本文選題：近紅外激光吸收光譜 + 氨揮發(fā)　； 參考：《紅外與毫米波學(xué)報》2017年04期

【摘要】：研究氨近紅外光譜特性并建立濃度反演算法模型,重點優(yōu)化相關(guān)性分析和溫度修正功能.利用開放式激光吸收光譜技術(shù)建立氨區(qū)域監(jiān)測系統(tǒng),于2015年在安徽渦陽秸稈還田示范區(qū)開展監(jiān)測實驗,研究玉米和小麥種植情況下的土壤氨揮發(fā)特征.研究結(jié)果表明,氨濃度具有日變化趨勢:白天濃度上升在正午達(dá)到最高值,逐步降低到夜間至最小值.夏、秋季典型小時濃度變化范圍為0.6×10~(-3)~1.34×10~(-3)mmol/mol和1.14×10~(-3)~1.82×10~(-3)mmol/mol,秋季玉米和夏季小麥秸稈還田的最大氨日均濃度為4.6×10~(-4)mmol/mol和1.7×10~(-3)mmol/mol,還田一個多月后氨濃度明顯上升,并存在一定季節(jié)性差異.近紅外光譜技術(shù)為明晰土壤氨排放規(guī)律提供了技術(shù)支持.
[Abstract]:The characteristics of ammonia near infrared spectroscopy (NIR) were studied and the concentration inversion algorithm model was established. The function of correlation analysis and temperature correction was optimized. Based on the open laser absorption spectrum technique, the ammonia monitoring system was established, and the monitoring experiment was carried out in Wuyang, Anhui Province in 2015, to study the characteristics of soil ammonia volatilization under maize and wheat cultivation. The results show that the concentration of ammonia has a diurnal variation trend: the concentration of ammonia increases to the highest value at noon and decreases gradually to the minimum value at night. In summer and autumn, the variation range of typical hourly concentration was 1. 34 脳 10~(-3)mmol/mol and 1. 14 脳 10 ~ (10) ~ (-3) mol 路mol ~ (-1), respectively. The maximum daily ammonia concentration of corn and wheat straw in autumn was 4.6 脳 10~(-4)mmol/mol and 1.7 脳 10 ~ (-3) mmol / mol respectively, and there was a seasonal difference in ammonia concentration after more than a month. Near-infrared spectroscopy (NIR) provides technical support for the clarification of soil ammonia emission law.
【作者單位】： 中國科學(xué)院環(huán)境光學(xué)與技術(shù)重點實驗室安徽光學(xué)精密機(jī)械研究所;中國科學(xué)技術(shù)大學(xué);安徽省環(huán)境光學(xué)監(jiān)測技術(shù)重點實驗室;
【基金】：Supported by the National Key Scientific Instrument and Equipment Development Projects(2012YQ22011902) the Special Foundation for Young Scientists of Hefei Institutes of Physical Science,Chinese Academy of Sciences(YZJJ201502)
【分類號】：O433;S141.4
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本文編號：1953761