PJB-2022-460
IMPACT OF NANOPARTICLES OF ZINC, BORON, AND IRON ON FRUIT QUALITY AND YIELD OF OLIVE (Olea europaea) CV- CHEITINA
SHAMS ULLAH
Abstract
The deficiency of micronutrients is a prominent feature of Pothwar soils. It is one of the major causes due to which olive yield and quality is low in the region. The application of these nutrients in commercial olive production is therefore essential factor. Conventional application of these nutrients in chelated form has some issues regarding efficiency and losses. Nano-technology is one of the innovative practices in the field of horticulture. So the objective of the study was to find the suitable concentration of Nano-iron, Nano-zinc and Nano-boron for quality production of olives with better yield during the year 2021-22. Nanoparticles (Boron, Iron and Zinc) were sprayed individually at different concentrations i.e. Boron (20ppm, 30ppm L -1), Zinc (150ppm, 200ppm L-1), and Iron (100ppm, 150ppm L-1) in the form of foliar spray at different stages of growth and development of the tree i.e. during dormancy, before bloom and during bloom. Results indicated that application of boron, iron and zinc nanoparticles were able to improve the yield and quality of olive as compare to control treatments. Maximum values regarding canopy measurement, leaf area and fruit diameter were recorded by Fe treatment @ 150 ppm. B @ 30 ppm produced maximum number of flowers, fruit set, fruit volume, pulp to stone ratio and fruit shape index. While, higher yield was observed in the treatments of Fe @ 150 ppm and B @ 30. Oil quality markers i.e. acid value (%) and peroxide value (meq O2/kg) were reduced significantly by Zn @ 200 ppm and Fe @ 100 ppm respectively.
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