Harvest management in rose-scented geranium (pelargoniumsp.) for higher essential oil yield and superior quality under semi-arid tropics

2004 ◽  
Vol 50 (6) ◽  
pp. 593-600 ◽  
Author(s):  
SK Kothari ◽  
Y Vijay Kumar ◽  
AK Bhattacharya ◽  
S Ramesh
2021 ◽  
Vol 5 (2) ◽  
pp. 505-514
Author(s):  
Gülen ÖZYAZICI

This study was carried out to determine the effects of different combinations of chemical and organic fertilizers on yield and essential oil ratio in coriander plant. Research, 2019-2020 vegetation period situated in Turkey's semi-arid climate prevails that was conducted in Southeastern Anatolia Region Siirt conditions. A total of 11 subjects, different combinations of chemical and organic fertilizers, formed the subject of the study in the study, which was established with 3 repetitions according to the randomized blocks trial design. According to the results of the research, the effect of chemical and organic fertilizer combinations on plant height and essential oil ratio in coriander plant is statistically insignificant. The number of seeds in the main umbrella and biological yield at p<0.05 level, the number of umbellet in the main umbrella, harvest index, seed and essential oil yield at p<0.05 level were statistically significant. In the research, the highest number of umbellet and seeds in the main umbrella were vermicompost (100%), harvest index (50% NPK + 50% chicken manure), seed yield (50% NPK + 50% chicken manure and 75% NPK + 25% chicken manure) and essential oil yield (50% NPK + 50% chicken manure). According to the research subjects, the plant height is 64.37-75.90 cm, the number of umbellet is 5.40-6.27 in the main umbrella, the number of seeds in the main umbrella is 32.47-41.53, the biological yield is 411.83-687.90 kg/da, the seed yield is 101.05-186.91 kg/da, harvest index, 22.23-36.28%, essential oil rate 0.30-0.32%, essential oil yield varied between 0.30-0.60 L/da. It was concluded that chemical fertilizer and organic fertilizer applications in coriander cultivation in semi-arid climatic conditions increase yield and some yield criteria.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Huimin Zhang ◽  
Hongguang Yan ◽  
Quan Li ◽  
Hui Lin ◽  
Xiaopeng Wen

AbstractThe floral fragrance of plants is an important indicator in their evaluation. The aroma of sweet cherry flowers is mainly derived from their essential oil. In this study, based on the results of a single-factor experiment, a Box–Behnken design was adopted for ultrasound- and microwave-assisted extraction of essential oil from sweet cherry flowers of the Brooks cultivar. With the objective of extracting the maximum essential oil yield (w/w), the optimal extraction process conditions were a liquid–solid ratio of 52 mL g−1, an extraction time of 27 min, and a microwave power of 435 W. The essential oil yield was 1.23%, which was close to the theoretical prediction. The volatile organic compounds (VOCs) of the sweet cherry flowers of four cultivars (Brooks, Black Pearl, Tieton and Summit) were identified via headspace solid phase microextraction (SPME) and gas chromatography–mass spectrometry (GC–MS). The results showed that a total of 155 VOCs were identified and classified in the essential oil from sweet cherry flowers of four cultivars, 65 of which were shared among the cultivars. The highest contents of VOCs were aldehydes, alcohols, ketones and esters. Ethanol, linalool, lilac alcohol, acetaldehyde, (E)-2-hexenal, benzaldehyde and dimethyl sulfide were the major volatiles, which were mainly responsible for the characteristic aroma of sweet cherry flowers. It was concluded that the VOCs of sweet cherry flowers were qualitatively similar; however, relative content differences were observed in the four cultivars. This study provides a theoretical basis for the metabolism and regulation of the VOCs of sweet cherry flowers.


Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1397
Author(s):  
William N. Setzer ◽  
Lam Duong ◽  
Trang Pham ◽  
Ambika Poudel ◽  
Cuong Nguyen ◽  
...  

Virginia mountain mint (Pycnanthemum virginianum) is a peppermint-flavored aromatic herb of the Lamiaceae and is mainly used for culinary, medicinal, aromatic, and ornamental purposes. North Alabama’s climate is conducive to growing mint for essential oils used in culinary, confectionery, and medicinal purposes. There is, however, a need for varieties of P. virginianum that can be adapted and easily grown for production in North Alabama. Towards this end, four field-grown varieties with three harvesting times (M1H1, M1H2, M1H3; M2H1, M2H2, M2H3; M3H1, M3H2, M3H3, M4H1, M4H2, M4H3) were evaluated for relative differences in essential oil yield and composition. Thirty-day-old greenhouse-grown plants of the four varieties were transplanted on raised beds in the field at the Alabama A & M University Research Station in North Alabama. The plots were arranged in a randomized complete block with three replications. The study’s objective was to compare the four varieties for essential oil yield and their composition at three harvest times, 135, 155, and 170 days after planting (DAP). Essential oils were obtained by hydrodistillation with continuous extraction with dichloromethane using a Likens–Nickerson apparatus and analyzed by gas chromatographic techniques. At the first harvest, the essential oil yield of the four varieties showed that M1H1 had a yield of 1.15%, higher than M2H1, M3H1, and M4H1 with 0.91, 0.76, and 1.03%, respectively. The isomenthone concentrations increased dramatically through the season in M1 (M1H1, M1H2, M1H3) by 19.93, 54.7, and 69.31%, and M3 (M3H1, M3H2, M3H3) by 1.81, 48.02, and 65.83%, respectively. However, it increased only slightly in M2 and M4. The thymol concentration decreased slightly but not significantly in all four varieties; the thymol in M2 and M4 was very high compared with M1 and M3. The study showed that mountain mint offers potential for production in North Alabama. Two varieties, M1 and M3, merit further studies to determine yield stability, essential oil yield, composition, and cultivation development practices.


2002 ◽  
Vol 14 (4) ◽  
pp. 243-246 ◽  
Author(s):  
Katja S. Rissanen ◽  
Abbas Aflatuni ◽  
Päivi H. Tomperi ◽  
Jorma E. Jalonen ◽  
Kari M. Laine

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