PEMBERIANBEBERAPA DOSIS KOMPOS KULIT KOPI TERHADAP PERTUMBUHAN BIBIT KARET (Hevea brasilliensis Muell Arg.) STUM MINI

Abstract

This research aims to get the best dosage of coffee rind compost to increase the growth of rubber seedling. This research has been conducted at Experimental Garden of Agriculture Faculty of University of Riau, kampus of Bina Widya km 12,5 Simpang Baru, Tampan, Pekanbaru from March to July 2017. This research was conducted experimentally using factorial randomized design, consisted of 5 treatments and 4 replications. The dosage of coffee rind compost were 0 ton/ha (0 g/polybag), 5 ton/ha (12,5 g/polybag), 10 ton/ha (25 g/polybag), 15 ton/ha (37,5 g/polybag) dan 20 ton/ha (50 g/polybag). The observed parameters in this research were steam length, number of leaves, wide of leaves, steam diameter, fresh weight, volume of root, rootshootratioanddry weight. The result shows that the giving application of coffee rind compost can to increase the growth of rubber seedling. The dosage of coffee rind compost 15 ton/ha (37,5 g/polybag) gave the best response in increasing steam length, number of leaves, fresh weight and dry wight.

Keywords: dosage, coffee rind compost, rubber