文档介绍：
复杂地貌类型区耕地土壤有机质空间插值
方法研究#
龙军,张黎明,周碧青,毛艳玲,邱龙霞,邢世和**
5
10
15
20
(福建农林大学资源与环境学院,福州 350002)
摘要:选择适宜区域特征的高效点面拓展模型对揭示土壤属性空间分布规律具有重要意义。
本研究根据不同地貌类型特征在福建省各地级市选取了闽侯、建瓯、永定、大田、涵江、福
鼎、南安、同安和漳浦 9 个典型县(市、区),利用 9 个典型区 2008 年采集的 29 320 个样
点数据系统评价了不同空间插值方法对全省耕地土壤有机质含量推算精度的影响,以期获得
适宜福建省耕地的有机质空间插值点面拓展模型。结果表明,福建省不同地级市典型县耕地
土壤有机质平均含量为 g kg-1,变异系数是 %,具有强烈的空间自相关性,半方
差函数以指数模型拟合效果最佳;其中闽侯、建瓯、永定、涵江和福鼎市(县、区)最优地
统计插值法为泛克里格法,最优确定性插值法为反距离权重法,且泛克里格法插值精度高于
反距离权重法;而大田县最优地统计插值法是简单克里格法,最优确定性插值法为反高次曲
面函数法,且简单克里格法插值精度高于反高次曲面函数法;南安、同安和漳浦县(市、区)
最优地统计插值法是普通克里格法,最优确定性插值法为张力样条函数法,且除漳浦县外采
用普通克里格法插值精度均高于张力样条函数法。总体来看,福建省平原或盆地、丘陵和山
地分布面积相当的地区(例如,闽侯县、建瓯市、永定县、涵江区隶和宁德市)采用泛克里
格法进行有机质空间插值的精度较高,山地为主的地区(例如,大田县)采用简单克里格法
插值的精度较高,而以平原、台地为主的地区(例如,南安市、同安区和漳浦县)则采用普
通克里格或张力样条函数法插值的精度较高。
关键词:土壤学;地貌类型;耕地;土壤有机质;空间插值;福建省
中图分类号:S15
25
Study on the best spatial interpolation method for arable soil
organic matter plex geomorphic area
Long Jun, Zhang Lingming, Zhou Biqing, Mao Yanling, Qiu Longxia, Xing Shihe
(College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou
30
35
40
45
350002)
Abstract: Selection of efficient point to plane expanding method adapting regional characteristic is
great significance in revealing spatial distribution and variability of soil. In this study, according to
geomorphic type, nine counties, namely Minhou, Jian’ou, Yongding, Datian, Hanjiang, Fuding, Nan’an,
Tong’an, Zhangpu, located in different prefecture-level cities in Fujian Province, China, were selected
as typical study zones. Based on the data of field measurements 12 521 sampling sites in 2008,
scattered in these nine counties, analysis was carried out of influences of different interpolations for
arable anic matter on prediction accuracy so as to obtain suitable interpolation method of spatial
prediction for arable anic matter in Fujian Province, China. Results show that the average
content of arable anic matter in Fujian as a whole was g kg-1 and coe