TANGGAP PERTUMBUHAN DAN PRODUKSI BEBERAPA VARIETAS KEDELAI (Glycine max L.) TERHADAP PERBANDINGAN KOMPOSISI PUPUK

Abstract

The use of organic fertilizer is needed to replace the role of chemical fertilizers, preserving the environment and for sustainable agriculture. The study was conducted in Tanjung Sari, Kecamatan Medan Selayang. The research used a Randomized Block Design with two factors. The first factor is varieties (Argomulyo, Burangrang and Anjasmoro). The second factor is the ratio of chemical fertilizers and vermicompost, which include : chemical fertilizer 0% + vermicompost 100%, chemical fertilizer 25% + vermicompost 75%, chemical fertilizer 50% + vermicompost 50%, chemical fertilizer 25% + vermicompost 75%, and chemical 100% + vermicompost 0%. The result showed that Varieties significantly affected the parameters amount of produtive branch, weight of dry plant, weight of dry root, the number of pods per plant, the number of filled pods per plant, weight of dry seed per sample,and weight of 100 seeds. Varieties did not significantly affect the parameters weight of dry seed per plot. The composition ratio of fertilizers significantly affected the parameters weight of dry root, weight of dry seed per sample,and weight of 100 seeds. In addition, the ratio of chemical fertilizers and vermicompost did not significantly affect the parameters amount of produtive branch, weight of dry plant, the number of pods per plant, the number of filled pods per plant,and weight of dry seed per plot. The interaction between varieties and the ratio of chemical fertilizers and vermicompost did not significantly affected for all parameters. Key words : varieties, chemical fertilizers, vermicompost, soybean ABSTRAK