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    段文靖, 段文标, 陈立新, 沈海龙, 牟宇, 韩冬荟. 不同质量浓度铵态氮浇灌下城市森林土壤淋滤液无机氮及土壤氮素变化——以哈尔滨市为例[J]. 北京林业大学学报, 2020, 42(1): 84-93. DOI: 10.12171/j.1000-1522.20180193
    引用本文: 段文靖, 段文标, 陈立新, 沈海龙, 牟宇, 韩冬荟. 不同质量浓度铵态氮浇灌下城市森林土壤淋滤液无机氮及土壤氮素变化——以哈尔滨市为例[J]. 北京林业大学学报, 2020, 42(1): 84-93. DOI: 10.12171/j.1000-1522.20180193
    Duan Wenjing, Duan Wenbiao, Chen Lixin, Shen Hailong, Mu Yu, Han Donghui. Changes of inorganic nitrogen in the leachates of urban forest soil and its soil nitrogen under the irrigation of different mass concentrations of ammonium nitrogen: taking Harbin City of northeastern China as an example[J]. Journal of Beijing Forestry University, 2020, 42(1): 84-93. DOI: 10.12171/j.1000-1522.20180193
    Citation: Duan Wenjing, Duan Wenbiao, Chen Lixin, Shen Hailong, Mu Yu, Han Donghui. Changes of inorganic nitrogen in the leachates of urban forest soil and its soil nitrogen under the irrigation of different mass concentrations of ammonium nitrogen: taking Harbin City of northeastern China as an example[J]. Journal of Beijing Forestry University, 2020, 42(1): 84-93. DOI: 10.12171/j.1000-1522.20180193

    不同质量浓度铵态氮浇灌下城市森林土壤淋滤液无机氮及土壤氮素变化——以哈尔滨市为例

    Changes of inorganic nitrogen in the leachates of urban forest soil and its soil nitrogen under the irrigation of different mass concentrations of ammonium nitrogen: taking Harbin City of northeastern China as an example

    • 摘要:
      目的探明不同质量浓度铵态氮浇灌下城市森林土壤淋滤液铵态氮与硝态氮及土壤氮素的变化。
      方法本文选择哈尔滨市城市林业示范基地内代表性的3种人工林(蒙古栎、黄檗、水曲柳)的土壤作为研究对象,以其邻近的裸地土壤作为对照,通过野外采集土柱和室内土柱模拟法,使用硫酸铵配制不同质量浓度铵态氮溶液(100、50、25、0 mg/L)进行室内模拟浇灌,对土柱淋滤液中铵态氮和硝态氮及处理后的土柱土壤氮素进行测定与分析。
      结果3个林型和对照原状土柱对铵态氮去除效果显著,去除率均达到95%以上;不同质量浓度铵态氮负荷下各林型土壤对其去除效果差异不显著;3个林型及对照原状土柱淋滤液硝态氮质量浓度较高,均为4.41 ~ 5.53 mg/L;进水铵态氮质量浓度为100 mg/L时,除对照外,3个林型土柱中铵态氮含量均增加;低于100 mg/L时,除蒙古栎人工林外,其他两个林型土柱土壤中铵态氮含量降低;各林型和对照的土柱土壤硝态氮含量显著增加,而全氮含量差异不显著;利用不同质量浓度铵态氮浇灌后,土柱淋滤液中铵态氮的变化受林型和进水铵态氮质量浓度及其两者的交互影响不显著,但对硝态氮的影响达到显著水平,以上3者对浇灌后土柱土壤中氮素的影响均达到显著水平。
      结论在3个林型及裸地原状土柱中,蒙古栎人工林土壤对铵态氮的去除效果及硝态氮淋失最显著,其次为黄檗人工林土壤、水曲柳人工林土壤和裸地土壤。

       

      Abstract:
      ObjectiveThis paper aims to ascertain the changes of soil nitrogen and ammonium nitrogen, nitrate nitrogen in the urban forest soil leachate irrigated with different mass concentrations of ammonium nitrogen.
      MethodThis paper selects 3 typical forest types in the demonstration base of urban forest in Harbin City of northeastern China (Quercus mongolia plantation, Fraxinus mandshurica plantation, Phellodendron amurense plantation) as the object of this study. Bare ground without vegetative growth was used as control. Through the method of field collecting soil column and indoor soil column simulation, different mass concentrations of ammonium nitrogen solutions (100, 50, 25, 0 mg/L) were prepared by ammonium sulfate for indoor simulation irrigation, ammonium nitrogen and nitrate nitrogen in soil column leachate and soil nitrogen in column after treatment being measured and analyzed.
      ResultThe effects of three forest types on the removal of ammonium nitrogen were significant, the removal rate was above 95%; there was no significant difference in the removal of ammonium nitrogen by different forest types under the load of different mass concentration of ammonium nitrogen; the mass concentrations of nitrate nitrogen in original soil column leachate for three forest types and a control was higher, it ranged from 4.41 to 5.53 mg/L; when the influent ammonium nitrogen mass concentration was 100 mg/L, except for control, the content of ammonium nitrogen in soil columns for the three forest types was increased; when it was lower than 100 mg/L, except for the Quercus mongolia plantation, the content of ammonium nitrogen in the soil columns for the other two forest types was reduced; the content of nitrate nitrogen in soil column for each forest type and the control was significantly increased, but the difference in total nitrogen content between them was not significant. After irrigation with different mass concentrations of ammonium nitrogen, the change of ammonium nitrogen in soil column leachate was not significantly affected by the forest type, influent water amount and their interaction. But their effects on nitrate nitrogen reached a significant level. The change of nitrogen in the soil column after irrigation was significantly influenced by the above three factors.
      ConclusionFor the original soil column in three forest types and bare soil, ammonium nitrogen removal and nitrate nitrogen leaching loss in the soil in Quercus mongolia plantation were most significant, followed by the soil in Phellodendron amurense plantation, Fraxinus mandshurica plantation soil and bare soil.

       

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