N₂O Emissions from an Apple Orchard in the Coastal Area of Bohai Bay, China

Table 5

Soil properties, annual N fertilizations, and N₂O emissions from orchard soils.

Land use	TN; (g kg^−1)	SOC; (g kg^−1)	C/N; ratio	NH4^+–N; (mg kg^−1)	NO3^−–N; (mg kg^−1)	N fertilizer; (kg N ha^−1)	N2O emissions; (kg N ha^−1)	References
Apple	1.42	10.0	6.9	82.8	60.5	800	44.3	This study
Apple	1.36	10.0	7.4	33.5	36.9	0^a	34.6	This study
Apple	1.00	6.3				312	3.2	[15]
Orange	1.10			7.4	27.1	597	2.03	[14]
Orange	1.06			8.5	65.2	579	1.55	[14]
Peach	1.38	6.3				210	1.4	[13]
Longan	1.49	13.4	10.0			0^a	8.64	[20]

aNitrogen fertilizers were applied before the experimental years (Liu et al. [20] and this study).