Nitrous oxide emissions from a maize field during two consecutive growing seasons in the North China Plain

• Published in: Journal of environmental sciences (China) 2012, Vol.24 (1), p.160-168
• Main Authors: Zhang, Yuanyuan, Liu, Junfeng, Mu, Yujing, Xu, Zhu, Pei, Shuwei, Lun, Xiaoxiu, Zhang, Ying
• Format: Article
• Language: English
• Subjects: Agrochemicals; China; compound fertilizers; corn; denitrification; emissions; emissions factor; Environmental Monitoring - methods; fertilizer application; fertilizers; growing season; irrigation; maize field; manure; nitrogen fertilizers; nitrous oxide; Nitrous Oxide - analysis; North China Plain; poultry manure; Soil - analysis; Soil - chemistry; soil temperature; Triticum aestivum; wheat straw; Zea mays; 一氧化二氮; 化学氮肥; 华北平原; 土壤温度; 排放量; 玉米田; 生长季节; 鸡粪处理
• ISSN: 1001-0742; 1878-7320
• DOI: 10.1016/s1001-0742(10)60594-3

Nitrous oxide （N 2 O） emissions from a maize field in the North China Plain （Wangdu County,Hebei Province,China） were investigated using static chambers during two consecutive maize growing seasons in the 2008 and 2009.The N 2 O pulse emissions occurred with duration of about 10 days after basal and additional fertilizer applications in the both years.The average N 2 O fluxes from the CK （control plot,without crop,fertilization and irrigation）,NP （chemical N fertilizer）,SN （wheat straw returning plus chemical N fertilizer）,OM- 1/2N （chicken manure plus half chemical N fertilizer） and OMN （chicken manure plus chemical N fertilizer） plots in 2008 were 8.51,72.1,76.6,101,107 ng N/（m 2 ·sec）,respectively,and in 2009 were 33.7,30.0 and 35.0 ng N/（m 2 ·sec） from CK,NP and SN plots,respectively.The emission factors of the applied fertilizer as N 2 O-N （EFs） were 3.8% （2008） and 1.1% （2009） for the NP plot,3.2% （2008） and 1.2% （2009） for the SN plot,and 2.8% and 2.2% in 2008 for the OM-1/2N and OMN plots,respectively.Hydromorphic properties of the investigated soil （with gley） are in favor of denitrification.The large differences of the soil temperature and water-filled pore space （WFPS） between the two maize seasons were suspected to be responsible for the significant yearly variations.Compared with the treatments of NP and SN,chicken manure coupled with compound fertilizer application significantly reduced fertilizer loss rate as N 2 O-N.