干旱区生态环境知识资源中心(Arid): 民勤绿洲土壤盐分组成与光谱特征

Arid

	民勤绿洲土壤盐分组成与光谱特征
其他题名	Soil salt components and their spectral characteristics in Minqin Oasis of Northwest China
	张建明 1; 齐文文 2
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2013
卷号	32 期号:10 页码:2620-2626
中文摘要	基于野外采样和实验室分析,研究了民勤绿洲土壤的可溶盐特征。结果表明,表层土壤中阴离子以氯离子和硫酸根离子为主,阳离子以钙离子和镁离子比重较大;民勤表层土壤中硫酸盐矿物居多,硫酸根离子易与阳离子结合形成硫酸盐化合物,而且硫酸根离子与钙、镁离子的相关系数达0.918、0.933,说明土壤中硫酸根离子与钙离子、镁离子是主要的结合方式。采用线性方程拟合土壤浸提液电导率和土壤全盐量的关系,精度较高。通过表层土壤的光谱测量和光谱特征分析,发现反射率一阶微分和反射率对数一阶微分两种变换形式与土壤全盐量的相关性最强。利用多元逐步线性回归方法,以反射率对数一阶微分为自变量的回归方程效果最佳,预测方程的决定系数达到0.789。
英文摘要	Based on field sampling and laboratary analysis, this paper studied the characteristics of soil soluble salts in Minqin Oasis of Northwest China. The dominant anions in the surface soil were Cl~- and SO_4~(2-), and the main cations were Ca~(2+) and Mg~(2+). The correlation coefficients of the SO_4~(2-) with the Ca~(2+) and Mg~(2+) were 0.918, and 0.933, respectively, illustrating that the SO_4~(2-) was mainly combined with the Ca~(2+) and Mg~(2+). There was a higher precision when using linear equation to fit the relationships between the soil electrical conductivity and soil total salt content. Through the measuremnt of surface soil extract spectra and the analysis of surface soil spectral characteristics, it was found that the two transformations of first-order differentiation of reflectivity and logarithmic reflectivity had the strongest correlations with the soil total salt content. The soil total salt content was further predicted by multiple linear regressions, and the regression equation with the first-order differentiation of logarithic reflectance as the independent variable had the best effect, with the determination coefficient (R~2) being 0.789.
中文关键词	民勤绿洲 ; 土壤全盐量 ; 电导率 ; 土壤光谱特征 ; 光谱微分处理
英文关键词	Minqin Oasis soil total salt content electrical conductivity soil spectral characteristics spectral differentiation analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4953308
来源机构	兰州大学 ; 中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230080
作者单位	1.兰州大学资源环境学院, 兰州, 甘肃 730000, 中国; 2.中国科学院地理科学与资源研究所, 北京 100101, 中国
推荐引用方式 GB/T 7714	张建明,齐文文. 民勤绿洲土壤盐分组成与光谱特征[J]. 兰州大学, 中国科学院地理科学与资源研究所,2013,32(10):2620-2626.
APA	张建明,&齐文文.(2013).民勤绿洲土壤盐分组成与光谱特征.生态学杂志,32(10),2620-2626.
MLA	张建明,et al."民勤绿洲土壤盐分组成与光谱特征".生态学杂志 32.10(2013):2620-2626.