本文關鍵詞： 土壤有機碳 空間分布 普通克里格模型 地統(tǒng)計學 小流域　出處：《山東農(nóng)業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：藥鄉(xiāng)小流域是魯中山區(qū)的典型區(qū)域,以藥鄉(xiāng)小流域林地土壤為研究對象,應用地統(tǒng)計學和GIS技術,研究分析藥鄉(xiāng)小流域林地土壤養(yǎng)分的空間分布特征,并探討藥鄉(xiāng)小流域林地土壤有機碳與土壤全氮、全磷、堿解氮和有效磷的相關性,可為魯中山區(qū)小流域林地土壤養(yǎng)分空間變異規(guī)律研究提供科學依據(jù),同時對于小流域尺度上的土壤有機碳空間變異研究,定量評價森林生態(tài)系統(tǒng)的生態(tài)服務功能具有重要指導意義。主要研究結果:(1)藥鄉(xiāng)小流域5種林地土壤同一土層的土壤容重差異不顯著。林地土壤有機碳、全氮、全磷、堿解氮、有效磷0-10 cm土層的含量大于10-20 cm土層的含量,均為中等變異。(2)藥鄉(xiāng)小流域林地在0~10 cm土層,土壤有機碳與全氮、全磷和堿解氮呈極顯著正相關,與土壤容重呈顯著負相關,與有效磷相關性不顯著;藥鄉(xiāng)小流域林地在10~20cm土層,土壤有機碳與全氮、全磷呈顯著正相關,與土壤容重、堿解氮和有效磷相關性不顯著;藥鄉(xiāng)小流域林地在0~20 cm土層,土壤有機碳與全氮、全磷呈極顯著正相關,與堿解氮呈顯著正相關,與土壤容重呈顯著負相關,與有效磷相關性不顯著。相關分析表明,藥鄉(xiāng)小流域林地土壤有機碳與土壤的全氮、全磷和堿解氮之間存在密切關系,與有效磷和土壤容重關系不密切。(3)藥鄉(xiāng)小流域林地土壤有機碳和氮磷元素空間分布特征:①藥鄉(xiāng)小流域林地土壤0-10 cm、10-20 cm和0-20 cm土層有機碳含量均表現(xiàn)出高強度的空間自相關性。藥鄉(xiāng)小流域東部和西北部積累了大量的有機碳,藥鄉(xiāng)小流域林地0-10 cm與0-20 cm土壤層的有機碳含量存在密切相關關系。從全方位來看,藥鄉(xiāng)小流域0-10 cm土層的有機碳含量分形維數(shù)最小,決定系數(shù)最大,表明有機碳含量的空間差異性大、為優(yōu)勢格局。②藥鄉(xiāng)小流域林地土壤10-20 cm土層全氮含量表現(xiàn)出中等的空間自相關性,0-10cm和0-20 cm土層全氮含量均表現(xiàn)出高強度的空間自相關性。藥鄉(xiāng)小流域中部和西北部積累了大量的全氮,藥鄉(xiāng)小流域林地0-10 cm與10-20 cm土壤層的全氮含量存在密切相關關系。從全方位來看,藥鄉(xiāng)小流域林地0-20 cm土層的全氮含量分形維數(shù)最大,表明全氮含量的空間差異性小、均一化程度越好。③藥鄉(xiāng)小流域林地土壤0-10 cm土層全磷含量表現(xiàn)出中等的空間自相關性,藥鄉(xiāng)小流域林地10-20 cm和0-20 cm土層全磷含量均表現(xiàn)出高強度的空間自相關性。藥鄉(xiāng)小流域西北部積累了大量的全磷。從全方位來看,藥鄉(xiāng)小流域林地10-20 cm土層的全磷含量分形維數(shù)最大,表明空間差異性小、均一化程度越好。④藥鄉(xiāng)小流域林地土壤0-10 cm土層堿解氮含量表現(xiàn)出中等的空間自相關性,藥鄉(xiāng)小流域林地10-20 cm和0-20 cm土層堿解氮含量均表現(xiàn)出高強度的空間自相關性。藥鄉(xiāng)小流域中部積累了大量的堿解氮。從全方位來看,藥鄉(xiāng)小流域林地0-10 cm土層的堿解氮含量分形維數(shù)最小,決定系數(shù)最大,表明堿解氮含量的空間差異性大,為優(yōu)勢格局。⑤藥鄉(xiāng)小流域林地土壤10-20 cm土層有效磷含量表現(xiàn)出中等的空間自相關性,藥鄉(xiāng)小流域林地0-10 cm和0-20 cm土層有效磷含量均表現(xiàn)出高強度的空間自相關性。藥鄉(xiāng)小流域北部積累了豐富的有效磷。從全方位來看,藥鄉(xiāng)小流域林地10-20 cm土層的有效磷含量分形維數(shù)最小,決定系數(shù)最大,表明有效磷含量的空間差異性大,為優(yōu)勢格局。
[Abstract]:Small watershed is a typical region in the mountainous rural medicine, to forest soil small watershed Yaoxiang as the research object, using geostatistics and GIS technology, analysis of distribution characteristics of soil nutrients in a small catchment of Yaoxiang space, and to explore the small watershed Yaoxiang soil organic C and soil total nitrogen, total phosphorus, nitrogen and phosphorus correlation and can provide a scientific basis for small watershed in mountain area of Shandong Province the spatial variability of soil nutrients at the same time, for the study of spatial variability of soil organic carbon content in small watershed scale, forest ecosystem has important guiding significance in quantitative evaluation of ecosystem service functions. The main results: (1) the soil bulk density difference of 5 kinds of soil Yaoxiang Small Watershed at the same soil layer is not significant. The soil organic carbon, total nitrogen, total phosphorus, available nitrogen content, available phosphorus content of 0-10 cm layer of soil above 10-20 cm, are moderate variation (2). Forest small watershed in 0~10 medicine cm soil layer, soil organic carbon and total nitrogen, total phosphorus and nitrogen were significantly positively correlated, negatively correlated with soil bulk density, no significant correlation with available phosphorus; forest small watershed of medicine in the 10~20cm soil layer, soil organic carbon and total nitrogen, total phosphorus was positively correlated with. The soil bulk density, nitrogen and phosphorus had no significant correlation; forest small watershed in 0~20 medicine cm soil layer, soil organic carbon and total nitrogen, total phosphorus was significantly positively correlated, and nitrogen were significantly