UJI PENGARUH EKSTRAK ALANG – ALANG DAN KIRINYUH TERHADAP PERTUMBUHAN BIBIT TANAMAN TEBU (Saccharum officinarum L.)
The aim of this research is to know and learn about the influence of giving extract of speargrass ( Imperata cylindraca L.) and siam weed (Chromolaena odorata) leaf toward the growth of sugarcane seedlings. This observation use Random Group Design method with non factorial patterns that is use the type weed extract. The observation degree consist of 3 treatment that is P0 = control ( wi thout application of the extract ), P1 = application extract of speargrass on sugarcane seeds (100 grams per 500 ml of water), P2 = application extract of siam weed on sugarcane seeds (100 grams per 500 ml of water). Every treatment was repeated 3 times and each replication consisted of 3 polybag, so in total there are 27 polybags. Experiment’s results are gained by plant height, leaf quantity and dry weight on control plant (P0) are not significantly different with P1 and P2, but there is a tendency enhancement growth of plant height, leaf quantity and dry weight of plant especially in the treatment of P2 (extract of siam weed). Plant height of sugarcane with giving extract of siam weed that is 146,1 cm, leaf quantity 9,89 cm and dry weight of cane amounti n g to 30,47grams. This matter caused siam weed has a fairly high nutrient content (2,65% N, 0,53% P and 1,9% K) (Chandrashekar and Gajanana, 1996). Speargrass has the nutrient content of 1,97% N, 0,13% P, dan 1,65% K (Lubis, 1995) so that the plant height of giving extract of speargrass bigger is 143,27 cm higher than the control treatment which only has a plant height of 140,07 cm. The observation wet weight is known that giving of siam weed extract has the best treatment because i t has a highest average namely amounting 133,47 grams. This matter can be caused extract of siam weed able tohelptherootsoft plantspenetra the soil deeper and broader so that the plants are better.