甘蔗遥感估产的光谱辐射计方法

Remote Sensing Estimation of Sugarcane Yield Using Spectrovadiometer

甘蔗是一种重要的世界经济作物。在拉美、南美、东南亚各国及我国均有广泛种植。在我国南方,特别是粤、闽、桂、台等省区,不仅种植面积广,经济效益高,而且以甘蔗为基本原料的糖纸、化工和纤维材料工业,在地方工农业产值中占有重要的地位。因此,甘蔗估产对糖业资源调查及甘蔗综合工业体系的管理和决策具有重要的经济意义。

A new remote sensing technique for sugarcane yield estimation is described. The main instrument used in the study is Hand Held Ratioing Radiometer and spectral quantity is the reflectance ratio TM3/TM 4. Spectral measurements for sugarcane yield estimation were conducted in matured stage of the crop. In test area 10 plots of sugarcane field which amount to 500 mu (about 34 ha.) were selected as test samples. The results of regression analysis showed that there is a high correlation between X (reflectance ratio TM3/TM4) and Y (per mu havrest yield). The correlation coefficient is as high as 0.9431. The optimum mathematic model for sugarcane yield estimation was proved to be Log Y= a + bX. The calculation of relative error indicates that the yield estimation accuracy of remote sensing technique is twice as high as that of the traditional artificial method.