秦岭林区华山松林与云杉林土壤碳密度特征

发布时间：2018-01-13 21:39

本文关键词：秦岭林区华山松林与云杉林土壤碳密度特征　出处：《西北农林科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：秦岭地区是中国的一个重要组成部分,其环境问题与人们息息相关。随着经济的不断发展,其环境问题日益严重,解决水土流失等问题已经刻不容缓,因此,对该区的土壤的研究非常重要。通过对秦岭林区华山松与云杉林不同地区土壤各层有机碳密度的测定,包括宁东、宁西、龙草坪和太白,采用室外采样和室内分析的方法,可以得出,在秦岭林区华山松与云杉林不同区域土壤有机碳密度存在一定的差异。结果表明:(1)就整体而言,华山松林的土壤有机碳密度为132.2 t/hm2,云杉林的土壤有机碳密度为157.8 t/hm2。可以看出,华山松林的土壤有机碳密度是小于云杉林土壤有机碳密度的。(2)随着海拔的升高,华山松和云杉林土壤有机碳密度呈逐渐增大的趋势。(3)随着土层的加深,土壤有机碳密度逐渐减小。(4)土壤A层、B层、C层和整体的有机碳密度均是阴坡阳坡。无论是阴坡还是阳坡,云杉的土壤碳密度大于华山松的碳密度。(5)坡位对两者的影响大概是相同的,都是下坡位土壤有机碳密度中坡位土壤有机碳密度上坡位土壤有机碳密度,在相同坡位时,云杉林土壤有机碳密度大于华山松土壤有机碳密度。针对以上结果,我们应该提高保护环境的意识,合理利用林地,促进当地的经济发展。
[Abstract]:Qinling region is an important part of China, its environmental problems are closely related to people. With the development of economy, its environmental problems become more and more serious, so it is urgent to solve the problems of soil and water loss. It is very important to study the soil in this area. Through the determination of soil organic carbon density in different areas of Pinus huashanensis and Picea lanceolata in Qinling forest area, including Ningdong, Ningxi, Dragon Lawn and Taibai. By means of outdoor sampling and indoor analysis, it can be concluded that there are some differences in soil organic carbon density between Pinus huashanensis and Picea lanceolata in Qinling forest area. The soil organic carbon density of Pinus armandii forest was 132.2 t / hm ~ (2), and that of Picea lanceolata forest was 157.8 t / hm ~ (2). The soil organic carbon density of Pinus armandii forest is smaller than that of Picea lanceolata forest. Soil organic carbon density of Pinus huashanensis and Picea chinensis forest increased gradually with the deepening of soil layer, soil organic carbon density decreased gradually. C layer and the whole organic carbon density are both shady slope and sunny slope. The soil carbon density of spruce is larger than that of Pinus armandii. The soil organic carbon density in the downhill position is middle slope soil organic carbon density. In the same slope position, the soil organic carbon density of the Picea lanceolata forest is higher than that of the Pinus huashanensis soil organic carbon density. We should improve the awareness of environmental protection, rational use of woodland, and promote local economic development.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：S714.2

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