Effect of Applying Different Levels of Nitrogen Fertilizer on Growth and Essential Oil of Chamomile (Matricaria chamomilla L.)

Abstract

High nitrogen input is important to guarantee higher production and essential oil yield. Ecologically, it is necessary to determine whether reduced nitrogen levels have an impact on the medicinal herbs’ productions. In the recent research, the influences of reduced nitrogen supply on the agronomic traits and essential oil productivity of chamomile have been evaluated. The experiment pots were set, and five levels of nitrogen fertilizer Urea (0, 25, 50, 75, and 100 kg N/ha) have been applied to the soil during the growing season. As a result, Chamomile growth, flower, essential oil content and yield were significantly increased when urea was applied as 75 kg N/ha. As a result, this research illustrates that reducing nitrogen supply might be a promising environmentally friendly way and an alternate strategy for improving the essential oil of chamomile and perhaps other medicinal plants, while also helping the environment.

GC–MS Combined with Fast GC E-Nose for the Analysis of Volatile Components of Chamomile (Matricaria chamomilla L.)

“…The yield of essential oil from chamomile has always been a concern in agricultural science and the commodity economy, as higher content of volatile oils in chamomile is generally considered indicative of better quality [ 24 ].The essential oil content of 18 batches of chamomile herbs ranged from 0.43% to 1.38%, with an average of 0.80%. The average essential oil contents of chamomile samples from different areas were 0.87% for Xinjiang, 1.02% for Shandong, 0.52% for Hebei, and 0.87% for Germany.…”

“…Our research confirmed the existence of these components in different chamomile samples, suggesting that these compounds can serve as identification markers for chamomile. Additionally, differences in the volatile oil content of chamomile were discovered; the SD samples exhibited the highest concentrations of chamazulene and bisabolol, indicating superior quality [ 24 ]. PCA analysis based on GC–MS indicated that volatile oil components could be used to distinguish chamomile samples.…”

Effect of Laser Radiation on the Phenotypic Mutations of Drosophila melanogaster (Diptera:Drosophilidae)

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This study was conducted to find out the effect of 5 periods of exposure to laser rays (0,15,10,5,20) minutes on the phenotypic mutations of Drosophila melanogaster, as well as calculating the percentage of mortality and the percentage of larval failure. The results showed that laser beams had significant effects in causing mutations, especially in the 15-minute period, which amounted to 0.33 and thus formed significant differences compared to the control group.

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