钟祥市平原、丘陵土壤养分空间变异性研究

[目的]本文研究了不同地形和地貌条件下土壤养分空间变异性差异规律。[方法]使用经典统计学和地统计学相结合的方法,研究了钟祥市土壤养分在不同地形和方向上的空间变异性特征。[结果]在不同地形中,土壤有机质、有效磷和速效钾的变异系数在23.79%-69.78%,属于中等变异;数据经过Box-Cox转换后,均为正态分布。丘陵地区的土壤养分均大于平原,平原地区的有机质空间相关性大于丘陵,有效磷东部的空间相关性大于西部,速效钾西部的空间相关性大于东部,说明在同一流域相同地形条件下的土壤养分在水平和垂直方向上的变异规律并不统一,这是自然环境与人为因素共同作用下产生的结果。[结论]研究区土壤养分在水平和垂直方...

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Published in西南农业学报 Vol. 30; no. 9; pp. 2078 - 2084
Main Author 闫豫疆 陈冬花 严玉鹏
Format Journal Article
LanguageChinese
Published 新疆维吾尔自治区卫星应用中心,新疆乌鲁木齐,830000%华中农业大学资源与环境学院,农业部长江中下游耕地保育重点实验室,湖北武汉430070 2017
Subjects
土壤养分
地形地貌
地统计学
空间变异
土壤养分
Spatial variability
Topography
Geostatistics
Soil nutrients
地统计学
地形地貌
空间变异
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ISSN1001-4829
DOI10.16213/j.cnki.scjas.2017.9.026

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Summary:[目的]本文研究了不同地形和地貌条件下土壤养分空间变异性差异规律。[方法]使用经典统计学和地统计学相结合的方法,研究了钟祥市土壤养分在不同地形和方向上的空间变异性特征。[结果]在不同地形中,土壤有机质、有效磷和速效钾的变异系数在23.79%-69.78%,属于中等变异;数据经过Box-Cox转换后,均为正态分布。丘陵地区的土壤养分均大于平原,平原地区的有机质空间相关性大于丘陵,有效磷东部的空间相关性大于西部,速效钾西部的空间相关性大于东部,说明在同一流域相同地形条件下的土壤养分在水平和垂直方向上的变异规律并不统一,这是自然环境与人为因素共同作用下产生的结果。[结论]研究区土壤养分在水平和垂直方向上的变异规律并不统一,尤其是在地理条件多变的丘陵流域范围内,养分的空间变异性受自然因素的影响较大。
Bibliography:Geostatistics; Spatial variability ; Topography ; Soil nutrients
51-1213/S
[ Objective ] The present paper aimed to study the spatial variability of soil nutrients under different terrain and topography condi-tions. [ Method ] Classical statistics combined with Geostatistics were applied to analyze the spatial variability of soil nutrients in different ter-rain and direction of Zhongxiang city. [ Result ] The coefficient of variation of soil organic matter, available P and available K in different ter-rain were between 23.79 % and 69.78 % and belonged to moderate variation ; All data were normally distributed after Box-Cox transforma-tion. Soil nutrient content in the hills was higher than that in the plain. The spatial correlation of soil organic matter in plains was greaterthan that in hills. The spatial correlation of available P in eastern part was greater than that in the western part, but the available K was op-posite. The results indicated that the spatial variability of soil nutrients in horizontal and
ISSN:1001-4829
DOI:10.16213/j.cnki.scjas.2017.9.026