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覆膜栽培及抑制剂施用对稻田N2O排放的影响 预览 被引量:8

Effects of Cultivation Pattern and Inhibitor Application on Nitrous Oxide Emission from Paddy Fields
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摘要 采用静态箱-气相色谱法研究脲酶抑制剂氢醌(Hydroquinone,HQ)与硝化抑制剂双氰胺(Dicyandiamide,DCD)配合施用(HQ/DCD)对常规栽培和水稻覆膜节水高产栽培下四川丘陵地区稻田的N2O排放的影响.结果表明,水稻生长期,常规栽培和水稻覆膜节水高产栽培稻田N2O排放总量分别为41.8 mg/m2和506.9 mg/m2.HQ/DCD施用减少常规栽培与水稻覆膜节水高产栽培稻田N2O季节总排放,降幅分别为25.2%和48.5%.常规栽培和水稻覆膜节水高产栽培N2O季节总排放占施氮量的0.3%和3.4%,施入HQ与DCD后,其N2O季节总排放分别降为施氮量的0.2%和1.7%,HQ/DCD施用对水稻覆膜节水高产栽培下的N2O减排更为有效.各处理N2O排放与5 cm土壤温度、土壤Eh无显著相关性. A field experiment was conducted to assess the mitigation of N2O emission using urease inhibitor (Hydroquinone,HQ) and nitrification inhibitor (Dicyandiamide,DCD) under traditional flooding cultivation (TF) and no flooding with plastic mulching cultivation (PM).In the rice growing season,cumulative emission of N2O of treatment TF and PM was 41.8 mg/m2 and 506.9 mg/m2,respectively.The use of HQ/DCD decreased the total N2O emission 25.2% under traditional flooding cultivation and 48.5% under no flooding with plastic mulching cultivation.Under traditional flooding cultivation,total emission of N2O reduced from 0.3% of applied N with urea to 0.2% of applied N with HQ/DCD treatment,and under no flooding with plastic mulching cultivation,the use of HQ/DCD decreased the total emission of N2O from 3.4% to 1.7% of the applied N.Applying the HQ/DCD mitigated the N2O emission more effectively under the no flooding with plastic mulching cultivation compared with the traditional flooding cultivation.No significant correlation was observed between N2O flux,soil Eh or soil temperature in all the treatment.
作者 张怡 吕世华 马静 徐华 袁江 董瑜皎 ZHANG Yi, LV Shi-hua, MA Jing, XU Hua, YUAN Jiang, DONG Yu-jiao (1 State Key Laboratory of Soil and Sustainable Agriculture (Institute of Soil Science, Chinese Academy of Sciences), Nanjing 210008, China; 2 Institute of Soil Fertilizer, Sichuan Agriculture Sciences Academy, Chengdu 610066, China; 3 University of Chinese Academy of Sciences, Beijing 100049, China)
出处 《土壤》 CAS CSCD 北大核心 2013年第5期830-837,共8页 Soils
基金 中国科学院战略性先导科技专项(XDA05020200)、科技部国际科技合作项目(S2012GR0080)、公益性行业(农业)科研专项(201103039)和中国香港特别行政区嘉道理农场暨植物园项目资助.
关键词 地膜覆盖 N2O排放 稻田 脲酶抑制剂 硝化抑制剂 Plastic mulching N2O emission Paddy field Urease inhibitor Nitrification inhibitor
作者简介 张怡(1988-),女,江苏南京人,硕士研究生,主要从事农田温室气体排放及其减缓对策研究.E-mail:yzhang@issas.ac.cn 通讯作者(hxu@issas.ac.cn)
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