Influence of 2-chloro-6 (trichloromethyl) pyridine and dicyandiamide on nitrous oxide emission under different soil conditions

Figures & data

Figure 1  Nitrous oxide emission from an Andosol and a Gray Lowland soil amended with nitrification inhibitors under water-saturated conditions. (Bars represent the standard deviation.)

Table 1 Emitted N2O and N2O-N/applied nitrogen from soil amended with ammonium sulfate and nitrapyrin

AS (mg g^−1)	NP^†	Emitted N2O^‡	N2O-N/applied N × 100^§
0	–	1.6 ± 0.1
0.01	–	2.9 ± 0.1	0.013
0.1	–	64.6 ± 2.2	0.06
0.5	–	934 ± 28	0.19
0.01	+	2.1 ± 0.1	0.005
0.1	+	11.3 ± 0.2	0.01
0.5	+	268 ± 16	0.05
^†+, applied; –, not applied.
^‡N2O-N pg (g dry soil)^−1 (mean ± standard deviation).
^§Emitted N2O-N (Treatment − Control)/applied N × 100. AS, ammonium sulfate; NP, nitrapyrin.

Figure 2  Changes in ammonium, nitrate plus nitrite and total inorganic nitrogen concentrations in an Andosol and a Gray Lowland soil amended with nitrification inhibitors under water-saturated conditions. (Each symbol is the average of two samples.)

Figure 3  Influence of nitrapyrin on nitrous oxide emission in an Andosol amended with different levels of ammonium sulfate. (Bars represent the standard deviation.)