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县域土壤pH值的空间变异性特征研究

发表时间:2010-09-30  浏览量:1249  下载量:423
全部作者: 杨红,邵孝侯,包欢
作者单位: 河海大学水利水电学院;四川农业大学资源环境学院
摘 要: 利用地统计学与地理信息系统(geographical information system,GIS)空间分析技术相结合的方法,对双流县623个土壤pH值样本数据进行处理,并对其空间变异性特征进行研究和探讨。结果表明:1) 双流县土壤平均pH值为6.06,属于弱酸性,各样点pH值显极酸性2%,较强酸性5%,强酸性15%,中酸性31%,弱酸性23%,中性15%;2) 双流县土壤pH值的块金值/基台值为68%,具有中等程度的空间相关性,相关距为3 600 m,其变化主要受结构性因子和随机性因子共同影响;3) 双流县土壤pH值呈地带性分布,在东南方山地、丘陵一带有从高值区向低值区过渡的明显趋势,在西北平原方向上变化较小。
关 键 词: 土壤学;半方差函数;地统计学;空间变异
Title: Study on the spatial variability characteristic of soil pH of county territory
Author: YANG Hong, SHAO Xiaohou, BAO Huan
Organization: College of Water Conservancy and Hydropower Engineering, Hohai University; College of Resources and Environment, Sichuan Agricultural University
Abstract: This paper has done with the Shuangliu county soil pH value of 623 sampled data and conducted the research and the discussion to its spatial variability characteristic by using the method combining statistics and the geographical information system (GIS) spatial analysis technology. The results indicate: 1) The average value (6.06) of Shuangliu county’s soil pH belongs to low-acid value. In the various sampling points, very strong acid accounts for 2%, relative strong acid accounts for 5%, strong acid accounts for 15%, medium acid accounts for 31%, the low acid accounts for 23%, and neutrality accounts for 15%. 2) The block gold number/pedestal base value is 68% of Shuangliu county’ soil pH, explaining it has the medium degree spatial relevance. The related distance is 3 600 m, and its change is mainly influenced by constitutive factor and randomness factor. 3) Shuangliu county’s soil pH assumes the zonality distribution. The pH values of the areas in the southeast mountainous region and the hill have obvious transition tendency from high to low, but changes in the direction of northwest plain are smaller.
Key words: soil science; semivariance function; geostatistics; spatial variability
发表期数: 2010年9月第18期
引用格式: 杨红,邵孝侯,包欢. 县域土壤pH值的空间变异性特征研究[J]. 中国科技论文在线精品论文,2010,3(18):1873-1879.
 
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