RESPONSE OF DIFFERENT CONCENTRATIONS OF GROWTH REGULATORS ON ROOTING AND GROWTH OF ACID LIME [CITRUS AURANTIFOLIA (CHRISTM.) SWINGLE] AIR LAYERS UNDER GIRD REGION OF M.P.Ajay Dangi, K.S. Tomar, Arjun Kashyap, Kalyan Raghuwanshi and Rakesh Jat
Field trial conducted during the year of 2014-15 in the Department of Horticulture, College of Agriculture, RVSKVV Gwalior, (M.P.) to study the response of different concentrations of growth regulators on rooting and growth of acid lime [Citrus aurantifolia (Christm.) Swingle] air layers under Gird region of M.P. The experiment was laid out in randomized block design with three replications and 9 treatments viz., control, IBA 600 ppm, IBA 1200 ppm, IBA 1800 ppm, IBA 2400 ppm , NAA 600 ppm, NAA 1200 ppm, NAA 1800 ppm and NAA 2400 ppm. The result revealed that air-layering equally responded under both growth regulators in respect of all root and growth characters but in between the two growth regulators, IBA gave slightly better results as compared to NAA. Application of highest concentration of IBA (2400 ppm) followed by NAA 2400 ppm but in case of success of rooting percentage and length of shoots, IBA 1800 ppm and NAA 2400 ppm gave similar result and in case of callus formation and number of leaves / air layers IBA 1800 gave good result then NAA 2400 ppm. While IBA 2400 ppm and NAA 2400 ppm gave considerably better results as compared to lower concentrations (600 and 1200 ppm). maximum values is most of the roots and growth characters viz. callus formation (0.53 cm), success of rooting percentage (90.33), diameter of primary and secondary roots (1.50 mm) and (0.75 mm), dry weight of primary roots (2.62g), number of leaves / air layers (29.92), number of shoots/layer (7.70) and length of shoots (28.47cm) maximum values of all these root characters and callus formation with higher growth of air-layers were recorded from 2400 ppm IBA.
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