平原区土壤质地的反射光谱预测与地统计制图

被引:14
作者
王德彩 [1 ,2 ]
邬登巍 [1 ]
赵明松 [1 ,2 ]
张甘霖 [1 ]
机构
[1] 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)
[2] 中国科学院研究生院
关键词
数字土壤制图; 平原区; 土壤质地; 地统计学; Kriging;
D O I
10.19336/j.cnki.trtb.2012.02.001
中图分类号
S153 [土壤化学、土壤物理化学]; S127 [遥感技术在农业上的应用];
学科分类号
082804 ;
摘要
基于地统计方法的土壤属性制图通常需要大量的采样与实验室测定。本研究提出利用可见光近红外(visible-nearinfrared spectroscopy,VNIR)光谱技术测定替代实验室测定,并与地统计方法相结合预测土壤质地的空间变异。通过建立砂粒(>0.02 mm),粉粒(0.002~0.02 mm),黏粒(<0.002 mm)含量的VNIR光谱预测模型,将模型预测得到的质地数据和建模点实测质地数据一同用于地统计分析和Kriging插值制图。以江苏北部黄淮平原地区为案例的研究结果表明,砂粒、粉粒、黏粒含量的预测值和实测值的均方根误差(RMSE)分别为8.67%、6.90%3、.51%,平均绝对误差(MAE)分别为6.46%、5.60%、3.05%,显示了较高的预测精度。研究为快速获取平原区土壤质地空间分布提供了新的可能的途径。
引用
收藏
页码:257 / 262
页数:6
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