四川农业大学学报 ›› 2014, Vol. 32 ›› Issue (04): 418-425.doi: 10.3969/j.issn.1000-2650.2014.04.011

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昆明东郊大气氮湿沉降的测定与分析

黄铄淇1, 胡慧蓉1, 韩钊龙1, 郭绪虎2, 杨浩1   

  1. 1. 西南林业大学环境科学与工程学院, 昆明 650224;
    2. 重庆大学生物工程学院, 重庆 400044
  • 收稿日期:2014-10-20 出版日期:2014-12-31 发布日期:2017-02-28
  • 通讯作者: 胡慧蓉,教授,研究方向:森林土壤生态,E-mail:hhrxl@163.com。 E-mail:hhrxl@163.com
  • 作者简介:黄铄淇,硕士生。
  • 基金资助:
    西南林业大学水土保持与荒漠化防治重点学科(XKX200905)

Atmospheric Wet Nitrogen Deposition in the Eastern Suburb of Kunming

HUANG Shuo-qi1, HU Hui-rong1, HAN Zhao-long1, GUO Xu-hu2, Yang Hao1   

  1. 1. Environmental Science and Engineering College, Southwest Forestry University, Kunming 650224, China;
    2. College of Bioengineering, Chongqing University, Chongqing 400030, China
  • Received:2014-10-20 Online:2014-12-31 Published:2017-02-28

摘要: [目的] 研究昆明东郊不同形态的氮湿沉降月均浓度变化、各形态氮的沉降量及其与降雨的关系。[方法] 以昆明东郊一站点为研究对象,借助自制雨水收集器和PortLog便携式自动气象站进行降水采样与降水量的监测。[结果] 总氮月均浓度的范围为(0.54~2.60 mg/L),其中铵态氮月均浓度的范围为(0.16~1.15 mg/L),硝态氮月均浓度的范围为(0.09~0.59 mg/L),可溶性有机氮月均浓度的范围为(0.25~0.94 mg/L)。铵态氮、硝态氮、可溶性有机氮与总氮间存在显著正相关关系(P<0.01)。各形态氮浓度的季节规律为冬春高、秋夏低.年氮沉降总量为5.11 kg/hm2,其中铵态氮占37.7%、硝态氮占18.8%、可溶性有机氮占43.4%。[结论] 雨水中的各形态氮的浓度随着连续降雨逐渐被稀释,在降雨量较大的情况下,各形态氮月均浓度低。各形态氮沉降量均为夏季最高,冬季最低。全年各形态氮45个样品的沉降量与其降雨量之间呈乘幂型相关。

关键词: 大气氮沉降, 降雨, 铵态氮, 硝态氮

Abstract: [Objective] The objective of this study was to investigate monthly dynamics of atmospheric wet deposition of different forms nitrogen (N)at a suburb site of Kunming,and to quantify the relationships between wet N deposition and precipitation. [Method] In the experimental site,precipitation was sampled by a custom-designed rain collector and daily precipitation was monitored by PORTLOG automatic weather station. [Results] The monthly mean concentrations of total dissolved N (DTN),ammonium (NH4+-N),nitrate (NO3--N),and dissolved organic N (DON)ranged from 0.54 to 2.60 mg/L,from 0.16 to 1.15 mg/L,from 0.09 to 0.59 mg/L and from 0.25 to 0.94 mg/L,respectively.There was significant linear correlation (P<0.01) between DTN and NH4+-N,NO3--N and DON.Total wet N deposition was 5.1 kg/(hm2·a),with NH4+-N,NO3--N and DON accounting for 38%,19% and 43%,respectively. [Conclusion] The results suggested that precipitation had a strong dilution effect on N concentrations,with higher concentrations in winter and spring and lower concentrations in autumn and summer.N deposition rate was highest in summer but lowest in winter.The positive relationship between all forms of N and precipitation was fitted well by apower equation.

Key words: atmospheric nitrogen deposition, rainfall, ammonium, nitrate

中图分类号: 

  • X51