“Effect of graded levels of Nitrogen and Humic Acid on Growth, Yield and Quality of Essential Oil derived from herbage of marigold (Tagetes Patula L.) cv. Arka Pari”
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Date
2023-01-28
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College of Horticulture and Forestry, Central Agricultural University, Pasighat -791102 Central Agricultural University (Imphal)
Abstract
The experiment was laid out in factorial randomized block design with three levels of Humic acid (Control, 20 kg/ha and 40 kg/ha) and four levels of Nitrogen (Control, 100 kg/ha, 150 kg/ha and 200 kg/ha) which was replicated thrice. The observations were recorded in respect of vegetative growth parameters, flowering parameters, yield parameters and quality parameters.The significantly maximum height of plant, number of primary and secondary branches/ plant, plant spread, stem diameter, leaves/plant, fresh weight of leaves and plant and leaf area were recorded in Humic acid 40 kg/ha as well as Nitrogen 200kg/ha.The flowering parameters in term of days taken to bud initiation, days to flower bud maturity, days to first flowering, days to 50% flowering and days to first harvest was significantly minimum with Humic acid 40 kg/ha as well as Nitrogen 200kg/ha. Whereas, significantly maximum duration of flowering was recorded in Humic acid 40 kg/ha as well as Nitrogen 200kg/ha.The yield parameters in respect of number of flowers/ plant, fresh weight of flowers, flower yield/ plot and flower yield/ plant, were recorded significantly maximum in Humic acid 40 kg/ha as well as Nitrogen 200kg/ha. Whereas, the highest essential oil yield was observed in Humic acid 40 kg/ha and Nitrogen 150 kg/ha.The quality parameter in respect of flower diameter were recorded maximum in Humic acid 40 kg/ha as well as Nitrogen 200kg/ha.The chemical compositions of hydrodistilled essential oil from the herbage of Tagetes patula cv. Arka Pari were analysed using GCMS (Gas chromatography- Mass spectrometry). The major compounds identified were D- Limonene, cis β- ocimene, trans β- ocimene, Dihydrotagetone, 2- carene, (Z)- myroxide, (E)- Tagetone, (Z)- Tagetone, Levoverbenone, Piperitone, Piperitenone, 3- Carene-5-one, Caryophyllene and Germacrene D.
Description
Marigold (Tagetes patula L.), has a good demand in the world market for its essential oil.Nitrogen nutrition have a big impact on essential oil biosynthesis and humic acid enhances soil fertility and increases nutrient availability to plants, influencing plant development and production.With this backgroundthe present investigation was undertaken at the field near orchideria, Department of Floriculture and LandscapeArchitecture, College of Horticulture and Forestry, CAU (Imphal), Pasighat, Arunachal Pradesh during the year 2021-22.