%0 Journal Article
%T Nitrous oxide emission and reduction in a laboratory-incubated paddy soil response to pretreatment of water regime
%A Wang Lian-feng
%A Cai Zu-cong
%A Yan Hong
%A <br>Wang LF
%A Cai ZC
%A Yan H
%J 环境科学学报(英文版)
%D 2004
%I 
%X A laboratory incubation experiment was conducted to investigate nitrous oxide (N2O) emission and reduction in a paddy soil (Stagnic Anthrosol) response to the pretreatment of water regime. The paddy soil was maintained under either air-dried (sample D) or submerged (sample F) conditions for 110 d before the soil was adjusted into soil moisture of 20% , 40% , 60% , 80% and 100% water holding capacity (WH(-2)) respectively, and then incubated with or without 10% (v/v) acetylene for 138 h at 25 degrees C. At lower soil water content (< or = 60% WHC), N2O emission from the sample F was 2.29 times higher than that from the sample D (P < 0.01). While, N2O emission from the sample F was only 29 and 14 percent of that from the sample D at the soil moisture of 80% and 100% WHC, respectively (P < 0.01). The maximal N2O emissions observed at soil moisture of 80% WHC were about 24 and 186 times higher than the minima obtained at the soil moisture of 20% WHC for the sample F and D, respectively. But at the soil moisture of 80% and 100% WHC, N2O emission from the sample F with acetylene (F + ACE) was comparable to that of the sample D with acetylene (D + ACE). The results showed that the F sample produced N2O ability in denitrification was similar to the sample D, however, the sample F was in the better reduction of N2O to N, than the sample D even after the soil moisture was adjusted into the same level of 80% or 100% WHC. Therefore, the pretreatment of water regime influenced the strength and product composition of denitrification and N2O emission from the paddy soil.
%K denitrification
%K nitrous oxide reduction
%K acetylene
%K product composition
%K paddy soil<br>氮氧化合物
%K 水稻土
%K 预处理
%K 电石气
%K N2O
%K 温室气体
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=078EFCB4CA2331686EC05E56C0BB2BD0&yid=D0E58B75BFD8E51C&vid=7801E6FC5AE9020C&iid=38B194292C032A66&sid=A5111BA190517959&eid=FA88DCCE84EA0A56&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=6&reference_num=15