Effect of Sand-Stabilization Engineering on Soil Humus and Components by Analysis by Several Spectroscopy Methods
ZHANG Yu-lan1, 2, 3, SUN Cai-xia4, DUAN Zheng-hu1, CHEN Li-jun2*, WU Zhi-jie2, CHEN Xiao-hong1, ZHANG Ai-ming2, LIU Xing-bin2, WANG Jun-yu2
1.Cold and Arid Regions Engineering and Environment Research Institute, Chinese Academy of Sciences, Lanzhou 730009, China 2.Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China 3.Key Laboratory of Terrestrial Ecological Process, Chinese Academy of Sciences, Shenyang 110016, China 4.College of Science, Northeastern University, Shenyang 110004, China
Abstract：After the potassium bichromate-strong sulfuric acid hot process, the ultraviolet spectrophotometer was used on the contrast with the traditional titrimetric method to analyze soil (51 years, 43 year, 32 year, 20 year vegetations restores in the Tenggeli sand) humus and the humus components content.At the same time, the infrared spectrum was used to discuss their structure change during restoring process.The result indicated that using the visible spectroscopy method for the determination of the humus and the humus component is feasible.The spectroscopy method determination of organic matter is better (coefficient of variation at most is 7.26%) than the traditional titrimetric method, as it is accurate, fast and simple, and favors large quantities.The result indicated that humus content presents increasing tendency along with restoring ages.Change is big in early restore time, and tends to be stable in the later period.Infrared spectrum shape is similar, but the characteristic peak intensity has obvious difference.Compared with the wind-drift sand, little molecule saccharides decrease and aryl-groups increase.
Key words：Tengger Sands;Shapotou Research Station;Ecological restoration;Humus;Infrared spectrum characteristics
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