Rapid Field Multiplication of Banana Using Different Treatments

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An experiment on “Rapid field multiplication of banana using different treatments” was conducted at Instructional cum Research Farm, Department of Horticulture, Biswanath College of Agriculture, Assam Agricultural University, Biswanath Chariali to study the effect of different treatments on sucker production of banana and to evaluate the suitable treatment to increase the sucker production. Two varieties of banana i.e., Malbhog (AAB) and Amritsagar (AAA) were selected for the experiment. Eight treatments were laid out in randomized block design with three replications under field condition. The treatments were T1 (Natural sucker production), T2 (Decortication of sucker), T3 (Natural sucker production + BAP @ 3 ppm), T4 (Natural sucker production + BAP @ 6 ppm), T5 (Decortication of sucker+ BAP @ 3 ppm), T6 (Decortication of sucker + BAP @ 6 ppm), T7 (Natural sucker production + N @ 220 g/plant) and T8 (Decortication of sucker + N @ 220 g/plant) The result of the experiment revealed that emergence of first sucker was significantly influenced by different treatments. The first sucker emerged within a shortest period of 25.48 days in T6 (decorticated rhizome treated with BAP @ 6 ppm) and was at par with T5 (26.64 days). The maximum time required for sucker emergence after planting was recorded in T7 (31.88 days) which had no significance difference with T8 (31.85). The plants treated with T6 recorded the significantly highest number of sucker (9.00) per plant at 150th day after planting followed by 8.42 in T5 and lowest number of sucker (4.92) per plant was recorded in T1 (natural sucker production) at 150th day after planting. The height of suckers was found to increase gradually from 60th day (98.14 cm) to 150th day (147.50 cm) due to highly significant effect of T8 (decorticated rhizomes applied with N) followed by T7 (natural sucker applied with N) at 60th day (92.0 cm) to 150th day (139.50 cm). The girth of suckers also varied significantly due to different treatments and the highest girth of sucker at 60th day after planting was recorded in T6 (22.26 cm) while the highest girth at 90th day (29.12 cm) and at 120th day (36.34 cm) were observed in T5. But the girth of plants treated with T2 became larger (41.00 cm) at 150th day after emergence. There was no significant effect of any treatment or interaction effect between varieties and treatment on phyllochron of suckers The number of leaves of first sucker at 90th day after emergence was recorded to be highest (5.75) in T1 (natural sucker production) followed by 5.68 in T8 (decorticated rhizomes treated with N), 5.61 in T4 and 5.34 in T3. The highest weight of sucker (2.71 kg) was recorded in T1 followed by 2.68 kg in T6 (decorticated rhizomes treated with BAP @ 6 ppm) at 90th day after planting. Considering the shortest time taken for first sucker emergence (25.48 days), highest number of suckers (9.00) per plant, weight of the sucker (2.68 kg/sucker) and benefit:cost ratio of 2.36 in T6 (decorticated sucker treated with BAP @ 6 ppm) was found to be the most suitable treatment to increase the production of sizeable suckers within 3-4 months.