Controlled-release N fertilizer to mitigate ammonia volatilization from double-cropping rice

Abstract Controlled-release nitrogen fertilizer (CRNF) can effectively enhance crop yields and raise the efficiency of in agroecosystems. In present study, volatilization NH 3 was determined by airflow enclosure chamber technique after application different CRNF rates double-cropping rice fields southern China for continuous years. The early late season (ESR LSR) were cultivated each year. results showed that total losses ranged from 25 to 56 kg N ha ?1 ESR 32 61 LSR. loss applied 12 29% 27% significantly reduced cumulative 20–43% 20–32% LSR compared with conventional urea application. less effective reduce than ESR. Furthermore, 80% rate form gave higher grain yield apparent recovery (ANRE) 100% urea. volatilization, increase ANRE. Considering price CRNF, at lower (20% N) may be a reasonable fertilization strategy improving use efficiency, environment effectiveness, sustaining development production systems rice.