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三峡库区典型消落区土壤氮磷的动态变化特征

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李楚娴, 张金洋, 王定勇, 余亚伟, 孙荣国, 张成, 李强. 三峡库区典型消落区土壤氮磷的动态变化特征[J]. 环境化学, 2014, 33(12): 2168-2175. doi: 10.7524/j.issn.0254-6108.2014.12.021
引用本文: 李楚娴, 张金洋, 王定勇, 余亚伟, 孙荣国, 张成, 李强. 三峡库区典型消落区土壤氮磷的动态变化特征[J]. 环境化学, 2014, 33(12): 2168-2175. doi: 10.7524/j.issn.0254-6108.2014.12.021
shu
LI Chuxian, ZHANG Jinyang, WANG Dingyong, YU Yawei, SUN Rongguo, ZHANG Cheng, LI Qiang. Dynamic variations of nitrogen and phosphorous of the soil in hydro-fluctuation of Three Gorges Reservoir[J]. Environmental Chemistry, 2014, 33(12): 2168-2175. doi: 10.7524/j.issn.0254-6108.2014.12.021
Citation: LI Chuxian, ZHANG Jinyang, WANG Dingyong, YU Yawei, SUN Rongguo, ZHANG Cheng, LI Qiang. Dynamic variations of nitrogen and phosphorous of the soil in hydro-fluctuation of Three Gorges Reservoir[J]. Environmental Chemistry, 2014, 33(12): 2168-2175. doi: 10.7524/j.issn.0254-6108.2014.12.021
shu

三峡库区典型消落区土壤氮磷的动态变化特征

  • 1.

    内江师范学院化学化工学院, 内江, 641112;

  • 2.

    西南大学资源环境学院, 土壤多尺度界面过程与调控重庆市重点实验室, 重庆, 400715;

  • 3.

    重庆市三峡库区农业面源污染控制工程技术研究中心, 重庆, 400716;

  • 4.

    重庆市农业资源与环境研究重点实验室, 重庆, 400716

  • 基金项目:

    国家自然科学基金项目(41173116) 资助.

Dynamic variations of nitrogen and phosphorous of the soil in hydro-fluctuation of Three Gorges Reservoir

  • 1.

    College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang, 641112, China;

  • 2.

    College of Resources and Environment, Southwest University, Chongqing Key Laboratory of Soil Multi-scale Interfacial Process, Chongqing, 400715, China;

  • 3.

    Chongqing Engineering Research Center for Agricultural Non-point Source Pollution Control in the Three Gorges Reservoir Area, Chongqing, 400716, China;

  • 4.

    Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400716, China

  • Fund Project:

