Reducing Ammonia Volatilization from Urea Fertilizer Applied in a Waterlogged Tropical Acid Soil via Mixture of Rice Straw and Rice Husk Biochars

Authors : Gunavathy SELVARAJH, Huck Ywıh CHNG

Pages : 269-277

Doi:10.15832/ankutbd.836980

View : 17 | Download : 7

Publication Date : 2022-04-25

Article Type : Research Paper

Abstract :Nitrogen deficiency frequently occurs in agricultural soil because of ammonia volatilization to the environment, resulting in low urea-N use efficiency by plants. A laboratory incubation experiment was conducted to assess the effect of rice straw and rice husk biochar’s on ammonia volatilization, soil pH, exchangeable ammonium, and available nitrate in comparison to the urea without additives under waterlogged conditions. Application of rice straw and rice husk biochar’s mixture at application rate 5-10 t ha-1 had significantly minimized ammonia volatilization by 30.86% - 38.61% over T1 insert ignore into journalissuearticles values(175 kg ha-1 urea);. T2 insert ignore into journalissuearticles values(5 t ha-1); and T3 insert ignore into journalissuearticles values(10 t ha-1); also had significantly increased retention of ammonium by 79% - 95% and nitrate ions by 49% - 51% over control. The treatments amended with biochar had successfully improved soil pH compared to T0 insert ignore into journalissuearticles values(soil only); and T1. Hence, the findings suggest that urea amended with rice straw and rice husk biochar’s altered the nutrients level in the soil by minimizing ammonia loss to enhance nitrogen availability in waterlogged conditions.
Keywords : Ammonia volatilization, Biochar, Nitrogen, Urea, Ammonium