Evaluation of Clones For Scion and Dosage of NPK Fertilizer on Side Grafting of Smallholder Cacao

Bambang Eka Tjahjana, Yulius Ferry

Abstract


The productivity of cacao in Indonesia is still low, as most of cacao plants in farmers’ plantation have grown old. Rejuvenation of old cacao plants needs a lot of cost and time, therefore, it requires a cheaper and faster alternative. One of the alternatives is rehabilitation through side grafting using scion from superior clones. The study was aimed to know the effect of ten cacao clones as scion and dosage of NPK fertilizer for side grafting of cacao plants. The research was conducted in cacao plantation, Way Kanan district, North Lampung, from 2012 to 2013. The split plot design with three replications was used in this study; with the main plot factor was the 10 cacao superior clones as scion i.e. K1 = PA150, K2 = Sca12, K3 = TSH 908, K4 = ICS60, K5 = TSH 858, K6 = IMC67, K7 = Sulawesi 02, K8 = Jumbo, K9 = Sulawesi 01, and K10 = ICCRI 04. The subplot factor was the NPK fertilizer dosage, i.e. P0 = without fertilizer, P1 = 300 g NPK, P2 = 600 g NPK, and P3 = 300 g NPK + 100 g mycorrhiza. Each of the expeimental unit consisted of 6 plants. The variables observed were the success level of side grafting, growth of shoot length and diameter of shoot stem. The results showed that the best success level and growth of shoot length of side grafting for cacao plantation in Way Kanan district, North Lampung was using scion obtained from TSH 908 and TSH 858 clones. Meanwhile, the optimal dosage of NPK fertilizer was 600 g/plant/year and 300 g/plant/year + 100 g mycorrhizal/plant.


Keywords


Cacao; rehabilitation; superior clones; fertilizer dosage; side grafting

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DOI: http://dx.doi.org/10.21082/jtidp.v3n2.2016.p109-116

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