四川农业大学学报
四川農業大學學報
사천농업대학학보
JOURNAL OF SICHUAN AGRICULTURAL UNIVERSITY
2014年
4期
418-425
,共8页
黄铄淇%胡慧蓉%韩钊龙%郭绪虎%杨浩
黃鑠淇%鬍慧蓉%韓釗龍%郭緒虎%楊浩
황삭기%호혜용%한쇠룡%곽서호%양호
大气氮沉降%降雨%铵态氮%硝态氮
大氣氮沉降%降雨%銨態氮%硝態氮
대기담침강%강우%안태담%초태담
atmospheric nitrogen deposition%rainfall%ammonium%nitrate
【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。
【目的】研究昆明東郊不同形態的氮濕沉降月均濃度變化、各形態氮的沉降量及其與降雨的關繫。【方法】以昆明東郊一站點為研究對象,藉助自製雨水收集器和 PortLog 便攜式自動氣象站進行降水採樣與降水量的鑑測。【結果】總氮月均濃度的範圍為(0.54~2.60 mg/L),其中銨態氮月均濃度的範圍為(0.16~1.15 mg/L),硝態氮月均濃度的範圍為(0.09~0.59 mg/L),可溶性有機氮月均濃度的範圍為(0.25~0.94 mg/L)。銨態氮、硝態氮、可溶性有機氮與總氮間存在顯著正相關關繫(P <0.01)。各形態氮濃度的季節規律為鼕春高、鞦夏低.年氮沉降總量為5.11 kg/hm2,其中銨態氮佔37.7%、硝態氮佔18.8%、可溶性有機氮佔43.4%。【結論】雨水中的各形態氮的濃度隨著連續降雨逐漸被稀釋,在降雨量較大的情況下,各形態氮月均濃度低。各形態氮沉降量均為夏季最高,鼕季最低。全年各形態氮45箇樣品的沉降量與其降雨量之間呈乘冪型相關。
【목적】연구곤명동교불동형태적담습침강월균농도변화、각형태담적침강량급기여강우적관계。【방법】이곤명동교일참점위연구대상,차조자제우수수집기화 PortLog 편휴식자동기상참진행강수채양여강수량적감측。【결과】총담월균농도적범위위(0.54~2.60 mg/L),기중안태담월균농도적범위위(0.16~1.15 mg/L),초태담월균농도적범위위(0.09~0.59 mg/L),가용성유궤담월균농도적범위위(0.25~0.94 mg/L)。안태담、초태담、가용성유궤담여총담간존재현저정상관관계(P <0.01)。각형태담농도적계절규률위동춘고、추하저.년담침강총량위5.11 kg/hm2,기중안태담점37.7%、초태담점18.8%、가용성유궤담점43.4%。【결론】우수중적각형태담적농도수착련속강우축점피희석,재강우량교대적정황하,각형태담월균농도저。각형태담침강량균위하계최고,동계최저。전년각형태담45개양품적침강량여기강우량지간정승멱형상관。
Objective]The objective of this study was to investigate monthly dynamics of atmos-pheric 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 moni-tored by PORTLOG automatic weather station.[Results]The monthly mean concentrations of total dissolved N (DTN),ammonium (NH +4 -N),nitrate (NO-3 -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 )be-tween DTN and NH +4 -N,NO-3 -N and DON.Total wet N deposition was 5.1 kg/(hm2 ·a),with NH +4 -N,NO-3 -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 a power equation.