Nitrogen Fertilizer Affecting Herb Yield, Essential Oil Content and Compositions ofAgastache foeniculumPurch

2008 ◽  
Vol 11 (3) ◽  
pp. 261-266 ◽  
Author(s):  
R. Omidbaigi ◽  
M. Kabudani ◽  
M. Khoorang
Author(s):  
Çiğdem Sönmez ◽  
Hülya Okkaoğlu

Lavender as called Lavandula angustifolia Mill. is used for many purposes such as pharmaceutical, cosmetics etc industry. The aim of this study is to determine the effects of different harvest hours on yield, essential oil and essential oil yield in lavender. The research was conducted a randomized complete block design with three replications under Karaisalı/Adana ecological conditions. Flowering lavender plants were harvested every two hours starting from 8 am at five different times. The fresh herb yield, dry herb yield, drug flos yield, essential oil content and essential oil yield were determined in 2014 and 2015. The highest means were obtained from harvestings at 8 in morning when lowest means were recorded at harvesting at 14 in afternoon for both drug flos and essential oil yield in similar. Based on the results from research of two years, it was concluded that it would be suitable to harvest in early morning for obtaining high drug flos and essential oil yields.


2016 ◽  
Vol 75 (2) ◽  
pp. 260-265 ◽  
Author(s):  
Slavica Dudaš ◽  
Danijela Poljuha ◽  
Ivana Šola ◽  
Sabina Šegula ◽  
Sanja Varga ◽  
...  

Abstract The effects of a biodynamic sowing calendar on the growth (plant height, fresh herb yield, nodes number) and quality (percentage of leaf mass, essential oil content) of three basil species, Ocimum americanum L., Ocimum × hybrida and Ocimum basilicum L., represented by the cultivars ‘Rosso’ and ‘Eco Genovese’, were tested. Statistical analyses showed that the species had greater impact on the observed parameters than either the sowing date or the species and sowing date in combination. The species showed a significant influence on all five tested parameters, while sowing date and interaction of both factors significantly influenced plant height, leaf percentage and essential oil content. The best yield per plant was obtained for O. × hybrida and O. basilicum ‘Eco Genovese’. The lowest species O. × hybrida produced the highest amount of essential oil. »Nodes number« parameter most clearly separated the species, but not the cultivars. Even though O. americanum gave the tallest plants, it did not yield either the highest amount of fresh herb or essential oil. This species’ height was most consistent, considering the significant impact of biodynamic rhythm. Sowing date was not crucial for basil fresh yield; however if there is a need for taller plants with a higher percentage of leaf mass and more essential oil, sowing date needs to be controlled.


2012 ◽  
Vol 60 (2) ◽  
pp. 127-131 ◽  
Author(s):  
Renata Nurzyńska-Wierdak

Investigations carried out in 2005-2006 related to the growth, flowering, and yielding of selected basil (<i>Ocimum basilicum</i> L.) varieties. The most important biometric traits, number of days from sowing till flowering, size of fresh and air-dried herb weight, and essential oil content in dried material, were determined. Great morphological and developmental as well as chemical composition differentiation was found for studied basil varieties. Plants of 'Sweet' cv. were characterized by the largest height (53.4 cm) and side shoot number (16), 'Lemon' - by the largest plant diameter (42.3 cm). The number of days till flowering depended on weather conditions and the variety, and it amounted from 44 to 126. Basil flowers were white, pink, and violet. Herb yield depended on the variety and growth conditions. Differences in the amount and yield of essential oil from basil were also recorded. The largest amounts of oil (1.55%) were accumulated by 'Bush' cv.


2000 ◽  
Vol 6 (4) ◽  
Author(s):  
R. Omidbaigi ◽  
A. Rezaei Nejad

The influence of nitrogen-fertilizer applied in 0, 50, 100 and 150 kg/ha dosages, as well as the time of the harvest carried out in full flowering and early fruit set stages were studied on the herb and essential oil production of garden thyme (Thymus vulgaris L.). The small plot experiment was installed in the Experimental Field of Tarbiat Modarres University near Teheran, under sandy loam soil conditions. On the basis of the results the nitrogen-fertilizer had a significant effect on the dry-matter production of the species: the herb yield, calculated on one hectare, increased from 671.88 kg up to 1021.00 kg value as a result of 150 kg nitrogen dosage. The essential oil yield proved to have a similar tendency because neither the accumulation level of essential oil, nor the ratio of thymol were effected by the nutrient supply. Analyzing the effect of harvest time changes in both dry-mass production and essential oil accumulation were observed. The highest herb yield (1238.20 kg/hectare) was obtained in early fruit set, when about.50 per cent of fruits reached their full size in the inflorescence. The accumulation level of essential oil also reached its maximum at the sane development stage, showing 0.75 per cent value, which is about two fold higher comparing to the accumulation level was measured at the time of full flowering (0.41 %).


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