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翅碱蓬(Suaeda salsa)是土壤盐渍化较为严重的地区常见的植被类型,研究翅碱蓬群落特征可以间接反映下方土壤的化学性质。通过野外采集的17个翅碱蓬野外光谱数据和相应土壤样品的理化分析数据,探讨了土壤化学性质和翅碱蓬野外光谱之间的关系。结果表明,翅碱蓬二阶导数光谱1 121nm波段可用来反映土壤有机质和全氮的含量变化,二阶导数光谱1 208nm波段可以很好地反映土壤全磷的含量变化,一阶导数光谱353nm波段可以很好地反映土壤速效钾的含量变化最好,二阶导数光谱724nm波段可以很好地反映土壤pH值的变化,而反映土壤盐分含量变化最好的为一阶导数光谱950nm,这为翅碱蓬覆盖的区域利用遥感技术进行土壤化学性质监测奠定了基础。
Suaeda salsa is a common type of vegetation in the areas where soil salinization is more serious. The study on the characteristics of Suaeda salsa can indirectly reflect the chemical properties of the soil below. The field spectral data of 17 Suaeda salsa collected from the field and the physical and chemical analysis data of the corresponding soil samples were used to investigate the relationship between the soil chemical properties and the field spectrum of Suaeda salsa. The results show that the second derivative spectra of Suaeda stenopipes 1 121nm band can be used to reflect changes in soil organic matter and total nitrogen content, the second derivative spectra of 1 208nm band can reflect the content of soil total phosphorus changes, the first derivative of the 353nm band can be very The content of available potassium in soil was the best, and the second derivative spectrum at 724 nm could well reflect the change of soil pH value. The first-order derivative spectrum which reflected the change of soil salinity content was 950 nm, The area lays the foundation for the monitoring of soil chemical properties by using remote sensing technology.