發(fā)布時(shí)間：2018-05-04 07:31

  本文選題：喀斯特小流域 + 黃壤　； 參考：《生態(tài)學(xué)雜志》2016年10期

【摘要】：本文分析了黃壤中總硫、SO_4~(2-)、總還原態(tài)無(wú)機(jī)硫(TRIS)和有機(jī)硫的含量,以及硫酸鹽還原菌(SRB)類(lèi)群和數(shù)量,目的是闡明西南酸沉降地區(qū)土壤中硫形態(tài)和SRB的分布特征。結(jié)果表明:有機(jī)硫是主要的硫形態(tài),SO_4~(2-)是主要的無(wú)機(jī)硫形態(tài);黃壤剖面不同深度均檢出脫硫弧菌屬-脫硫微菌屬,指示脫硫弧菌屬-脫硫微菌屬是黃壤中SRB的優(yōu)勢(shì)類(lèi)群;黃壤剖面中SRB數(shù)量與TRIS含量增加的深度與SO_4~(2-)-S含量降低的深度基本一致,指示黃壤中存在SO_4~(2-)異化還原反應(yīng),并且TRIS是主要產(chǎn)物;生物滯留后剩余SO_4~(2-)的吸附、解吸、淋溶遷移及深層吸附與累積導(dǎo)致剖面底層SO_4~(2-)-S含量增加;酸沉降輸入的SO_4~(2-)主要以有機(jī)硫和吸附態(tài)SO_4~(2-)滯留在黃壤中,在硫的年沉降速率大幅降低后,在較長(zhǎng)時(shí)期內(nèi),黃壤中有機(jī)硫礦化和吸附態(tài)SO_4~(2-)解吸可能釋放大量SO_4~(2-)進(jìn)入地表和地下水體,與之相關(guān)的土壤理化性質(zhì)變化和水體化學(xué)組成改變等方面的環(huán)境效應(yīng)值得關(guān)注。
[Abstract]:In this paper, the contents of total sulfur, total reducing inorganic sulfur (TRIS) and organic sulfur in yellow soil, and the group and quantity of sulfate-reducing bacteria (SRBs) were analyzed. The purpose of this paper was to clarify the form of sulfur and the distribution characteristics of SRB in soils of southwest acid deposition area. The results showed that organic sulfur was the main sulfur form so _ 4 ~ + _ (2) was the main inorganic sulfur form, Vibrio desulphurization genus was found in different depth of yellow soil profile, indicating that Vibrio desulphurization genus was the dominant group of SRB in yellow soil. The increasing depth of SRB and TRIS content in yellow soil profile is basically consistent with the depth of decreasing SO_4~(2-)-S content, indicating that there is a dissimilatory reduction reaction in yellow soil, and TRIS is the main product. Leaching migration and deep adsorption and accumulation resulted in the increase of SO_4~(2-)-S content in the bottom layer of the profile, and so _ 4 / T _ (2), which was imported by acid deposition, was mainly retained in yellow soil by organic sulfur and adsorption state so _ 4 ~ (2). After the annual deposition rate of sulfur decreased significantly, the content of SO_4~(2-)-S in the bottom layer of the profile was decreased significantly, and for a longer period of time, Organic sulfur mineralization and sorption state so _ 4N _ 2-desorption in yellow soil may release a large amount of so _ 4 ~ (+) _ 2) into surface and underground water bodies. The environmental effects related to the changes of soil physical and chemical properties and chemical composition of water bodies are worthy of attention.
【作者單位】： 貴州師范學(xué)院地理與旅游學(xué)院;中國(guó)科學(xué)院地球化學(xué)研究所環(huán)境地球化學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41463004和41573081) 貴州省自然科學(xué)基金項(xiàng)目(黔科合J字[2014]2135) 中國(guó)博士后基金項(xiàng)目(2015M572502)資助
【分類(lèi)號(hào)】：S153;S154.3

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本文編號(hào)：1842141