Lin Shan, Feng Ming-Lei, Ruan Lei-Lei, Hu Rong-Gui, Peng Ye-Xuan, Xiao Hong-Yu, Lu Lan
College of Resources and Environmental Science, Huazhong Agricultural University, Wuhan 430070, China.
Ying Yong Sheng Tai Xue Bao. 2008 Jun;19(6):1269-76.
By using static chamber techniques, the N2O emission from soils under different land use patterns was measured. The results showed that the N2O flux ranged from -21 to 435 microg x m(-2) h(-1), and the annual N2O flux was decreased in the order of vegetable field > orchard > upland > upland transferred from paddy field > woodland, being 447.14, 313.57, 167.00, 124.875 and 7.24 mg x m(-2), respectively. The N2O flux presented significant seasonal fluctuation, with the maximum in spring and summer, followed by in autumn, and the minimum in winter, which was approximately consistent with the changes of air- and soil temperature. N2O flux had significant positive correlation with the soil temperature at 5 cm depth and soil NO3(-)-N content, but no significant correlation with soil moisture and NH4(+)-N contents.
采用静态箱法测定了不同土地利用方式下土壤N2O的排放。结果表明，N2O通量范围为-21至435μg x m(-2) h(-1)，年N2O通量大小顺序为菜地＞果园＞旱地＞旱改水田＞林地，分别为447.14、313.57、167.00、124.875和7.24mg x m(-2)。N2O通量呈现明显的季节波动，春季和夏季最高，其次是秋季，冬季最低，这与气温和土壤温度的变化大致一致。N2O通量与5cm深度土壤温度和土壤NO3(-)-N含量呈显著正相关，与土壤湿度和NH4(+)-N含量无显著相关性。
