本文關(guān)鍵詞：澧陽平原古水稻土有機(jī)質(zhì)紅外光譜特征　出處：《土壤學(xué)報(bào)》2016年04期 　論文類型：期刊論文

  更多相關(guān)文章： 澧陽平原 古水稻土 有機(jī)質(zhì) 光譜特征

【摘要】：澧陽平原杉龍崗古水稻土遺址剖面中不同耕作年限、不同環(huán)境條件、不同深埋的有機(jī)質(zhì)的積累與遷移變化明顯。以澧陽平原杉龍崗古水稻土遺址為研究對(duì)象,采用溴化鉀壓片法對(duì)剖面中古水稻土和現(xiàn)代耕作水稻土進(jìn)行紅外光譜測(cè)定,分析土壤中有機(jī)質(zhì)的官能基團(tuán)以及各基團(tuán)的結(jié)構(gòu)特征。結(jié)果表明,古水稻土官能基團(tuán)的振動(dòng)主要集中在鹵素化合物和無機(jī)化合物,有機(jī)質(zhì)對(duì)古水稻土官能團(tuán)影響很大,其中,古水稻土中波數(shù)1 882 cm-1(烯烴碳)在去有機(jī)質(zhì)后吸收峰弱化;古水稻土中波數(shù)為1 631~470 cm-1段,逐漸形成苯環(huán)、烯烴化合物且芳構(gòu)化程度增加,鹵素和無機(jī)化合物的結(jié)合力增強(qiáng)。由一階導(dǎo)數(shù)可知,古水稻土與現(xiàn)代耕作水稻土相差不大,在去有機(jī)質(zhì)后,波峰均被弱化且FD值峰值均小于去有機(jī)質(zhì)前FD值。
[Abstract]:Different cultivation age Liyang plain Shan Longgang ruins of ancient paddy soil profile in different environmental conditions, accumulation and migration changes of organic matter in different depth is obvious. In Liyang plain Shan Longgang ancient paddy soil site as the research object, the middle section of paddy soil and farming paddy soil were analyzed by IR using potassium bromide compression method, analysis of soil organic matter in functional groups and structural characteristics of each group. The results show that the vibration of ancient paddy soil functional groups mainly concentrated in halogen compounds and inorganic compounds, organic matter, influence on ancient paddy soil groups in ancient paddy soil in the wave number of 1882 cm-1 (olefin carbon) absorption peak in organic matter after weakening; wavenumber in ancient paddy soil was 1 631~470 cm-1 segment, gradually formed the benzene ring, alkenes and aromatization degree increase, and enhance the binding force of halogen and inorganic compounds by first derivative. It is known that there is no difference between the ancient paddy soil and the modern tillage paddy soil. After removing organic matter, the peak of the wave peak is weakened and the peak value of the FD value is less than the FD value before the organic matter.

【作者單位】： 湖南農(nóng)業(yè)大學(xué)資源環(huán)境學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41371228)資助~~
【分類號(hào)】：S153.621
【正文快照】： 隨著水稻考古研究的發(fā)現(xiàn),有關(guān)古水稻土形成與演變、土壤肥力特征、養(yǎng)分的釋放、質(zhì)量特征、生物學(xué)特性、植硅體形態(tài)及其礦化等方面已引起了科學(xué)家的關(guān)注[1-3],目前有關(guān)在水耕條件下由于環(huán)境演變、地質(zhì)條件變化、自然災(zāi)害導(dǎo)致水稻土被掩埋或覆蓋的古水稻土土壤有機(jī)質(zhì)的積累與轉(zhuǎn)

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相關(guān)期刊論文 前1條

1 甘化民,張一平;陜西五種土壤紅外光譜特征的初步研究[J];土壤學(xué)報(bào);1992年02期

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本文編號(hào)：1375410