Growth and yield characteristics of soybean on the usage of several varieties and fertilizers N, P, K in tidal lowland

Abstract

Abstract The increasing soybean production by expanding areas to marginal land, such as tidal lowland, has became the target of Indonesian government. The objective of the research was to select several varieties of soybeans and the appropriate dosage of N, P, K fertilizers to increase the soybean growth and yields characteristics. This research was conducted at tidal lowland in Sei Ular Village, Secanggang sub-District, Langkat District from July to December 2019, use a factorial randomized block design with two factors and three replications. The first factor is soybean varieties (Anjosmoro; Deja-1; Dena-1 and Dering-1). The second factor is application of N, P and K fertilizers at dosage namely un-fertilizer; 50kgha−1 N, 40kgha−1 P2O5, 50kgha−1 K2O; 100kgha−1 N, 80kgha−1 P2O5, 100kgha−1 K2O and 150kgha−1 N, 120kgha−1 P2O5, 150kgha−1 K2O. The result of the research showed that the soybean varieties significantly differ affected on the plant height of soybeans at 30 DAP, volume and length of root in tidal lowland. The dosage of N, P, K fertilizers were significantly different on the plant height and root length, and their interactions significantly different on the shoot root ratio.