Effects of number of scions grafted and cut-down productive branches on the growth of new shoots in side grafting technique of cashew trees
2011
Suharto, I., Udyana Univ., Bali (Indonesia)
The productivity of cashew trees usually decline with age, and side grafting on the old trees are seen as a model of simple and inexpensive technique of rejuvenation to quickly improve the productivity. Series of experiments of the present main research entitled 'Side grafting technique as cashew rejuvenation model' will be conducted to study this problem. The first experiment was conducted in the field at cashew centre areas in Lewobele Village, Larantuka East Flores Regency, NTT Province, Indonesia from May to July 2010. Two treatment factors (number of scions grafted and number of cut down productive branches per tree) were factorially arranged in a randomized complete block design (RCBD)experiment.One (S1) and two scions (S2) were grafted per tree, and all productive branches were cut down (P1), two (P2) and three (P3) productive branches were left on the tree. Fifty four cashew trees of 18 months old were used as root stocks and eighty one healthy scions originated from the centre nursery were used in grafting. The results of the first experiment showed that 100% scions were grown well, indicated that side grafting was a simple and inexpensive technique to rejuvenate cashew trees due to fully compatible scions and root stock. The interaction treatment between two scions grafted per tree and two productive branches left on the tree (S2P2)resulted in the highest (50%) percentage of new-growth branches that have been flowering at 7 weeks after grafting, which was significantly different (p0.05) from the other combination treatments. The result of this first experiment is being used to support the main research, which will be completed in December 2010.
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