摘要
本研究以江西省武功山金顶风景区的五节芒(Miscanthus floridulus)、野古草(Arundinella hirta)、飘拂草(Fimbristylis wukungshanensis)、中华苔草(Carex chinensis)、箭竹(Sinarundinaria nitida)为优势物种的5种主要群落为研究对象,以美国SVC HR-768野外便携式地物波谱仪测定的高光谱数据为基础,利用重采样、一阶微分和去包络线3种数据处理方法分别提取有效的光谱吸收特征参数,以此获得区分5种草地群落的光谱特征。结果表明,1)5种群落光谱反射率组间差异显著(P<0.05),光谱反射率表现为中华苔草>野古草>五节芒>箭竹>飘拂草;2)重采样处理得到的特征参数中500-600、600-700和1 200-1 300nm 3个波段的波峰/谷深度差别都最明显,一阶微分处理提取的红边、黄边和蓝边有关的特征参数也能够很好的将5种群落进行分类,而利用连续统去除法提取的特征参数中,吸收谷的宽深比差值最大可达到92,是区分5种群落最有效的特征参数;3)波峰/波谷对应的波长位置是山地草甸5种主要群落的共性参数。
Miscanthus floridulus , Arundinella hirta , Fimbristylis wukungshanensis , Carecc chinensis , Sinarundinaria nitida was the dominant species, respectively, of five different main communities in Jinding scenic of Wugong Mountain in Jiangxi Provience. The hyperspectral data of these five different main communities were measured using field portable spectroradiometers （SVC HR 768, USA）. The effective characteristic p rameters of spectral absorption achieved by three data processing methods including resampling method, firstorder differential method and continuum removal method to obtain the spectral characteristics distinguishing these 5 kinds of grassland communities. The analyzed results showed that there was significant difference between the variance analysis of each wave band of these 5 kinds communities and C. chinensis〉A, hirta M. floridulus 〉 S. nitida 〉 F. wukungshanensis based on reflectivity value. There was most significant difference between peak/Valley depth of the 3 wave bands（500-600 nm, 600-700 nm and 1 200-1 300 nm） which achieved by resampling method. The five communities can be well classified using the characteristic parameters related to red edge, yellow edge and blue edge. The maximum difference between aspect rations of absorption valley obtained from continuum removal method can reach as high as 92 which was the most effective parameter to distinguish the 5 communities. The corresponding wavelength position of the peak/trough was the common parameters of five main mountain meadow community.
出处
《草业科学》
CAS
CSCD
北大核心
2016年第8期1492-1501,共10页
Pratacultural Science
基金
国家科技支撑计划项目(2012BAC11B06)
国家自然科学基金项目(30960312
31560150)
江西省科技计划项目(20144BBF60002)
关键词
重采样
一阶微分
连续统去除
草甸群落
武功山
resampling
first-order differential
continuum removal
the meadow community
Wugong Moun-tain
