本文選題：土壤呼吸作用 + 紅外光譜　； 參考：《安徽大學(xué)》2015年碩士論文

【摘要】：土壤呼吸作用作為全球陸地生態(tài)系統(tǒng)中最大的碳庫和碳循環(huán)過程的重要組成部分,往往可以作為土壤質(zhì)量和土壤肥力的重要生物學(xué)指標(biāo)和土壤健康狀況的指示因子。因此,對土壤呼吸作用的研究和實(shí)時(shí)監(jiān)測不僅是準(zhǔn)確評估全球碳收支平衡的關(guān)鍵,而且對于當(dāng)前碳循環(huán)的研究以及減緩全球溫室效應(yīng)的進(jìn)程具有重要意義。現(xiàn)有的土壤呼吸作用監(jiān)測裝置,如美國LI-COR公司的Li-8100和Li-6400,這些土壤呼吸作用監(jiān)測設(shè)備價(jià)格昂貴,便攜性較差,在很大程度上限制了它的普及和發(fā)展,基于以上不足,本論文主要研究目標(biāo)是設(shè)計(jì)一款重復(fù)性和穩(wěn)定性較好、價(jià)格低廉、使用方便快捷的便攜式土壤呼吸作用監(jiān)測系統(tǒng)。首先,本文研究了紅外光譜傳感方法,其中峰高測量方法為氣體傳感器定量化提供了理論依據(jù),長光程理論為氣體傳感器氣室的創(chuàng)新設(shè)計(jì)提供了理論基礎(chǔ)。通過土壤呼吸作用實(shí)驗(yàn),證明了土壤呼吸作用釋放氣體的主要成分是二氧化碳?xì)怏w。通過氣體紅外光譜與NIST譜庫作對比分析,選取了定量分析二氧化碳?xì)怏w的特征波長為4.26μm。其次,通過前期的理論和技術(shù)指導(dǎo),設(shè)計(jì)了土壤呼吸作用監(jiān)測系統(tǒng)的核心部件—一款基于長光程N(yùn)DIR技術(shù)的土壤呼吸作用氣體傳感器。該傳感器采用單光路雙波長差分測量方法,在很大程度上減小了紅外光源的不穩(wěn)定性和光路干擾。傳感器氣室采用多次反射提高光程并結(jié)合氣室鍍膜技術(shù),提高了監(jiān)測系統(tǒng)的檢測能力和靈敏度。在硬件設(shè)計(jì)方面,傳感器結(jié)合外圍電路組成了土壤呼吸作用監(jiān)測系統(tǒng)核心電路板。在軟件設(shè)計(jì)方面,本文使用硬件濾波結(jié)合軟件濾波的方法消除信號干擾,提高了系統(tǒng)的測量精度。此外,本文還提出了一種土壤呼吸作用速率的循環(huán)測量方法,并編寫了配套的系統(tǒng)軟件。最后,將自主設(shè)計(jì)的基于長光程N(yùn)DIR型二氧化碳?xì)怏w傳感器應(yīng)用到土壤呼吸作用監(jiān)測系統(tǒng)中,并對系統(tǒng)進(jìn)行了組裝；通過野外試驗(yàn)驗(yàn)證了系統(tǒng)設(shè)計(jì)的正確性。
[Abstract]:Soil respiration, as the largest carbon pool and carbon cycle in the global terrestrial ecosystem, is often used as an important biological index of soil quality and soil fertility and an indicator of soil health. Therefore, the study of soil respiration and real-time monitoring is not only the key to accurately assess the global carbon balance, but also important for the current study of carbon cycle and slowing down the process of global Greenhouse Effect. The existing soil respiration monitoring devices, such as Li-8100 and Li-6400 of LI-COR Corporation in the United States, are expensive and less portable, limiting its popularity and development to a large extent. The aim of this paper is to design a portable soil respiration monitoring system with good repeatability and stability, low price and convenience. Firstly, the infrared spectrum sensing method is studied, in which the peak height measurement method provides the theoretical basis for the gas sensor quantification, and the long optical path theory provides the theoretical basis for the innovative design of the gas sensor chamber. Through soil respiration experiments, it is proved that the main component of soil respiration releasing gas is carbon dioxide gas. The characteristic wavelength of quantitative analysis of carbon dioxide gas is 4.26 渭 m, which is compared with NIST spectrum library. Secondly, the core component of soil respiration monitoring system, which is based on long-path NDIR technology, is designed based on the previous theoretical and technical guidance. The sensor uses single optical path and double wavelength differential measurement method to reduce the instability and optical path interference of infrared light source to a great extent. The detection ability and sensitivity of the monitoring system are improved by using multiple reflectors to improve the optical path and combined with the coating technology of the gas chamber. In the aspect of hardware design, the core circuit board of soil respiration monitoring system is composed of sensor and peripheral circuit. In the aspect of software design, the hardware filter combined with software filter is used to eliminate the signal interference and improve the measuring accuracy of the system. In addition, a cyclic measurement method of soil respiration rate is proposed and a complete system software is developed. Finally, the self-designed carbon dioxide gas sensor based on long-path NDIR is applied to the soil respiration monitoring system, and the system is assembled, and the correctness of the system is verified by field experiments.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S154;TP274

