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当前位置: 首页 > 文章 > 4种熏蒸剂对土壤氮素转化的影响 中国生态农业学报 2010,18 (5) 934-938
Position: Home > Articles > Effects of four fumigants on soil nitrogen transformation Chinese Journal of Eco-Agriculture 2010,18 (5) 934-938

4种熏蒸剂对土壤氮素转化的影响

作  者：
颜冬冬;王秋霞;郭美霞;郭章碧;曹坳程
单  位：
中国农业科学院植物保护研究所
关键词：
熏蒸剂;氯化苦;碘甲烷;1,3-二氯丙烯;二甲基二硫;氮素转化;硝化作用;矿化作用
摘  要：
采用室内恒温通气培养法,以北京大棚蔬菜地土壤为对象,研究熏蒸剂氯化苦(Pic)、碘甲烷(MeI)、1,3-二氯丙烯(1,3-D)和二甲基二硫(DMDS)对土壤氮素矿化和硝化的影响。结果表明,4种熏蒸剂处理后短期内均能显著增加土壤中氮累积矿化量,在处理后第0d,1,3-D、MeI、DMDS、Pic处理的氮累积矿化量分别为320.62mg·kg-1、317.25mg·kg-1、287.87mg·kg-1、278.73mg·kg-1,较对照(189.89mg·kg-1)分别增加68.85%、67.07%、51.60%、46.78%。4种熏蒸剂处理后土壤硝化作用过程受到显著抑制,在药剂熏蒸处理第0d,各熏蒸处理土壤中铵态氮含量均高于对照组,其中MeI处理组铵态氮含量最高,为194.97mg·kg-1,对照组铵态氮含量最低,为28.82mg·kg-1。Pic、1,3-D、DMDS、MeI处理后第0d硝化抑制率分别为40.8%、20.8%、26.9%、24.1%。Pic、1,3-D、MeI对硝化作用的抑制至少维持两周,DMDS的抑制作用至少维持1周。在后期培养过程中,各处理矿化作用和硝化作用都逐渐恢复至对照水平。
译  名：
Effects of four fumigants on soil nitrogen transformation
作  者：
YAN Dong-Dong1,2,WANG Qiu-Xia1,2,GUO Mei-Xia1,2,GUO Zhang-Bi1,2,3,CAO Ao-Cheng1,2 (1.Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China;2.Key Laboratory of Pesticide Chemistry and Application Technology,Ministry of Agriculture,Beijing 100193,China;3.College of Bio-safety Science and Technology,Hunan Agricultural University,Changsha 410128,China)
关键词：
Fumigant,Chloropicrin,Methyl iodide,1,3-Dichloropropene,Methyl disulfide,Nitrogen transformation,Nitrification,Mineralization
摘  要：
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.

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