Zeolite as a Tool to Recycle Nitrogen and Phosphorus in Paddy Fields under Straw Returning Conditions

Excess nitrogen (N) caused by straw returning to paddy fields undergoing flooding irrigation deteriorates the water quality. The purpose of this research was use both simulated field and pot experiments explore a new approach using zeolite recycle excess N. results from in stagnant showed N adsorption with different applications (25, 50, 75, 100, 125, 150 g L−1). Pot revealed how reused affected concentrations ammonia (NH4+-N), nitrate (NO3−-N), total (TN), phosphorus (TP) surface soil layers field. Zeolite strong ability adsorb NH4+-N wastewater, even drainage ditch (100 L−1 adsorbed 74% NH4+-N). recycled still able reduce concentration decomposition water. reduced peak values NH4+-N, TN, TP 30%, 19%, 5%, respectively. Based on these findings conventional designs, 20 t ha−1 is effective for recycling P. This provides sustainable development method mitigate quality deterioration