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 韓廣軒;周廣勝;;土壤呼吸作用時(shí)空動(dòng)態(tài)變化及其影響機(jī)制研究與展望[J];植物生態(tài)學(xué)報(bào);2009年01期

2 賈丙瑞;周廣勝;蔣延玲;王宇;殷曉潔;胡天宇;;寒溫針葉林土壤呼吸作用的時(shí)空特征[J];生態(tài)學(xué)報(bào);2013年23期

3 王旭;周廣勝;蔣延玲;李峰;;長白山紅松針闊混交林與開墾農(nóng)田土壤呼吸作用比較[J];植物生態(tài)學(xué)報(bào);2006年06期

4 蔣延玲,周廣勝,趙敏,王旭,曹銘昌;長白山闊葉紅松林生態(tài)系統(tǒng)土壤呼吸作用研究[J];植物生態(tài)學(xué)報(bào);2005年03期

5 孫敬松;周廣勝;韓廣軒;;太陽輻射對玉米農(nóng)田土壤呼吸作用的影響[J];生態(tài)學(xué)報(bào);2010年21期

6 韓廣軒;周廣勝;許振柱;楊揚(yáng);劉景利;史奎橋;;玉米農(nóng)田土壤呼吸作用的空間異質(zhì)性及其根系呼吸作用的貢獻(xiàn)[J];生態(tài)學(xué)報(bào);2007年12期

7 胡進(jìn)耀;吳慶貴;楊冬生;胡庭興;陳光升;;巴山水青岡林生態(tài)系統(tǒng)土壤呼吸作用及與溫度的關(guān)系[J];水土保持學(xué)報(bào);2009年02期

8 韓廣軒;周廣勝;許振柱;楊揚(yáng);劉景利;史奎橋;;玉米地土壤呼吸作用對土壤溫度和生物因子協(xié)同作用的響應(yīng)[J];植物生態(tài)學(xué)報(bào);2007年03期

9 鄭麗英;張益良;楊仁斌;孫元喜;;雙草醚對土壤呼吸作用及土壤酶活性的影響[J];農(nóng)業(yè)環(huán)境科學(xué)學(xué)報(bào);2007年03期

10 王旭;周廣勝;蔣延玲;賈丙瑞;王風(fēng)玉;周莉;;山楊白樺混交次生林與原始闊葉紅松林土壤呼吸作用比較[J];植物生態(tài)學(xué)報(bào);2007年03期

相關(guān)會(huì)議論文 前1條

1 賈丙瑞;周廣勝;王風(fēng)玉;王玉輝;;放牧與圍欄羊草草原土壤呼吸作用及其影響因子研究[A];推進(jìn)氣象科技創(chuàng)新加快氣象事業(yè)發(fā)展——中國氣象學(xué)會(huì)2004年年會(huì)論文集（下冊）[C];2004年

相關(guān)博士學(xué)位論文 前1條

1 賈丙瑞;放牧與圍欄羊草草原土壤呼吸作用研究[D];中國科學(xué)院研究生院（植物研究所）;2006年

相關(guān)碩士學(xué)位論文 前2條

1 王占華;四種常見農(nóng)藥對土壤呼吸作用的影響及其危害性評價(jià)[D];東北師范大學(xué);2004年

2 肖廣東;土壤呼吸作用紅外光譜傳感方法研究及監(jiān)測系統(tǒng)設(shè)計(jì)[D];安徽大學(xué);2015年

，

本文編號：1987075