Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 125, Issue -, Pages 186-197Publisher
ELSEVIER
DOI: 10.1016/j.indcrop.2018.08.047
Keywords
Field capacity; Nutrient; Leaf; Volatile oil; Aromatic compounds
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Ocimum gratissimum L. (clove basil) is a popular medicinal plant with vast potential for use in the pharmaceutical, cosmetic and food industries. The effects of different water application rates, 60% (I-60), 70% (I-70), 80% (I-80), 90% (I-90), 100% (I-100) and 110% (I-110) of field capacity (FC), and nitrogen fertilization, 0 (N-0), 40 (N-2), 80 (N-4) and 160 (N-8) kg of nitrogen/ha, on growth and essential oil of this species were studied. The experiment was carried out for 60 days in a greenhouse in a completely randomised design with three replicates. The isolated volatile constituents were analysed by GC MS. There was a significant (P < 0.05) effect on the growth and production of O. gratissimum essential oil for water application rate, nitrogen and the interaction between these two factors. The maximum values of width (8.3 cm), length (11.5 cm) and number of leaves (301.3), leaf dry matter (52.5 g/plant), essential oil content (1.58%) and oil yield (82.9 mL/plant) were obtained in the I110N8 treatment. Twenty compounds were identified in each clove basil essential oils with predominance of phenylpropanoids in the 1(110)N(8) treatment and of monoterpenes in the other treatments. A water application rate above field capacity together with nitrogen doses higher than normally recommended improves plant growth and increases the production of its essential oil by modifying the metabolic pathway.
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