南亚热带人工林土壤有机碳库、红外光谱及营养元素特征分析

发布时间：2018-03-02 02:15

本文关键词： 有机碳碳含量碳储量红外光谱营养元素　出处：《广西大学》2017年硕士论文　论文类型：学位论文

【摘要】：本课题对南亚热带人工林土壤有机碳稳定机理展开研究,探讨了人工林土壤有碳含量及碳储量、土壤红外波谱特征、以及土壤营养元素的含量和储量的特征,为南亚热带地区人工林土壤层的碳汇工作提供科学的参考。主要研究结果如下:(1)土壤总有机碳0-20cm 土层土壤的有机碳含量范围介于21.88～35.57 g.kg-1之间,不同人工林0-20cm 土层土壤总有机碳含量排序表现为延河马尾松武鸣马尾松灰木莲荷木马尾松石栎铁坚油杉红椎八角。(2)土壤总有机碳储量范围介于134.69～162.23 t·hm-2之间,不同人工林0-20cm 土层土壤总有机碳含量排序表现为延河马尾松荷木马尾松石栎武鸣马尾松灰木莲铁坚油杉红椎八角。凋落物层总有机碳含量介于441.42～526.97 g.kg-1之间。(3)人工林红外光谱吸收峰主要集中在400～2000 cm-1,3500～3700 cm-1两个大区域内,根据不同红外光谱吸收峰推测土壤中的化学键主要有Si—O—Al 的 Si—O 键、Si—O—Si 的 Si—O 键、Si—O 键、Al—O—H 的O—H键、烯烃C=C键、O—H键、饱和烷烃C—H键等化学键。依据各人工林吸收光谱特征峰不同推测,各植被类型下土壤中的矿物组成主要有高岭石、蒙脱石、埃洛石等。(4)土壤0-20cm 土层氮元素的含量范围介于0.93～2.33 g.kg-1之间,土壤氮元素储量范围介于6.08～16.24 g.kg-1之间,其中0-20cm 土层土壤的氮元素储量范围介于2.56～6.36 g.kg-1之间。凋落物层氮元素含量范围介于9.47～16.10 g.kg-1之间。(5)土壤0-20cm 土层磷元素的含量范围介于0.28～0.41 g kg-1之间,土壤磷元素储量范围介于2.71～4.03 g.kg-1之间,其中0-20cm 土层土壤的磷元素储量范围介于0.71～1.14 g.kg-1之间。凋落物层磷元素含量范围介于0.35～0.81 g·kg-1之间。
[Abstract]:In this paper, the mechanism of soil organic carbon stabilization in subtropical plantations was studied, and the characteristics of soil carbon content and carbon storage, soil infrared spectrum, and the contents and reserves of soil nutrient elements were discussed. The main results are as follows: (1) the soil organic carbon content of 0-20 cm soil layer is between 21.88 ~ 35.57 g 路kg ~ (-1). The order of soil total organic carbon content in 0-20cm soil layer of different plantations was that the order of soil total organic carbon content was 134.69 ~ 162.23 t 路hm-2, and the order of soil total organic carbon content was as follows: Pinus massoniana, Pinus massoniana, Pinus massoniana, Pinus massoniana, Korean lotus, Pinus massoniana, Pinus massoniana, Pinus massoniana, Pinus massoniana L. The order of soil total organic carbon content of different plantations in 0-20cm soil layer was as follows: Pinus massoniana, Pinus massoniana, Pinus massoniana, Quercus massoniana, Quercus massoniana, Quercus massoniana, Pinus massoniana, Pinus massoniana, Pinus massoniana, Pinus massoniana, Pinus massoniana, red vertebrae anise. The absorption peaks of infrared spectrum are mainly concentrated in the two large regions of 400cm-1 + 3500 cm-1, and the absorption peaks of the infrared spectrum are mainly in the region of 300,700 cm-1. According to the absorption peaks of different infrared spectra, the main chemical bonds in soil include Si-O bond of Si-O-Al, Si-O-Si bond of Si-O-Si bond of Si-O bond, O-H bond of Al-O-H bond, O-H bond of alkene C bond, C-H bond of saturated alkane, and so on. The mineral composition of soil under different vegetation types is mainly kaolinite, montmorillonite, Ellopite, etc.) the content of nitrogen elements in 0-20cm soil layer is between 0.93n2.33 g 路kg-1, and the range of soil nitrogen storage is between 6.08g 路kg-1 and 16.24g.kg-1. The range of nitrogen storage in 0-20cm soil layer was between 2.56 ~ 6.36 g 路kg ~ (-1), and that in litter layer was between 9.47 ~ (16. 10) g 路kg ~ (-1) and 0.28 ~ (0.41 g kg-1) in 0-20 cm soil layer, and in 2.71 ~ (4.03) g 路kg ~ (-1) in soil layer, and in litter layer soil layer was in the range of 9.47 ~ (16. 10) g 路kg ~ (-1) and 0.28 ~ (0.41) g / kg ~ (-1), respectively. The range of phosphorus in 0-20cm soil layer was between 0.71 ~ 1.14 g 路kg ~ (-1) and in litter layer was 0.35 ~ 0.81 g 路kg ~ (-1).
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S714.2

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