results from this study demonstrated peppermint can be successfully grown in Mississippi and provide essential oil yields and composition comparable to those in the northwestern United States, the traditional peppermint-growing region.

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Section: Resultsmentioning

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confidence: 99%

Effect of Nitrogen, Location, and Harvesting Stage on Peppermint Productivity, Oil Content, and Oil Composition

Zheljazkov¹,

Cerven²,

Cantrell³

et al. 2009

horts

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“…Hazra et al (1990) indicated that drying in direct sunlight needs 24 % less steam than required during distillation. Nedkov and Georgiev (1991) said that spearmint, is a major essential oil plant. Dried leaves are used for various blends of tea which are reputed to have medicinal properties.…”

Section: Introductionmentioning

confidence: 99%

Different Methods to Extract Volatile Oil From Leaves of Different Medical Plants

Ebaid

2011

Journal of Soil Sciences and Agricultural Engineering

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The object of the present study was to investigate the effect of different drying methods on percentage and components of volatile oil distilled from some aromatic plants leaves. The natural sun drying at 30°C ±1 and the artificial drying using artificial batch dryer are the two different methods used to dry the leaves. Drying methods were carried out under three different levels of air temperature (35, 40 and 45 o C), and air velocity of (2 m/s), for different plants spearmint (Mentha viridis L.), sage (Salvia officinalis L.), and sweet basil (Ocimum basilicum, L. var. basilicum). The obtained results indicated that:-1-In natural drying, moisture content decreased from 88.7 to 13.7 %, 85.6 to 14.1 % and 89.2 to 13.9 % at drying time of 42, 46 and 44 hours for spearmint, sage and sweet basil, respectively. 2-In artificial drying the recorded drying times at drying air temperature of 35, 40 and 45 o C were 18, 16 and 14 hours for spearmint 20, 18 and 16 hours for sage, and 20, 18 and 16 hours for sweet basil moisture content decreased from 88.7 to 13.7 %, 85.6 to 14.1 % and 89.2 to 13.9 % for spearmint, sage and sweet basil, respectively. 3-Percentage of volatile oils distilled from the leaves of the studied aromatic plants, varied and it decreased as the drying air temperature increased over 40 o C. 4-The optimum distillation time to distillate volatile oils for dry leaves from spearmint, was one hour, while it was two hours for sage and sweet basil. 5-The maximum percentage of volatile oil components were obtained from artificial drying at 40 o C and sir velocity of 2 m/s. 6-Artificial drying of the studied plants at drying air temperature of 40 o C is recommended for shorter drying time, higher percentage of volatile oil, and getting dried plants without contamination.

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