Peningkatan hasil panen jagung (Zea mays L.) menggunakan asam humat yang diperkaya produk-samping pabrik urea dan NPK

Abstract

The use of PSUC (liquid Urea by-product) and PSNC (liquid NPK by-product) in humic fertilizer enrichment is a strategic solution towards zero waste and to increase their value added. Maize is Indonesia's leading commodity with a low productivity. This study aimed to determine the effect of humic acid PSUC (HA-PSUC) and PSNC (HA-PSNC) on the growth and productivity of maize. Humic acid was formulated using PSUC and PSNC and then a quality assay was carried out. The experimental design was a completely randomized design with nine treatments. The application of humic acid using the foliar spray technique was carried out at 25, 39, and 53 days after planting (DAP). Growth observations were made at 24, 38, and 52 DAP, while yield and plant biomass were observed at 75 DAP. The data were analyzed using ANOVA test, with Tukey HSD as the further test. The quality assay results showed that those two products (HA-PSUC and HA-PSNC) meet the quality standards according to the Ministry of Agriculture Regulation No. 1 2019 with humic content of HA-PSUC respectively was 14.68% (liquid) and 38.51% (solid), while HA-PSNC was 15.97% (liquid) and 38.23% (solid). In general, each treatment tested showed an increase in plant growth characteristics compared to the control, with the best treatment is HcU-8 (humic acid liquid Urea at 8 L ha-1), especially in stem diameter and stem-leaf biomass. Each yield character in each treatment showed an increment compared to the control, with significant yield differences known in the parameters of fresh and dried corn cobs weight and grain weight per corn cob. However, among treatment groups did not show a significant difference in maize yields, so to increase cost efficiency with optimal yields, the applications of humic acid PSUC or PSNC at 8 L ha-1 or 8 kg ha-1 were the recommended doses.

Keywords

• humic acid
• maize
• growth
• productivity
• psnc
• psuc