Impact of dicyandiamide on emissions of nitrous oxide, nitric oxide and ammonia from agricultural field in the North China Plain

The effect of drip irrigation and drip fertigation on N2O and NO emissions, water saving and grain yields in a maize field in the North China Plain

“…Similar to the N 2 O emissions, the NO emissions from the three fertilization treatments immediately increased and lasted for about ten days after each fertilization event. However, the NO emission peaks after the basal fertilization were postponed for 1-2 days compared with the corresponding N 2 O emission peaks, which was in agreement with our previous studies (Zhang et al, 2016;Zhou et al, 2016). NO emission from soil was the net effect of its production and diffusion rates (Russow et al, 2008;Oswald et al, 2013), and thus the earlier emission peaks of N 2 O than those of NO were rationally ascribed to a strong restriction of NO diffusion in the soil under extremely high moisture conditions that were present immediately after irrigation.…”

“…2. Compared with the two control treatments, notable N 2 O emissions from the three fertilization treatments primarily occurred within approximately 10 days after each fertilization event and were in good agreement with the results of our previous studies in the same field (Zhang et al, 2011(Zhang et al, , 2012(Zhang et al, , 2014Zhou et al, 2016). An evident difference in N 2 O emissions was present among the three fertilization treatments.…”

“…The study was carried out in an agricultural field in Wangdu County (38°1′N, 115°5′E), Hebei Province, China. Detailed information about the experimental field is in our previous publications (Zhang et al, 2012;Zhou et al, 2016).…”

“…Because soil moisture is a key factor that affects the production and diffusion of N 2 O and NO in the soil, varying the amount of irrigation water and using different irrigation methods can affect emissions of N 2 O and NO from soil (Sánchez-Martín et al, 2008). Many studies on N 2 O and NO emissions from agricultural fields under furrow irrigation or flood irrigation have been done (e.g., Rochester, 2003;Grace et al, 2010;Qin et al, 2012;Yan et al, 2013;Zhang et al, 2016;Zhou et al, 2016), but only a few investigations have been conducted for N 2 O and NO emissions under drip irrigation (Sanchez-Martin et al, 2008;Scheer et al, 2008;Kennedy et al, 2013;Li et al, 2014;Maris et al, 2015). To our best knowledge, only one study investigated N 2 O emissions in a wheat field under drip irrigation in the NCP (Wang et al, 2016), and an evident reduction (14.6%) of N 2 O in the drip irrigation treatment compared to flood irrigation was found.…”

Spatiotemporal Evolution of Atmospheric Ammonia Columns over the Indo-Gangetic Plain by Exploiting Satellite Observations

“…In the atmosphere, ammonia combines with other gases and causes the formation of fine particulates which are hazardous to human health [6]. Reactions with other pollutants like oxides of sulphur lead to the formation of fine particulates [7]. Reactions with primary pollutants, like oxides of nitrogen and sulphur as well as HCl, cause the formation of ammonium ions (NH 4 + ).…”