Research Article 
Rooting and Survival of Air Layers in Litchi as Influenced by Layering Time and Plant Growth Regulator
M.A. Rahman, M.N. Amin, M.S. Islam, M.M. Begum and M.A. Uddin
Pakistan Journal of Biological Sciences, 2002, 5(11), 1259-1260.
Abstract
Air layering on five different times with the help of indole butyric acid (IBA) at 1000, 1500, 2000, 2500, 3000 and 3500 ppm concentration was evaluated in BARI-1 variety of litchi. Five different dates of layering were 15 May, 01, 16 June, 01 and 16 July. It was observed that the number and average length of primary roots and survival of layers were markedly increased where layers were prepared on 01 and 16 June. Layers prepared with IBA at 2500 ppm produced the maximum number (27.14) and length (6.69 cm) of primary roots and obtained the highest percentage (77.66%) of success in the survivability of litchi layers. The best rooting performance and the final survival of air layers in the nursery after 90 days of severing was recorded to be the highest (90%) where layers were prepared on 16 June with IBA at 2500 ppm.
ASCI-ID: 1-2546
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