翅碱蓬野外光谱对土壤化学性质变化的响应

目的]研究翅碱蓬群落特征以获取下方土壤的化学性质。方法]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]翅碱蓬二阶导数光谱1121nm波段可以用来反映土壤有机质和全氮的含量变化,二阶导数光谱1208nm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,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。结论]该研究为利用遥感技术进行翅碱蓬覆盖区域土壤化学性质监测奠定了基础。

Field Spectra of Suaeda salsa in Response to Changes of Soil Chemical Properties

Objective] This study was to investigate the Suaeda salsa community characteristics,further getting the soil chemical properties.Method] The paired-data of field spectra and corresponding soil physical-chemical property of seventeen samples was used to reveal the relationship between soil chemical property and field spectra(visible and near infra-red spectra)of S.salsa.Result] The second derivative spectrum of S.salsa at 1 121 nm could reflect the changes of soil organic matter and soil total nitrogen,and that at 1 208 nm could commendably indicate changes of soil total phosphorus and at 724 nm could indicate changes of soil pH.The first derivative spectrum of S.salsa at 353 nm can indicate changes of soil available potassium,and that at 950 nm could commendably reflect the changes of soil salt content.Conclusion] Our results laid basis for monitoring chemical property of soil covered with S.salsa using remote sensing technology.