Abstract
Outdoor pot and field experiments were conducted to study the effect of controlled-release fertilizer (CRF) on nitrous oxide (N2O) and nitric oxide (NO) emissions and wheat yields during the 2011–2013. Three treatments, namely conventional N fertilizer (CF; urea and compound fertilizer, 300 kg N ha−1), CRF (210 kg N ha−1, which is 70% of the N applied in the CF treatment), and check (CK, 0 N), were applied in three replicates. The soil temperature, soil moisture, N uptake by wheat, wheat yield, and variations in NO3–N, NH4–N, N2O, and NO emissions were measured. Results showed that the average total N2O and NO emissions in the CRF treatment in the pot and field experiments decreased by 26.5 and 19.4%, respectively. The average N2O and NO emission factors decreased by 32.1 and 24.8%, respectively, compared with the CF treatment. However, the CRF wheat yields were insignificantly lower than those from the CF treatment. Results indicated that CRF could improve the efficiency of fertilizer N use, reduce labor cost, and increase economic benefit without sacrificing the yield.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call