青海湖流域土壤大孔隙特征与理化性质的相关性研究
发布时间：2019-01-18 09:32
【摘要】：土壤大孔隙是土壤水分、空气和化学物质运移优先流的主要途径。本文以青海湖流域土壤为研究对象,在青海湖沙柳河流域取原状土柱,利用CT扫描与Fiji软件相结合的方法,实现了土壤大孔隙结构的三维可视化,以及断层横截面土壤大孔隙度、大孔隙数量和大孔隙等效直径等的量化;并探讨了样地土壤大孔隙特征与理化性质的相关性。结果表明:青海湖流域土壤大孔隙主要分布在土壤表层0~100 mm,100 mm以下大孔隙较少;土壤全磷含量分别与土壤大孔隙数量、大孔隙等效直径有显著相关性;土壤全氮、有机质含量分别与土壤大孔隙平均等效直径有显著相关性;土壤体积质量与大孔隙度、大孔隙平均等效直径等有显著相关性;土壤中0.002≤Ф0.02 mm的颗粒含量与大孔隙的分布特征相关性较大。
[Abstract]:Soil macropores are the main pathways for preferential flow of soil moisture, air and chemicals. In this paper, taking the soil of Qinghai Lake basin as the research object, taking the undisturbed soil column in the Shaliuhe River basin of Qinghai Lake, using the method of combining CT scanning and Fiji software, the 3D visualization of soil macroporous structure is realized. And the quantification of the soil macroporosity, the number of macropores and the equivalent diameter of macropores, etc. The correlation between soil macroporosity and physical and chemical properties was also discussed. The results showed that the distribution of soil macropores in Qinghai Lake basin was less than 0 ~ 100 mm,100 mm, and there was a significant correlation between soil total phosphorus content and the amount of macropores and the equivalent diameter of macropores. The content of soil total nitrogen and organic matter were significantly correlated with the mean equivalent diameter of the soil macropores, and the soil volume mass was significantly correlated with the macroporosity, the mean equivalent diameter of the macropores and so on. The particle content of 0.002 鈮，
本文编号：2410564
[Abstract]:Soil macropores are the main pathways for preferential flow of soil moisture, air and chemicals. In this paper, taking the soil of Qinghai Lake basin as the research object, taking the undisturbed soil column in the Shaliuhe River basin of Qinghai Lake, using the method of combining CT scanning and Fiji software, the 3D visualization of soil macroporous structure is realized. And the quantification of the soil macroporosity, the number of macropores and the equivalent diameter of macropores, etc. The correlation between soil macroporosity and physical and chemical properties was also discussed. The results showed that the distribution of soil macropores in Qinghai Lake basin was less than 0 ~ 100 mm,100 mm, and there was a significant correlation between soil total phosphorus content and the amount of macropores and the equivalent diameter of macropores. The content of soil total nitrogen and organic matter were significantly correlated with the mean equivalent diameter of the soil macropores, and the soil volume mass was significantly correlated with the macroporosity, the mean equivalent diameter of the macropores and so on. The particle content of 0.002 鈮，
本文编号：2410564
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