  • 摘要: 在三峡库区干流段忠县石宝寨与支流段汝溪河涂井设置固定采样点,研究1年内不同月份、不同高程出露表层土壤氮、磷含量随水位变化特征.结果表明,干流石宝寨点(未淹区/消落区)土壤中全氮、全磷年均含量分别为(0.68/0.74)、(0.56/0.54) g·kg-1,而支流涂井点为(0.67/0.80)、(0.52/0.65) g·kg-1,其中,干支流采样点消落区全氮含量在7月累积量最明显,全磷含量在9月最高;相应干流采样点的速效氮、速效磷年均含量分别为(39.81/40.42)、(11.75/14.22) mg·kg-1,而支流采样点为(35.63/48.89)、(6.72/7.68)mg·kg-1,其中,干支流采样点消落区速效氮含量在9月累积量最明显,速效磷含量在7月最高,与相应全量特征不同.可见,消落区土壤氮磷全量高,其相应速效态含量未必高.较于未淹区,干流石宝寨与支流涂井消落区土壤氮磷含量在落干期间均表现出一定的积累,且涂井点的累积量明显高于石宝寨点,待水位上涨时,汝溪河的潜在富营养化风险更大.
    Abstract: Typical main stream (Shi Baozhai) and tributary (Tu Jing, Ru Xihe) were chosen as sample plots. The characteristics of nitrogen and phosphorous in soil with water level fluctuating in one year were investigated. The results showed that, average annual contents of the total nitrogen and total phosphorous in the control (not flooded soil) /hydro-fluctuation were 0.68/0.74 and 0.56/0.54 g·kg-1 in main-stream, 0.67/0.80 and 0.52/0.65 g·kg-1 in tributary, respectively. Moreover, the contents of total nitrogen on July were the highest, while total phosphorous on September. Meanwhile, average annual contents of the available nitrogen and available phosphorous in the control/Hydro-Fluctuation were 39.81/40.42 and 11.75/14.22 mg·kg-1 in main-stream, 35.63/48.89 and 6.72/7.68 mg·kg-1 in tributary, respectively. The contents of available nitrogen on September were the highest, while available phosphorous on July. Therefore, the total contents of soil nutrient in Hydro-Fluctuation were high, nor did the available contents. Compared with the control, the contents of nitrogen and phosphorous in Hydro-Fluctuation of Shi Baozhai and Ru Xihe had accumulated a lot during the non-flooded period. In addition, the accumulation of soil nutrient in Ru Xihe outweighed that in Shi Baozhai, which indicated that the risk of potential eutrophication in Ru Xihe was higher.
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  • 收稿日期:  2014-06-23
李楚娴, 张金洋, 王定勇, 余亚伟, 孙荣国, 张成, 李强. 三峡库区典型消落区土壤氮磷的动态变化特征[J]. 环境化学, 2014, 33(12): 2168-2175. doi: 10.7524/j.issn.0254-6108.2014.12.021
引用本文: 李楚娴, 张金洋, 王定勇, 余亚伟, 孙荣国, 张成, 李强. 三峡库区典型消落区土壤氮磷的动态变化特征[J]. 环境化学, 2014, 33(12): 2168-2175. doi: 10.7524/j.issn.0254-6108.2014.12.021
shu
LI Chuxian, ZHANG Jinyang, WANG Dingyong, YU Yawei, SUN Rongguo, ZHANG Cheng, LI Qiang. Dynamic variations of nitrogen and phosphorous of the soil in hydro-fluctuation of Three Gorges Reservoir[J]. Environmental Chemistry, 2014, 33(12): 2168-2175. doi: 10.7524/j.issn.0254-6108.2014.12.021
Citation: LI Chuxian, ZHANG Jinyang, WANG Dingyong, YU Yawei, SUN Rongguo, ZHANG Cheng, LI Qiang. Dynamic variations of nitrogen and phosphorous of the soil in hydro-fluctuation of Three Gorges Reservoir[J]. Environmental Chemistry, 2014, 33(12): 2168-2175. doi: 10.7524/j.issn.0254-6108.2014.12.021
shu

三峡库区典型消落区土壤氮磷的动态变化特征

  • 1.  内江师范学院化学化工学院, 内江, 641112;
  • 2.  西南大学资源环境学院, 土壤多尺度界面过程与调控重庆市重点实验室, 重庆, 400715;
  • 3.  重庆市三峡库区农业面源污染控制工程技术研究中心, 重庆, 400716;
  • 4.  重庆市农业资源与环境研究重点实验室, 重庆, 400716
  • 收稿日期:  2014-06-23
基金项目:

国家自然科学基金项目(41173116) 资助.

摘要: 在三峡库区干流段忠县石宝寨与支流段汝溪河涂井设置固定采样点,研究1年内不同月份、不同高程出露表层土壤氮、磷含量随水位变化特征.结果表明,干流石宝寨点(未淹区/消落区)土壤中全氮、全磷年均含量分别为(0.68/0.74)、(0.56/0.54) g·kg-1,而支流涂井点为(0.67/0.80)、(0.52/0.65) g·kg-1,其中,干支流采样点消落区全氮含量在7月累积量最明显,全磷含量在9月最高;相应干流采样点的速效氮、速效磷年均含量分别为(39.81/40.42)、(11.75/14.22) mg·kg-1,而支流采样点为(35.63/48.89)、(6.72/7.68)mg·kg-1,其中,干支流采样点消落区速效氮含量在9月累积量最明显,速效磷含量在7月最高,与相应全量特征不同.可见,消落区土壤氮磷全量高,其相应速效态含量未必高.较于未淹区,干流石宝寨与支流涂井消落区土壤氮磷含量在落干期间均表现出一定的积累,且涂井点的累积量明显高于石宝寨点,待水位上涨时,汝溪河的潜在富营养化风险更大.

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