Study of the Nutrient Uptake Patterns for the Better Use of Controlled Release Compound Fertilizer in Rice Plant

Abstract

This research aimed to enhance the efficiency of controlled release fertilizers (CRF) by analyzing nutrient uptake patterns of nitrogen (N), phosphorus (P) and potassium (K) in rice plants and modifying the shape and contact surface area of the fertilizer. The study employed a descriptive-exploratory approach, commencing with a literature review and qualitative research. Two rice field locations, Rice Field A in Katapang-Soreang District and Rice Field B in South Margahayu, Bandung Regency, West Java, were selected based on physiographic approach. Sampling point were determined and weekly plant samples were collected from each rice field for quantitative analysis. Key variables included the uptake of N, P and K, supported by ancillary variables such as initial soil analysis and dry weight of rice plants. Nutrient uptake data serves as a reference for modification, involving weekly accumulation calculations of nutrient requirements until week 10. Curve fitting was then performed to find a suitable polynomial equation, followed by applying a differential mathematical model to visualize the fertilizer's form. Validation of the similarity between Rice Fields A and B was conducted through soil analysis, statistical tests on the dry weight of rice plants and nutrient uptake. The research results indicated that the soil chemical properties in both rice fields were within normal ranges. Plant age variation influenced the dry weight of rice plants and nutrient uptake rates. The equation of a third-order polynomial curve has been identified as a reference equation in the application of differential models to modify and visualize the form of fertilizers. This study provides insights into the development of more efficient CRF which has the potential to contribute to global rice farming productivity and environmental sustainability.