%0 Journal Article
%T Effects of four fumigants on soil nitrogen transformation<br>4种熏蒸剂对土壤氮素转化的影响
%A YAN Dong-Dong
%A WANG Qiu-Xia
%A GUO Mei-Xia
%A GUO Zhang-Bi
%A CAO Ao-Cheng
%A <br>颜冬冬
%A 王秋霞
%A 郭美霞
%A 郭章碧
%A 曹坳程
%J 中国生态农业学报
%D 2010
%I 
%X With laboratory incubation method at constant temperature under aerated conditions, the effects of 4 fumigants Chloropicrin (Pic), methyl iodide (MeI), 1,3-dichloropropene (1,3-D) and methyl disulfide (DMDS) on soil N mineralization and nitrification under vegetable greenhouse conditions in Beijing area were studied. The results reveal that mineral N concentration increases significantly in a short-term period after fumigant treatment. Cumulative N mineralization under 1,3-D, MeI, DMDS and Pic treatments are 320.62 mg·kg-1, 317.25 mg·kg-1, 287.87 mg·kg-1 and 278.73 mg·kg-1 respectively. This represents corresponding increases of 68.85%, 67.07%, 51.60% and 46.78% compared with untreated soils (189.89 mg·kg-1). Fumigation strongly inhibits nitrification. Compared with the control, ammonium nitrogen content increases after fumigation. MeI treatment has the highest ammonium nitrogen (194.97 mg·kg-1) and control treatment has the lowest (28.82 mg·kg-1). Nitrification inhibition rates by Pic, 1,3-D, DMDS, MeI treatments are 40.8%, 20.8%, 26.9% and 24.1% respectively. Nitrification is inhibited for at least 2 weeks after treatment with Pic, 1,3-D and MeI, and at least for 1 week after treatment with DMDS. Nitrification and mineralization gradually recover under long-term incubation.
%K Fumigant
%K Chloropicrin
%K Methyl iodide
%K 1
%K 3-Dichloropropene
%K Methyl disulfide
%K Nitrogen transformation
%K Nitrification
%K Mineralization<br>熏蒸剂
%K 氯化苦
%K 碘甲烷
%K 1
%K 3-二氯丙烯
%K 二甲基二硫
%K 氮素转化
%K 硝化作用
%K 矿化作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=5F9974641B35D0E18F513D0458126964&yid=140ECF96957D60B2&vid=13553B2D12F347E8&iid=94C357A881DFC066&sid=40541F483644ACC4&eid=502AE9EE93CAADD7&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=23