【摘 要】
：
土壤水分、盐分时空变异强,是影响土壤光谱特征的两个重要因素.土壤水分与盐分之间的关系以及土壤水分、盐分与土壤光谱特征间的关系直接关系到利用遥感光谱信息监测土壤盐渍
【机 构】
：
新疆大学资源与环境科学学院,新疆大学绿洲生态教育部重点实验室,中国科学院新疆生态与地理研究所,新疆策勒荒漠草地生态系统国家野外科学观测研究站
论文部分内容阅读
土壤水分、盐分时空变异强,是影响土壤光谱特征的两个重要因素.土壤水分与盐分之间的关系以及土壤水分、盐分与土壤光谱特征间的关系直接关系到利用遥感光谱信息监测土壤盐渍化的精度.该文运用多元统计学及可见光—近红外反射光谱分析方法对2010年10月渭干河—库车河三角洲绿洲盐渍土水分、盐分数据和盐渍土野外光谱数据进行分析,探讨该绿洲盐渍土表层(0～10 cm)水盐信息与野外光谱特征间的关系.结果表明:1)土壤水分和土壤电导率可用Cubic曲线拟合,相关系数R=0.8503,土壤盐分和土壤电导率也可用Cubic曲线拟合,相关系数R=0.842,但土壤水分与盐分之间的显著性较弱,相关系数R=0.74.2)与原始野外光谱相比,包络线消除后光谱波段与土壤水分和土壤电导率之间的Pearson相关性都有不同程度的提高,利用包络线消除法后的波段分别建立盐渍土土壤水分、土壤电导率后向回归预测方程,为动态水盐条件下的盐渍土遥感监测提供了理论依据.
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