Influence of IBA Concentrations on the rooting Response of Olive Cultivars in Air-Layering
Influence of IBA Concentrations on the rooting Response of Olive Cultivars in Air-Layering
Riaz Alam1*, Muhammad Sajid2 and Durri Shahwar3
ABSTRACT
The research trial to evaluate the “Influence of IBA concentrations on the rooting response of olive cultivar in air-layering” was conducted at Olive Model Farm, Sangbhatti, Mardan-Pakistan during the year 2015 using Randomized Complete Block Design (RCBD). Air layering was practiced in cultivars: Frontoio, Manzanilla, Pendolino, Ottobratica and Picual during monsoon season. The de-barked portions at the terminal sides were applied with 0, 1000, 2000, 3000 and 4000 ppm IBA solution with the help of dropper. The daughter saplings of cultivar Manzanilla produced through air-layering by the application of IBA in various concentrations, produced early rooting (36.00 days), high rooting percentage (77.47%), maximum number of roots (6.38) per layering, root length (7.03 cm), root weight (2.62 g) and more number of re-sprouts (5.57), followed by number of days to root appearance (38.80), rooting percentage (65.73%), number of roots (5.69) and root length (6.14 cm) produced by the saplings of cultivar Frontoio. The layering treated with 2000 ppm IBA solution took less days to root appearance (35.13), accomplished 72.00% rooting success, generated 5.85 number of roots per layering with 6.65 cm length, 2.47 g root weight and 4.89 number of re-sprouts and 7.00 cm shoot length while the untreated saplings took maximum days to root appearance (50.40) and lowest rooting percentage (47.07%), and minimum number of roots (3.50) per layering, root length (3.93 cm), root thickness (2.28 mm), root weight (1.46 g), number of re-sprouts (3.21) per layering and shoot length (4.81 cm) were produced in daughter saplings treated with 4000 ppm IBA solution. It is concluded that the layerings of cultivars Frontoio, Manzanilla and Picual treated with 2000 ppm IBA showed better results for the studied attributes while Ottobratica and Pendolino responded efficiently to all these attributes, when treated with 1000 and 3000 ppm IBA solution respectively.
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