Pertumbuhan dan Produksi Marigold (Tagetes erecta L.) pada Berbagai Media Tanam dan Pemupukan Anorganik

Abstract

Marigold (Tagetes erecta L.) is an ornamental plant that is often cultivated and can be used as a botanical pesticide. This research was conducted at the Faculty of Agriculture, University of Sumatera Utara at an altitude of 25 m above sea level from February to May 2025. The study used a Factorial Randomized Block Design consisting of two factors with three replications. The first factor was various growing media, namely: top soil; top soil + rice husk biochar; top soil + oil palm empty fruit bunches; and top soil + goat manure. The second factor was fertilization, namely: without fertilizer application and NPK fertilizer application at 10 g/plant. The results showed that the treatment of top soil + goat manure growing medium produced the highest mean values for most growth and yield parameters. The top soil + rice husk biochar growing medium produced the highest mean values for wet and root dry weight parameters in the vegetative phase and root length in the generative phase. The top soil + oil palm empty fruit bunches growing medium produced the highest mean values for shoot root ratio in the generative phase. NPK fertilization at 10 g/plant produced the highest mean values for all growth and yield parameters. The interaction of top soil + goat manure growing medium with NPK fertilizer application at 10 g/plant produced the highest mean values for plant height, number of leaves, stem diameter, and number of fresh flowers per plant parameters.