云南省腾冲油菜反射波谱特征与应用分析

以云南省腾冲县的油菜为例,探讨同种作物在不同生长阶段的光谱特点及其关系,探讨不同盖度情况下的同种作物的光谱特点及其关系。通过野外典型选样测定,并对测定数据进行处理和分析。研究初步表明,在375-670nm的范围内,其反射率随油菜开花量的增加而增加。在800-1100nm的范围内,其反射率随油菜开花量的增加而减少。在800-1100nm范围内,未开花油菜与全开花油菜的组合比例与其光谱组合比例比较接近。在368.4-738.2nm的范围内,盖度越高的菜地,其反射率越低。在741.2-1110.6nm的范围内,盖度越高的菜地,其反射率越高。在500-700nm范围内,土壤与覆盖度为100%的油菜的组合比例与其光谱组合比例比较一致。该研究对不同生长阶段油菜的识别以及不同盖度油菜的识别具有积极的应用意义。

A Pilot Study of Reflecting Spectrum Characteristics for Rape in Tengchong County of Yunnan Province

In this paper, rape is selected as an example in Tengchong county of Yunnan province for discussing the characteristics and relation of homogeneous crop in different growth periods and with different overlay degrees, through measurement of typical samples in the open, and processing and analyzing these data. The pilot study indicates that spectrum reflectivity increases from 375nm to 670nm and decreases from 800nm to 1100nm along with the increase of flowers of rape, and the combination scale is close to the spectrum combination scale of rape with full flower and without flower. The spectrum reflectivity decreases and increases with the growth of overlay degree from 368.4nm to 738.2nm and from 741.2nm to 1110.6nm, respectively. The combination scale is close to the spectrum combination scale of oil and rape with 100% overlay degree. This research is of practical significance to the recognition of different growth periods and different overlay degrees.