positively correlated negatively correlated with soil bulk density, no significant correlation with available phosphorus. Correlation analysis showed that total nitrogen in small watershed soil organic carbon and soil medicine, there is a close relationship between nitrogen phosphorus and alkali solution, not closely with available phosphorus and soil bulk density. (3) the distribution characteristics of small watershed forest Yaoxiang soil organic carbon and nitrogen phosphorus space: the small stream of Medicine The soil domain land 0-10 cm, 10-20 cm and 0-20 cm soil organic carbon content showed high intensity spatial autocorrelation. Eastern and northwest watershed Yaoxiang accumulated large amounts of organic carbon, there is close correlation between the organic carbon content of 0-10 cm and Yaoxiang small watershed forest 0-20 cm soil layer. From the full range of view. Small watershed Yaoxiang 0-10 cm soil organic carbon content of the fractal dimension of the smallest decision coefficient is the biggest show spatial differences in organic carbon content of soil, is the dominant pattern. The small watershed Yaoxiang 10-20 cm soil total nitrogen content showed moderate spatial autocorrelation, 0-10cm and 0-20 cm soil total nitrogen content showed a high strength spatial autocorrelation. Central and northwest watershed Yaoxiang accumulated a large amount of nitrogen, there is close correlation between the total nitrogen content of small watershed land 0-10 cm Yaoxiang and 10-20 cm soil layer from all directions to. Look, the small watershed forest Yaoxiang 0-20 cm soil total nitrogen content showed that the maximum fractal dimension, spatial difference of total nitrogen content of small, uniform degree better. The total phosphorus content of the soil in the small watershed of Yaoxiang 0-10 cm soil layer showed moderate spatial autocorrelation, the total phosphorus content of 10-20 cm and Yaoxiang small watershed forest soil was 0-20 cm showed high intensity spatial autocorrelation. The northwest watershed has accumulated a large number of rural medicine total phosphorus. From the full range of view, Yaoxiang small watershed land 10-20 cm soil total phosphorus content showed the highest fractal dimension, spatial difference is small, the homogenization degree is better. The small watershed soil 0-10 cm soil nitrogen Yaoxiang the content showed moderate spatial autocorrelation, Yaoxiang small watershed land 10-20 cm and 0-20 cm soil nitrogen content showed high intensity spatial autocorrelation. The small watershed in the accumulation of a large number of Rural Medicine N. From the full range of view, Yaoxiang small watershed land 0-10 cm soil nitrogen content of the fractal dimension of the smallest decision coefficient is the largest, show that the spatial difference of nitrogen content of large, dominant pattern. The content of 10-20 cm soil available phosphorus and soil small watershed Yaoxiang showed moderate spatial autocorrelation. 0-10 cm and 0-20 cm soil available phosphorus content showed small watershed forest Yaoxiang high intensity spatial autocorrelation. The northern watershed Yaoxiang accumulation of effective phosphorus rich. From the full range of view, Yaoxiang small watershed land 10-20 cm soil available phosphorus content of the fractal dimension of the smallest decision coefficient is the biggest show spatial differences in available phosphorus content the large, dominant pattern.

【學位授予單位】：山東農(nóng)業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：S714.2

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相關期刊論文 前1條

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