| dc.description.abstract | Sunflower (Helianthus annuus L.) is an oil-producing crop of high
economic value; however, its productivity in Indonesia remains relatively low,
necessitating improvement efforts through the selection of appropriate varieties
and growing media. This study aimed to examine the effects of different growing
media on the growth and yield of two sunflower varieties. The research was
conducted at the Faculty of Agriculture field from March to June 2025, using a
factorial Randomized Block Design with two factors. The first factor was two
sunflower varieties, namely IPB BM1 and Helina IPB. The second factor was
growing media consisting of 100% topsoil ; topsoil + sand ; topsoil + cocopeat ;
topsoil + oil palm empty fruit bunches ; topsoil + rice husk charcoal. The results
showed that the IPB BM1 variety exhibited greater plant height, number of leaves,
stem diameter, fresh and dry shoot weight, and flower diameter compared to Helina
IPB. The topsoil + cocopeat medium produced the highest averages for plant
height, stem diameter, and flower diameter, while topsoil + rice husk charcoal
resulted in the highest seed weight per plant. The topsoil + EFB medium also
supported better leaf area and root development. The interaction between the IPB
BM1 variety and the topsoil + cocopeat medium produced the highest averages for
plant height, number of leaves, stem diameter, fresh and dry shoot weight, and
flower diameter, whereas Helina IPB combined with topsoil + rice husk charcoal
produced the highest seed weight per plant. | en_US |
