Improvement of phosphatic fertilization method in soybeans (Glycine max L.) cultivation

Abstract

Abstract The efficiency of phosphatic (P) fertilization in seasonal crops is commonly low, and most of the residual fertilizer remains in the soil. Increasing the efficiency of phosphate fertilizer is urgent to reduce its contribution to the warming climate, hence promoting climate change. Increasing the efficiency may be done by applying fast soluble phosphate (FSP) fertilizer which is applied in split application method. The research aimed to assess the growth response of soybean to the application of fast soluble P fertilizer and obtain a more efficient P fertilization method for soybean in potentially P-binding soils, Alfisol. This research was conducted using potted Alfisols of Jumapolo Karanganyar treated with several doses of slow and fast soluble P fertilizers which were arranged in a factorial design. This research concluded that FSP fertilizer in Alfisol has increased growth and P uptake of soybean. The treatment of FSP fertilizer at the dose of 100 kg ha-1 produced soybean biomass significantly higher than the application of slow-released Superphosphate (SP36) fertilizer at 150 kg ha-1. The application of FSP also increased the uptake efficiency of P fertilizer and agronomic efficiency compared to the use of SP36 fertilizer.