| 甘肃省两种主要草地类型的光谱反射特征比较 |
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| 引用本文： | 张 凯,郭 铌,王润元,司建华.甘肃省两种主要草地类型的光谱反射特征比较[J].农业工程学报,2009,25(13):142-148. |
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| 作者姓名： | 张 凯 郭 铌 王润元 司建华 |
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| 作者单位： | 1．中国气象局兰州干旱气象研究所，甘肃省干旱气候变化与减灾重点实验室，中国气象局干旱气候变化与减灾重点开放实验室，兰州 730020； 2．中国科学院寒区旱区环境与工程研究所，兰州 730000;中国气象局兰州干旱气象研究所，甘肃省干旱气候变化与减灾重点实验室，中国气象局干旱气候变化与减灾重点开放实验室，兰州 730020;中国气象局兰州干旱气象研究所，甘肃省干旱气候变化与减灾重点实验室，中国气象局干旱气候变化与减灾重点开放实验室，兰州 730020;中国科学院寒区旱区环境与工程研究所，兰州 730000 |
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| 基金项目： | 中国气象局新技术推广项目（CMATG2007Z09）；干旱气象科学研究基金项目（IAM200818-02） |
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| 摘 要： | 干旱荒漠草甸和高寒草甸是甘肃省两种主要的草地类型。2005－2007年，在安西草场和玛曲草场，分别对2种草地类型进行了光谱观测。文章分析和比较了2种草地类型的光谱反射特征及其差异性。结果表明，在可见光波段，荒漠草甸植被的冠层光谱反射率要高于高寒草甸植被，在近红外波段刚好相反；相同类型的草地，在不同的植被之间近红外波段的反射率差异较大。在可见光波段和近红外波段，荒漠草甸植被的叶片光谱反射大于冠层光谱反射，而高寒草甸植被则是冠层光谱反射大于叶片光谱反射；同一植被冠层光谱反射受植被长势影响明显；两种草地类型的红边特征参数表现为荒漠草甸小于高寒草甸。总之，高光谱遥感可以应用于草地植被的分类和长势监测。
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| 关 键 词： | 遥感，光谱分析，反射，荒漠草甸，高寒草甸，红边特征 |
| 收稿时间： | 2007/9/14 0:00:00 |
| 修稿时间： | 2009/9/13 0:00:00 |
Comparison of spectral reflectance characteristics of two main grassland types in Gansu province |
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| Zhang Kai,Guo Ni,Wang Runyuan and Si Jianhua.Comparison of spectral reflectance characteristics of two main grassland types in Gansu province[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(13):142-148. |
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| Authors: | Zhang Kai Guo Ni Wang Runyuan and Si Jianhua |
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| Institution: | 1. Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China; 2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China,1. Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China,1. Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China and 1. Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climate Change and Disaster Reduction of China Meteorological Administration, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China |
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| Abstract: | The arid desert meadow and alpine meadow are two main grassland types of Gansu province. From 2005 to 2007, spectral reflectance were measured in Anxi grassland and Maqu grassland. The spectral reflectance characteristics and differences of two main grassland types were analyzed and compared. The results showed that the canopy spectral reflectance of desert meadow was bigger than that of alpine meadow in the visible waves, while in the near infrared waves, that of desert meadow was smaller than that of alpine meadow. The differences of spectral reflectance between different vegetations that belong to the same type were significant in the near infrared waves. The canopy spectral reflectance of desert meadow was clearly smaller than the leaf spectral reflectance, while the canopy spectral reflectance of alpine meadow was bigger than the leaf spectral reflectance in the visible waves and the near infrared waves. The growing status of the same vegetation had great impact on their canopy spectral reflectance. The value of red edge parameters of alpine meadow was bigger than those of desert meadow. In conclusion, hyperspectral remote sensing can be effectively applied to classification and growth monitoring of grassland. |
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| Keywords: | remote sensing spectrum analysis reflection desert meadow alpine meadow red edge characteristic |
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