Effect of Nano-Micronutrients Rate on Growth, Flowering and Chemical Constituents of Lavender (Lavandula officinalis, Chaix.) Plant Grown Under Salinity Stress
Keywords:Lavandula officinalis, soil salinity, nano-micronutrients, growth, flowering, chlorophyll
The current study was carried out during the two consecutive seasons of 2019 and 2020 at the Experimental Farm of EL-Quassasin Horticultural Research Station, Ismailia Governorate, Egypt. a factorial experiment was set up on a randomized complete design with 3 replications was planned to study the influence of different nano-micronutrients rate (0.0, 250, 500 and 1000 ppm) and different soil salinity levels (0.0, 1000, 2000 and 3000 ppm) as well as their interaction treatments on growth parameters, salt resistance index, flowering, volatile oil production as well as total chlorophyll and proline contents in the leaves. Nano- micronutrients named "Magro NanoMix" which contained (Fe at 6%, B at 2%, Zn at 6%, Mn at 5%, Mo at 0.1% and Cu at 1%) were used. The obtained results referred to that lavender growth (plant height, branch number per plant, root and herb fresh and dry weights), flowering characters (spike length, number of inflorescences per plant and number of florests per inflorescence), volatile oil producing (volatile oil percentage and
yield per plant) and leaves total chlorophyll were descendingly decreased with increasing soil salinity level comparing with the control means in both seasons, but they were progressively increased as the concentration of nano-micronutrients was increased. Salt resistance index percentage of Lavandula officinalis plants enhanced to rich more 100 % under 1000 ppm soil salinity combined with 500 or 1000 ppm of nano-micronutrients compared to the other combination treatments.
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