[Effects of elevated atmospheric CO2 on paddy soil nitrogen content during rice season].
Taking the China rice/wheat FACE (Free-Air Carbon Dioxide Enrichment) as a platform, this paper studied the effects of elevated CO2 on the NH4(+)-N and NO3(-)-N contents at different depths of paddy soil in rice season. Under elevated CO2, the NH4(+)-N content in plough layer increased at early growth stage but decreased at late growth stage, and the soil NO3(-)-N content at the depths 5, 15, 30, 60, and 90 cm increased by 46.5%, 36.8%, 23.3%, 103.7%, and 42.7%, respectively, with a significant increase occurred at the depths 60 cm (P < 0.01) and 90 cm (P < 0.05), compared with the control.
College of Environment Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China. xzwang@yzu.edu.cn
Xiao-Zhi
XZ
Wang
Hai-Jin
HJ
Zhang
Wei
W
Sun
Ke
K
Feng
Jian-Guo
JG
Zhu
D000383:Agriculture / Q000379:methods; D001272:Atmosphere / Q000032:analysis; D002245:Carbon Dioxide / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis*; D012275:Oryza / Q000254:growth & development*; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012621:Seasons; D012987:Soil / Q000032:analysis*; D014908:Triticum / Q000254:growth & development*
D000644:Quaternary Ammonium Compounds; D012987:Soil; D002245:Carbon Dioxide; D009584:Nitrogen