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灌水频率对地下水埋深较浅土壤中溴和硝态氮迁移的影响

Keywords: 灌水频率,地下水埋深,灌施,,硝态氮,迁移

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Abstract:

采用人工土柱试验方法,研究了3种灌水频率下灌施到地下水埋深较浅土壤中的溴(Br-)和硝态氮(NO3--N)的迁移规律。结果表明,Br-和NO3-的迁移规律表现出良好的一致性,在相同灌水量下,随灌水频率的降低(除土表5cm土层),Br-、NO3-浓度峰均变胖、变缓,峰值降低,且Br-和NO3-峰向下迁移加快;灌水频率越高,土表Br-、NO3-含量降低越快,淋洗越彻底。随灌水总量的增加,各灌水频率土壤中Br-、NO3-浓度峰变胖、变缓,峰值降低。

References

[1]  徐谦.我国化肥和农药非点源污染状况综述[J].农村生态环境,1996,12(2):39-43,.
[2]  邵孝侯 Ho,VJG.0.01molL^—1CaCl2作为土壤不同N素形态浸提剂的研究[J].土壤学报,1991,28(1):32-39,.
[3]  文化 钱友山 程序 等.华北平原农业对地下水NI3^-污染的初探[J].农业环境保护,1990,9(1):1-5.
[4]  Ferguson R B, Eisenhauer D E, Bockstadter T L, et al. Water and nitrogen management in central Platte valley of Nebraska[J]. Journed of Irrigation and Drainage Engineering, 1990, 116:557 - 565.
[5]  Thomas J Bicki, Lei Guo. Tillage and simulated rainfall intensity effect on bromide movement in an argiudoll[J]. Soil Sci Soc Amer J, 1991,55:794 - 799.
[6]  Bauder J W, Montgomery B R. N - source and irrigation effects on nitrate leaching[J]. Agronomy J, 1980, 72:593 -596.
[7]  Pang X P, Letey J, Wu L. Irrigation quantity and uniformity and nitrogen application effects on crop yield and nitrogen leaching[J]. Soil Sci Soc Am J, 1997,61: 257-261.
[8]  Bowman R S. Evaluation of some new tracers for soil water studies[J].Soil Sci Soc Am J, 1984,48: 987-993.
[9]  Ashraf M S, Izadi B, King B. Transport of bromide under intermittent and continuous ponding conditions[J]. J Environ Qual, 1997, 26:69 - 75.

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