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通过统计及地质统计学方法,研究了山东省聊城市1985—2005年土壤w(有机质)的时空变异性.结果表明:近20年来聊城市表层土壤有机质共增加了34.31×104 t,但不同土壤类型的增幅不尽相同,本底值较低的土壤亚类有机质增加较多,本底值较高的则增加较少.2005年w(有机质)插值结果表明,研究区w(有机质)分布存在四周高、中部低的趋势.聊城市北部、临清县南部以及高唐与茌平县之间部分区域w(有机质)比1985年下降明显,而冠县以南及以北、茌平县东部及南部部分区域的w(有机质)增加明显.影响土壤有机质时空变异的因素主要为土壤类型和区域内农业种植及生产管理方式的改变.
The spatial and temporal variability of soil w (organic matter) from 1985 to 2005 in Liaocheng City of Shandong Province was studied by means of statistics and geostatistics.The results showed that the organic matter in the surface soil of Liaocheng City increased by 34.31 × 104 t in the recent 20 years, The increase of different types of soil showed that the content of organic matter in the soil sub-class with lower background value increased more, while the background value increased slightly with less.The results of w (organic matter) interpolation in 2005 indicated that the distribution of w (organic matter) Around the high and low in the middle part.W (organic matter) in northern part of Liaocheng City, southern part of Linqing County and some areas between Gaotang and Chiping County decreased significantly compared with that of 1985, while the south of Guan County and the north and the east of Chiping County And the w (organic matter) in the southern part increased obviously.The main factors affecting the spatio-temporal variation of soil organic matter were soil types and the changes of agricultural planting and production management in the area.